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32GB microsd cards coming soon?

Since I've bought my Omnia II I've been looking forward to getting a 32GB microsd card which the device claims to support. Only problem is that they don't exist yet and I can't find any information on when I can expect them to be in the market, or how much i'll be expected to shell out for one.
Anyone else holding out for a 32GB card? 16GB is a lot, but not nearly enough to hold all my music, let alone having room left for taking photo's/videos.

hopefully in a few months ,according to this http://www.engadget.com/2010/01/13/samsung-announces-64gb-movinand-flash-32gb-microsd-card/

I wouldn't hold out for anything...
Matt174e said:
Since I've bought my Omnia II I've been looking forward to getting a 32GB microsd card which the device claims to support. Only problem is that they don't exist yet and I can't find any information on when I can expect them to be in the market, or how much i'll be expected to shell out for one.
Anyone else holding out for a 32GB card? 16GB is a lot, but not nearly enough to hold all my music, let alone having room left for taking photo's/videos.
Click to expand...
Click to collapse
32GB microSDHC has been "coming soon" since 2007...and we're STILL waiting.

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=180478266772&ssPageName=ADME:X:AAQ:AU:1123
SanDisk 32GB class II microSD, anyone tried?

technillion said:
32GB microSDHC has been "coming soon" since 2007...and we're STILL waiting.
Click to expand...
Click to collapse
The new crop of microSD cards are getting ridiculous storage capacities for something this small - step back 16GB microSD cards, the 32GB cards are coming to town. SanDisk just might be the first to release microSD cards of this capacity.
By the way, this is the Swan song of microSDHC - they are capped at 32GB capacity. Coming to replace them will be the microSDXC variety (XC stands for "extended capacity").
Getting back on topic, SanDisk will release the world's first 32GB microSD cards next month and their price is expected to be 200 US dollars (150 euro), which obviously includes he early adopter's fee and the bragging rights that come with it.
We're joking of course, but 16GB microSD cards from SanDisk can be had for as low as 40 bucks - buying a phone with a hot-swappable card slot sounds like a good idea, doesn't it?
But if you absolutely must have one, you'd need 200 dollars by next month when these cards start shipping.
Source 200$?? LOL,,LET OBAMA PAY FOR EVERYONE OF THEM

SanDisk Launches 32GB MicroSDHC Card

Nazar78 said:
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=180478266772&ssPageName=ADME:X:AAQ:AU:1123
SanDisk 32GB class II microSD, anyone tried?
Click to expand...
Click to collapse
i use "SanDisk 16GB class II microSD" very fast, no problem.

Hai everybody, i am a new member to forums, so i am intereseted
and want to gain knowledge on this topics..........................thank u

I'm using SunDisc 32 Gb class 2 without any problem. It is not very good for watching films from it because 2 class (slow for film streaming with high bitrate), but for data, photo and music it is very nice. I copy film from card in to internal (8 Gb) memory and watch it.

32GB micro SD class 10, the best!

be carefull about sd
supersaiyanx said:
32GB micro SD class 10, the best!
Click to expand...
Click to collapse
Not all micro SD class 10 have the same speed my friend.
class 10 card means that meets the minimum requirements of class 10 of SD Card Association protype, which is 10 MB/second
in fact some quality class 6 cards may give you speed more than 10 MB/s, while cheap - low quality class 10 will give you just 10 MB/s or even worse theoretically 10MB/s under perfect weather ect condintions.....
par example samsung sd class 10 plus gives you up to these
• Speed Rating Speed (read) : 24MB/s
• Speed (write) : 21MB/s
which i think worth the few extra usd.
same brand's class 6 cards give you
Speed (Read) 17MB / sec.
Speed (Write) 12 ~ 13MB / sec.
which is much faster than low quality class 10
So you should rethink about class 10 now

Yeah i agree.
My Class 6 Sandisk transfers at 10MB/s beating my Class 6 32GB Gskill transferring at 6 MB/s max.
Sent from my GT-I8160 using Tapatalk 2

MicroSDHC 32GB C2 or 16GB C10?

I was thinking about upgrading from my current Sandisk 16GB c2. As many of you know Sandisk is out with there 32GB c2 MicroSDHC which is selling for $100 by Verizon. But if you look on ebay you can also find other 32gb c2/c4 MicroSDHC from TopRAM and Centon. Now I personally have never heard any of these company so I am very spectacle.
Now my question is which would you go with 32GB c2 or 16GB class c6/c10? To me its storage vs transfer rate.
1) Sandisk 32GB MicroSDHC Class 2 = $100
2) Kingston 16GB MicroSDHC Class 10 = $135

Clearly you should really been far 16GB storage even as decided to use even go want to do look more like 32GB transfer rate?

FYI 16gb class 10 Kingston is $98.99 over @ newegg and if you look hard enough u can find it around $79

I am not sure what you are saying but some claims that the Sandisk 32GB C2 they get around 5mb/s write. So IDK ATM as Kingston 32GB Class 6 is selling for $700 on ebay WTF? Last time I check they didn't even have 32GB class 2, could be fake who knows.

sti-06 said:
FYI 16gb class 10 Kingston is $98.99 over @ newegg and if you look hard enough u can find it around $79
Click to expand...
Click to collapse
I am aware of that as they been had it for sometimes now but I was more leading to 32GB but who knows if I do decide to go with 16GB I might go with C10 from Kingston.
But has anyone tried TopRAM 32GB Class 4 or Centon 32GB Class 4? If so is it thoughly tested via R/W IOPs and fully chunking the card.

HyperNode said:
I am aware of that as they been had it for sometimes now but I was more leading to 32GB but who knows if I do decide to go with 16GB I might go with C10 from Kingston.
But has anyone tried TopRAM 32GB Class 4 or Centon 32GB Class 4? If so is it thoughly tested via R/W IOPs and fully chunking the card.
Click to expand...
Click to collapse
You cant go wrong with ScanDisk
its a safe bet

ilordvader could you test the R/W speed of your card and post back.

So after searching and reading many threads in various forums I came to the conclusion that even class 6 is an overkill so class 10 is out of the question other than bragging rights.
Now has anyone used Transcend or A-Data? they seem to be selling at Newegg so they can't be questionable unknown like TopRAM or Centon which I never even heard of until I was searching for MicroSDHC.
Anyone recommend any 16GB class 6 cards? I am still unsure on not ordering SanDisk 32GB Class 2 as storage is high but the speed is low. As majority of user who running Android port do recommend getting anything over class 2.

Extreme candidates:
Sandisk 32GB MicroSDHC Class 2 - $100 < Storage
Kingston 16GB MicroSDHC Class 10 - $135 < Speed
Are these the only reputable 16GB Class 6 candidates?
A-Data 16GB Class 6 - $53.99
Transcend 16GB Class 6 - $62.99
Lexar 16GB Class 6 - $69.99 < Questionable; produce inferior products
Has anyone heard of these company before?
Centon 16GB Class 6 - $58.99 < Questionable; but listed under Newegg
3C_Pro 16GB Class 6 - $44.99
TOPRAM 16GB Class 6 - $44.99
Team 16GB Class 6 - $44.99

i bought this. Komputerbay 32GB MicroSD SDHC Microsdhc Class 6. £88, which was preety steep.
i get read speads of around 3.5 mb/s and write speeds of 4.5 mb/s, i cant find my 2 speed to compare but it does seem quicker.
though the web site gaurantees minimum 6 mb/s write speeds.
it was amazon so i though it would be ok.
edit.
just tested it again i am getting 6 mb/s read speeds now.

johnwalk did you thoroughly test the card? by formatting and filling it up fully with chunks? if you can confirm its overall performance then I might also order it. Can't wait for other vendors to make it as I need it now. On class 2 card it takes like 30min to just move around 4.5gb now that's way to long for me as I'm always on the go, but thanks for your reply as ill look in to that company.

I don't want to spoil anything, but my HD2 just destroyed my 8GB Sandisk card. 'Luckily' this was not a $100 card, but still.......
Are you shure you want to spent that much, or did you never have your previous card(s) being destroyed?
Wish you goodluck anyway

i just formated it normally the filled it up with music and video still got two gigs left im like a dog with two tails i dont know what to listen to first lol. but the tests i done with it was when it was 28 gigs full only had it two weeks and at first it was slow, especially when you went into the music player it took a few seconds to update but hey a lot of files to browse but its been ok the past few days, but im now at the stage where i dont plug it into my computer anyway i just access my pc and transfer albums by wifi takes about a minute an album, any video usually gets streamed anyway, but wanted a bigger selection when i go on holiday next month.
def recomend this card thougth the first few days i thought i should have gone for the class two, im now happy with it now it all working properly.

I'm at work now and in an hour when I go home ill thoroughly look in to this card and post my finding. As I never even have heard of the company and if I like it ill post feedback here so others can buy it with confidence.
Far as flr goes how did HD2 destroy your card? corrupted the data? or the flash device is unreadable fully? BTW I never needed an flash card before as this is my first smartphone. Also I was welling to spend $750 few months before HD2 was officially deployed in USA. So I'm not worried about $100.
PS: Also have an eye on HD3 as the spec is 90% accurate from my guess after looking at the specs. So let's see what happens as I don't want a device which may have 2 versions, hence EU-Leo512 and EU-Leo1024.

off topic but im seriously looking into the new batch of android tablets which are just coming out now, maybe 7" or 10"

HyperNode said:
I'm at work now and in an hour when I go home ill thoroughly look in to this card and post my finding. As I never even have heard of the company and if I like it ill post feedback here so others can buy it with confidence.
Far as flr goes how did HD2 destroy your card? corrupted the data? or the flash device is unreadable fully? BTW I never needed an flash card before as this is my first smartphone. Also I was welling to spend $750 few months before HD2 was officially deployed in USA. So I'm not worried about $100.
PS: Also have an eye on HD3 as the spec is 90% accurate from my guess after looking at the specs. So let's see what happens as I don't want a device which may have 2 versions, hence EU-Leo512 and EU-Leo1024.
Click to expand...
Click to collapse
Hope the HD3 is for Att this time

I've got up to 14.7 MB/sec on my 16GB Kingston Class 10.. and my phone works soo smooth now!
Compared android sliding of homepage on my 2GB Class 2 card and my 16GB Class 10 card, and there is some lag with the 2GB card, and none at all (100% realtime) with the 16GB card..
So, personally I'd say; save some exrtra bucks and go for the 16GB Class 10 Kingston one!

@HyperNode
There are several threads here regarding SD cards being destroyed, or whatever description is given to it.
From one moment to another you get the message that you're card has to be formatted. If you accept it, it says something like (only) 30 MB being available, which doesn't get formatted. Your card can no longer be seen by your HD2, nor by your PC or any other cardreader (afaik)
I´ve never had this problem before. It looks like a specific HD2 problem.
Either with or without a combination to a specific brand or card.
I'm very curious about your experiences.
Please keep us updated.
Thanks and goodluck!

Same here. Mythen hd 2 just destroyed my SD card des SYstem ago
It happened already bevor, Thatcher i couldn't See Thema data anymore , but nie i Cantel even Format it anymore
Sent from my HTC Desire using Tapatalk

HD2 Memory 32G $99 CLASS 4!

Kingston 32GB Micro SDHC Flash Card with MicroSD Reader Gen 2 Model MRG2+SDC4/32GB
Average Rating 5 out of 5 eggs5/5(1 reviews)
In stock.
Now: $99.99
*
Free Shipping (restrictions apply)
Additional fees may apply to shipments to AK, HI and PR.
At New Egg!

This is worth it, take it from someone who was looking for something other than SanDisk 32GB C2 I have been waiting for Kingston's 32GB C4 for long time and when it came out I got it though offical site for $159.

Yeah, I ordered one of these last week from newegg along with an otterbox defender case for $33 w/free shipping for both.... not too bad at all. Should be getting them today. Has anyone used the Kingston class 4 32gb card for running android on the hd2?
Sent from my HTC HD2 using XDA App

Well, far as I know people do claim the R/W IOPs for HD2 when card inside the device won't go beyond class 2 rate but some who did use class 4-6 cards said they did see major improvement in terms of loading OS/Apps from mSD card. Anything beyond class 4 is an overkill on HD2 that I accept unless you are moving around massive amount of data and use HD2 as your mean to transfer it, in that case just buy thumb drive.
"Sent from my PC using THE hand" lol

I was in a Fry's Electronics the other day and I saw a 16gb Class 10 microsd card for $32.00. Don't remember the maker but it was not name brand, that is extremely questionable

wow
my videos which are about 12g play almost instantly now i love this card and the free usb reader, thanks kingston

Ya this card was worth waiting for hell I shot up an storm in this section comparing other vendors. Now I have the SanDisk 16GB C2 card not sure what to do with it, hopefully I can sell that cheap.

same
stuck with the sandisk

I ordered this 32GB class 4 card from Kingston and it is much slower then my old SanDisk card. Booting Android took over 5 minutes and after that the device still is VERY slow.
With its card reader I could copy my files onto it with 3-4MB/s.
Then I installed SKTools under Windows Mobile and used its benchmark tool to compare my SD Cards:
My old SanDisk 8GB card (stock one from the blackstone, afaik class 2): ~6,6MB/s reading and 1,1-1,5MB/s writing
The new class 4 32GB Kingston card: ~2,2MB/s reading and 500-700KB/s writing
So I can't use Android with this crappy SD card.

Ya IDK man same on my end. Took me 25min to traf 320mb files, ATM showing me 116min to traf 4.1gb.

i got kingston 23gb class 4. really disappointed takes forever to transfer. but speed test shows its class 4.
http://forum.xda-developers.com/showthread.php?t=861232
oh yeah i got the one from frys it rocks to bad its not 32gb.

I would stick with SanDisk.
I wanned to try out a faster card so got a class 6 Kingston 8gb.. while it loaded things faster, it caused severe stuttering and lagginess at times.
Upon reserach i found, kingston, and many other cards are not the same quality grade as sandisk, i am told in order to be price competitive they buy crap from others at cheap and stick thier name in it. And sometimes they buy rejects from sandisk, toshiba, samsung etc and brand them.....
Unfortunately i cant remmeber the links i researched....
So i would stick with sandisk, or another proven manufacturer....

UThis is total BS, I started it at like 6PM and now its 10:40PM and still 78min's to go WTF and its just 4.2GB music files avg at like 3-6mb/ea. Now I remember putting the whole dir in SanDisk 16GB Class 2 in less than 40min. So WTF does it take so long? Also as I wrote to Kingston CS ill share it here.
To make the file transfer go faster you have to directly allocate the file in memory thus saving time for R/W IO access. I did test many times but I am not even sure HD2 is following SD 2.0 or is it just this POS card no were close to even the stock SanDisk's.
Test: Dir with 5 files at 5mb/ea so thats 25mb. If you copy each file you reduce the time by 3x but if you copy the dir all the objects inside takes time to allocate for some reason.
PS: I am thinking about now getting SanDisk 32GB Class 2.
***UPDATE***
3.85GB
Write
--------
SanDisk 16GB Class 2 = 26min
Kingston 32GB Class 4 = 191min

HyperNode said:
Ya IDK man same on my end. Took me 25min to traf 320mb files, ATM showing me 116min to traf 4.1gb.
Click to expand...
Click to collapse
I also don't understand this.. I have a 16gb C2 card and wanted to experiment a lot with the various android roms out there, so thought a C4 would be the answer. ordered a 16gb C4 and it is always slower than the C2. a full 30 seconds on booting Android.
This confuses me.....okay okay .. thats not hard to do, but as far as I'm concerned if a card is rated at twice the "constant" speed of the other .. it should be faster...
<fx: scratches head and moves on>

HyperNode said:
Well, far as I know people do claim the R/W IOPs for HD2 when card inside the device won't go beyond class 2 rate but some who did use class 4-6 cards said they did see major improvement in terms of loading OS/Apps from mSD card. Anything beyond class 4 is an overkill on HD2 that I accept unless you are moving around massive amount of data and use HD2 as your mean to transfer it, in that case just buy thumb drive.
"Sent from my PC using THE hand" lol
Click to expand...
Click to collapse
I think it really depends on the card and not the class. I have a couple of Class4 and Class6 cards with identical builds of android and my class2 16gb continually outperform them in boot times and general speed. Class only designates write speed and there is a lot more to an SD card's performance that is not captured in the class designation.

ATM I am thinking about returning the Kingston 32GB C4 as I spoke to Kingston Tech Support and might go with SanDisk 32GB C2. Alot of people say SanDisk is superior and is faster for some reason and getting close to class 4 rating.

HyperNode said:
ATM I am thinking about returning the Kingston 32GB C4 as I spoke to Kingston Tech Support and might go with SanDisk 32GB C2. Alot of people say SanDisk is superior and is faster for some reason and getting close to class 4 rating.
Click to expand...
Click to collapse
I can only quote my experience and that is that kingston C4 is NOT fast at all.
Good luck to you.. and if you find the San Disk C4 is sooo much faster than the C2 can you report back please .. ?? So I can go get one

I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i thought that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??

gothikserpent said:
I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i thought that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??
Click to expand...
Click to collapse
LOL you are way to funny man as you said "I just bought a kingston 32gb class 6 micro sdhc" and then on top of that "Turns out that it is authentic".
I am guessing you got this card from eBay? If thats the case then its fake ill tell you why as there is no Kingston 32GB Class 6 card ATM. My best bet is you do extended data testing on it and verify the content to make sure its not corrupted. But if I was you I wouldn't do any of this as ill return that POS, why take chance with your data? Also NEVER buy memory cards via eBay or else you will be pwned with notorious chinese fakes.
But for those who actually thinking about buying the legit Kingston 32GB Class 4 microSD read below and think twice.
STHNS said:
Here this might be helpful to you.
Code:
df /dev/mnt/sdcard
File system: FAT32 (0x0c)
Used space: 16.0 KB (16,384 bytes)
Free space: 29.8 GB (32,073,891,840 bytes)
The data below is the actual IOPs from System (USB: Standard-A) to Device (USB: Micro-B) via USB (USB 2.0/SD 2.0). I am not using any type of card reader for this test as we only want the actual data rate of the card itself natively while its mounted in the device.
Subject: Kingston 32GB Class 4 (4MB/s) microSDHC.
Sequential Test Data (Block Size = 1024KB|0 Fill = 0x00)
Read [MB/s]: 13.07+11.72+13.11=37.9/3=12.63
Write [MB/s]: 4.080+3.339+1.592=9.011/3=3.00
Sequential Test Data (Block Size = 1024KB|1 Fill = 0xFF)
Read [MB/s]: 13.07+13.10+11.61=37.78/3=12.59
Write [MB/s]: 3.659+2.618+3.607=9.884/3=3.30
Mode: Low level R+W+V initialization
Data volume: 30588MBytes
Patterns: 18 sets, 8 of "walking one", 8 of "walking zero", 55h, AAh
Writing speed [03:24:28]: 2.49 MByte/s
Reading speed [00:44:20]: 11.5 MByte/s
Burst write: 4.0+4.0+4.0=4.0 MB/s
Burst read: 10.0+9.0+9.0=9.33 MB/s
Click to expand...
Click to collapse

It's class 4 but it's very expensive.. too much money for just a SD card

Which type of memory chip?

Hello. I bought this phone last week and I absolutely love it. I've been searching the forums and can't wait to upgrade Android and install apps. This is my first android phone and I like how it can be customized. Before I do anything, I want to purchase a memory chip for the phone. I want to install and run apps from the chip but unsure of which to get. What size, brand, and class do you recommend? I have a 8gb class 2 from my old phone. Is that good enough? I'm thinking about getting either a 16-32 gb. Thanks.

I have a 8GB Sandisk Class2 for ~12€ from eBay. Works perfectly, even with Apps2SD.

I think a memory card class 4 or higher is reasonable!

Ruslan88 said:
Hello. I bought this phone last week and I absolutely love it. I've been searching the forums and can't wait to upgrade Android and install apps. This is my first android phone and I like how it can be customized. Before I do anything, I want to purchase a memory chip for the phone. I want to install and run apps from the chip but unsure of which to get. What size, brand, and class do you recommend? I have a 8gb class 2 from my old phone. Is that good enough? I'm thinking about getting either a 16-32 gb. Thanks.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showpost.php?p=13021193&postcount=10

I'm using a 16 GB Class 6 (14 GB free memory and 700 MB for Link2SD).
I bought a Class 6 because i heard that there might be some problems with Link2SD/App2SD and Classes less than 6...
I haven't any problems with it -> Ebay 40 €

If you are going to install a custom ROM then I would be careful about using a 32Gb card as I have heard of people having problems with them. As vqt907 has said, I would go for at least a class 4 card.

I have a Kingston 8GB Class 2.
Works very fast, also with app2sd.

16 gig speed 6, with two adapters USB and normal memory card size for 25 pounds from Amazon....works well....d
MY ANDROIDSKY

Ps get sd speed increase from market it's a must.....d
MY ANDROIDSKY

I was considering upgrading my SD card from a class 4 to a class 10, for the speed improvement. So, I first tested my card to see what it's current speed was.
My card is an LD ( class4 8GB, bought off the street in China:
Write: 11.7 MB/s
Read: 18.0 MB/s
If my understanding of speed class correctly, this is class10 speed, not class4.
So I tested my Chinese "Kingston" - mostly likely a "ghost shift" chip, also class4 8GB:
Write 7.1 MB/s
Read 14.7 MB/s
This is class6 speed, not class4.
So, if you buy counterfeit chips in China (or online from China), you can get a class10 chip for very cheap, I paid $13 for my 8GB card. Just test the speed before you buy.
So check the speed of your card before you buy a new one.

typci said:
...So, if you buy counterfeit chips in China (or online from China), you can get a class10 chip for very cheap, I paid $13 for my 8GB card. Just test the speed before you buy.
So check the speed of your card before you buy a new one.
Click to expand...
Click to collapse
... and check out if there is the right memory on the chip

16 gb - class 6
best money-performance ratio .
You will not need anything more .

A proper branded Memory card like Sand disk, Transcend, Kingston and so on.
Never get fakes or non-branded ones as a 99% chance of pre broken risk is at your slide (personal experience)
A class 4 or higher would be reasonable.

I've been planning on buying a new sd card since the default 2gb is waaaay to small and I've got a few questions.
My current write/read speeds are 7.0Mb/s~ and 12.6Mb/s - which class is that?
How big is the actual practical difference between let's say, a class 6 and a class 10 card?

look like class 6, class number is write speed in MB/s. btw, there is no reason to buy class 10 duo very slow pc>phone>pc transfer rate. I can get more then 2-3MB/s (cable, wireless)

bataya said:
look like class 6, class number is write speed in MB/s. btw, there is no reason to buy class 10 duo very slow pc>phone>pc transfer rate. I can get more then 2-3MB/s (cable, wireless)
Click to expand...
Click to collapse
I get 25MB write/35MB read on my Transcent 8GB C-10

25MB on 10c card? How do you test speed?
Sent using Tt.

bataya said:
25MB on 10c card? How do you test speed?
Sent using Tt.
Click to expand...
Click to collapse
"SD-Tool" on phone (slower) 16MB write 24MB read
And "H2Testw" on PC which have me the readings. [nVidia USB 2.0 Hi-speed @ 480Mbit/s]

Very nice card ;ooo but only 25 mb ;c

SD Strange-results - or - How I learned to love CM7 on SD - Dec-11 results compiled!

1/16/2012 update: Thanks to waxhell for compiling all of the results in this thread (at least as of mid-december! OK, so I took a while to get this posted...)
https://docs.google.com/spreadsheet/ccc?key=0AjPE3ZAD2eVudE9vZmQ3aHlfTkFvU2J4ZUplRDJQTEE
5/20 update: SD card performance benchmark table by a.fenderson from later in this thread added at the bottom of this post. Thank you a.fenderson!
------------------
April minor update with a Transcend SD (see http://forum.xda-developers.com/showpost.php?p=12964262&postcount=8)
_________________________________________________
Let me tell you my story.
Over the last couple of months as I have mucked around with SD booting various flavors of froyo and, more recently, CM7, I have found it maddening that there are apparently so many people that LOVE those versions, even people that seemed to have the same SD card as the two I've tried.
One of those is a Class 10 Patriot 8gig, which I've seen mentioned as an acceptable boot disk.
The other is a Kingston Class 4 4gig that tests out as significantly slower than the Patriot, but didn't really run froyo any slower.
Now I know I've seen posts that mention small block write speed as being important, but the numbers I've seen posted really didn't make me think the Patriot was the cause...
...the cause of FRUSTRATINGLY slow UI, where froyo (and CM7) seem to go off into lala-land for a few seconds every time I (tried to) do something.
...the cause of glacial web-surfing, where even downloading GOOGLEforchrissake takes forever. Of snail's-pace market downloads. Oh god.
Every time I would give up and go back to Eclair and breath a sigh of relief, reveling in the snappiness, the zippy web-surfing, the rapid response of m.pornhub.com.
And every time the siren song of the CM7-elite would call me back. THIS time I did something different. I saw mention that a Class 2, YES A FREAKING CLASS 2, Sandisk from costco worked well. So I skippity-skopped up and bought one.
After backing up the Patriot and writing THAT VERY SAME img to the Sandisk (which, yes, took 3 times as long as writing to the Patriot), I booted CM7.
OMG
The heavens opened and the angels sang, I HAD ARRIVED IN THE PROMISED LAND!
NOW I knew what the chosen had been praising! NOW I knew the joy that is CM7! ZIP-ZIP-ZIPPITY!
HOLY CRAP?! How could a benchmark be so misleading? I HATE those bastard SD manufacturers, or maybe it's the industry group that chose such a sucky measure of speed.
For your edification, here are some CrystalDiskMark (5 iterations, 50MB) results from 2 sucky cards and the good Sandisk.
__Test_________________Sandisk 8G Class 2___Patriot 8G Class 10____Kingston Class4 4Gig
Sequential Read :__________10.871 MB/s________20.036 MB/s___________18.700 MB/s
Sequential Write :__________6.659 MB/s________13.660 MB/s____________4.277 MB/s
Random Read 4KB (QD=32) :___3.077 MB/s_________3.444 MB/s____________2.088 MB/s
Random Write 4KB (QD=32) :__1.791 MB/s________0.038 MB/s_____________0.016 MB/s
Look at that, both the Kingston and the Patriot blow away or are close enough to the Sandisk in everything BUT....
(wait for it)....
SMALL BLOCK RANDOM WRITES
where the Sandisk is FIFTY times the speed of the Patriot and ONE HUNDREDtimes the Kingston.
Now you may say, "Swizzlenuts, old pal, I KNEW that."
But for all you poor slobs who didn't, who are dragging yer sorry ass through the broken glass that is booting off of a slow SD (you know who both of you are), I hope this helps.
And now you may commence posting links to specific posts where this info was discussed in detail last December.
------------------
Thanks to all of the people that posted their results and to a.fenderson for compiling them. Here's his table from http://forum.xda-developers.com/showpost.php?p=13991898&postcount=144
Code:
POSTER BRAND CLASS CAPACITY 4 KB RANDOM
(GB) WRITE QD32(MB/s) NOTE
swoozle SanDisk 2 8 1.791 Model: SDSQ-8192-AC11M
a.fenderson SanDisk 4 16 1.660 SanDisk C4 16GB 1 of 2 cards
MickMcGeough SanDisk 4 8 1.59 benchmarked in XBench, QD unknown
a.fenderson SanDisk 4 16 1.500 SanDisk C4 16GB 2 of 2 cards
Awats SanDisk 4 16 1.391 SanDisk C4 16GB 1 of 2 cards ; fastest (onboard) reader
arwild01 SanDisk 4 8 1.369
Awats SanDisk 4 16 1.284 SanDisk C4 16GB 2 of 2 cards ; fastest (onboard) reader
robot8 SanDisk 4 8 1.270 SanDisk C4 8GB 2 of 2 cards
robot8 SanDisk 4 8 1.259 SanDisk C4 8GB 1 of 2 cards
chinly43 SanDisk 4 16 1.257 (not via Nook) ; same card as chinly43's other listed SanDisk C4 16GB
joobu SanDisk 4 4 1.175
angomy Nook internal N/A N/A 1.116 via Nook on USB
chinly43 Nook internal N/A N/A 1.094 via Nook on USB
a.fenderson Transcend 2 32 1.032
a.fenderson SanDisk 4 4 0.898
a.fenderson SanDisk 2 4 0.891
pchoi94 SanDisk 4 16 0.834
chinly43 SanDisk 4 16 0.769 via Nook on USB ; same as chinly43's other listed SanDisk C4 16GB
pryonix SanDisk 4 8 0.625
chinly43 SanDisk 2 8 0.616
a.fenderson SanDisk 4 8 0.596
angomy SanDisk 4 16 0.574
Blue6IX SanDisk 2 16 0.350
a.fenderson SanDisk N/A 2 0.269
Awats SanDisk 4 2 0.261 SanDisk C4 2GB 1 of 2 cards ; fastest (onboard) reader
Awats SanDisk 4 2 0.236 SanDisk C4 2GB 2 of 2 cards ; fastest (onboard) reader
pryonix Samsung N/a 2 0.093
victle Kingston N/A 2 0.051
victle Dane-Elec N/A 2 0.050 0.050 or less: exact value unspecified
joobu Lexar 4 8 0.038
swoozle Patriot 10 8 0.038
Blue6IX Dane-Elec 4 4 0.037 (made in Japan)
omghahalol Transcend 6 16 0.037
Ravynmagi Samsung(??) 2 4 0.037
pryonix Kingmax 10 16 0.036
Ravynmagi Wintech 10 16 0.036
victle Transcend 6 4 0.034
omghahalol Transcend 6 8 0.033
Ravynmagi SanDisk 2 8 0.033
pryonix Transcend 6 8 0.033
Ravynmagi Patriot 10 16 0.030
Blue6IX PNY 10 8 0.030
pchoi94 Kingston 2 16 0.030
swoozle Transcend 6 8 0.029 Model: TS8GUSDHC6
joobu ?? N/A 2 0.029
chinly43 SanDisk N/A 1 0.029
a.fenderson SanDisk N/A 1 0.028
victle PNY 4 8 0.028
Blue6IX PNY N/A 2 0.027 (made in Taiwan)
omghahalol SanDisk 2 2 0.021
MickMcGeough SanDisk 2 8 0.02 benchmarked in XBench, QD unknown
robot8 Transcend 6 8 0.018 Transcend C6 8GB 1 of 2 cards
ExploreMN Patriot 10 16 0.018
arwild01 Samsung(??) 4 8 0.017
swoozle Kingston 4 4 0.016 Model: SDC4/8GB
Awats Patriot 4 4 0.016 Patriot C4 4GB 1 of 2 cards ; fastest (onboard) reader
robot8 Transcend 6 8 0.014 Transcend C6 8GB 2 of 2 cards
Tnexus Patriot 10 16 0.014
a.fenderson Kingston 4 8 0.014
Awats Patriot 4 4 0.011 Patriot C4 4GB 2 of 2 cards ; fastest (onboard) reader
chinly43 Lexar 4 8 0.011

I love the kubrik reference in title.
so my cheapy microcenter 4gb is why my HC preview was just "okay"

Both entertaining and edifying.
Thanks, swoozle! (I mean "swizzlenuts" old pal?)
Now if only that obscure performance metric were easily determined from printed SD card specifications...

Yeah, I have two old 2G uSD (no classified) and both work fine with CM7. The benchmarks are almost as good as the well tested Transcend 4GB class 6, random write speed beat the Transcend, but random read is little bit slower

My Kingmax card works butter smooth with CM7......but always hangs up on nookie froyo....
So, I am gonna buy sandisk now

I experienced the same thing
All my so call fast cards (class 6 and class 10) worked very slow or had boot problems. After switching the to the Costco Sandisk class 4 card, I was able to use CM7, HD, and all the other images with good preformance from the SD card.
swoozle said:
Let me tell you my story.
Over the last couple of months as I have mucked around with SD booting various flavors of froyo and, more recently, CM7, I have found it maddening that there are apparently so many people that LOVE those versions, even people that seemed to have the same SD card as the two I've tried.
One of those is a Class 10 Patriot 8gig, which I've seen mentioned as an acceptable boot disk.
The other is a Kingston Class 4 4gig that tests out as significantly slower than the Patriot, but didn't really run froyo any slower.
Now I know I've seen posts that mention small block write speed as being important, but the numbers I've seen posted really didn't make me think the Patriot was the cause...
...the cause of FRUSTRATINGLY slow UI, where froyo (and CM7) seem to go off into lala-land for a few seconds every time I (tried to) do something.
...the cause of glacial web-surfing, where even downloading GOOGLEforchrissake takes forever. Of snail's-pace market downloads. Oh god.
Every time I would give up and go back to Eclair and breath a sigh of relief, reveling in the snappiness, the zippy web-surfing, the rapid response of m.pornhub.com.
And every time the siren song of the CM7-elite would call me back. THIS time I did something different. I saw mention that a Class 2, YES A FREAKING CLASS 2, Sandisk from costco worked well. So I skippity-skopped up and bought one.
After backing up the Patriot and writing THAT VERY SAME img to the Sandisk (which, yes, took 3 times as long as writing to the Patriot), I booted CM7.
O
M
G
The heavens opened and the angels sang, I HAD ARRIVED IN THE PROMISED LAND!
NOW I knew what the chosen had been praising! NOW I knew the joy that is CM7! ZIP-ZIP-ZIPPITY!
HOLY CRAP?! How could a benchmark be so misleading? I HATE those bastard SD manufacturers, or maybe it's the industry group that chose such a sucky measure of speed.
For your edification, here are some CrystalDiskMark results from 2 sucky cards and the good Sandisk.
__Test_________________Sandisk 8G Class 2___Patriot 8G Class 10____Kingston Class4 4Gig
Sequential Read :__________10.871 MB/s________20.036 MB/s___________18.700 MB/s
Sequential Write :__________6.659 MB/s________13.660 MB/s____________4.277 MB/s
Random Read 4KB (QD=32) :___3.077 MB/s_________3.444 MB/s____________2.088 MB/s
Random Write 4KB (QD=32) :__1.791 MB/s________0.038 MB/s_____________0.016 MB/s
Look at that, both the Kingston and the Patriot blow away or are close enough to the Sandisk in everything BUT....
(wait for it)....
SMALL BLOCK RANDOM WRITES
where the Sandisk is FIVE times the speed of the Patriot and TEN times the Kingston.
Now you may say, "Swizzlenuts, old pal, I KNEW that."
But for all you poor slobs who didn't, who are dragging yer sorry ass through the broken glass that is booting off of a slow SD (you know who both of you are), I hope this helps.
And now you may commence posting links to specific posts where this info was discussed in detail last December.
Click to expand...
Click to collapse

I have a Transcend 8gb class 6 and Kinkmax 8gb class 6 none work well. The Transcend is by far the better of the two. I have now ordered a 16GB Sandisk class 2 to see how that works.

Update:Transcend
Just a minor addition with a Transcend card. I'd seen many posts that swore by a Transcend Cl 6 8G card through Newegg. I ordered, received, benchmarked and loaded CM7 Nightly 37.
To cut to the chase, the Transcend sucked big hairy monkey balls. Similar small block write speeds as the other crappy cards. And the CM7 performance was predictably bad. Crappy UI response and FCs.
__Test_________Sandisk Cl2 8G___Patriot CL10 8G____Kingston Cl4 4Gig___Transcend Cl6 8G
Sequential Read___10.871 MB/s____20.036 MB/s___________18.700 MB/s___________19.930 MB/s
Sequential Write___6.659 MB/s____13.660 MB/s____________4.277 MB/s___________19.325 MB/s
Rndm Rd 4KB(QD32)__3.077 MB/s_____3.444 MB/s____________2.088 MB/s___________2.968 MB/s
Rndm Wrt 4KB(QD32)_1.791 MB/s_____0.038 MB/s____________0.016 MB/s___________0.029 MB/s
I'm sure any of these would work fine as data cards. But for running off of SD, it makes a huge difference.

Have to agree. Have 3 8gb microSD cards including a Patriot and a Kingston but the only one that reliably runs CM7 is the cheapo SanDisk

+1.
My PNY card was too slow and it took forever to download apps from market (CM7) and I replaced it with a old 8G class 2 sandisk.. Man.. no need to say it..
BTW, anyone why does sandisk makes class 6 or class 10 micro SD card? I did find the extreme III of SD card only... and not the micro card.

swoozle said:
Just a minor addition with a Transcend card. I'd seen many posts that swore by a Transcend Cl 6 8G card through Newegg. I ordered, received, benchmarked and loaded CM7 Nightly 37.
To cut to the chase, the Transcend sucked big hairy monkey balls. Similar small block write speeds as the other crappy cards. And the CM7 performance was predictably bad. Crappy UI response and FCs.
...
I'm sure any of these would work fine as data cards. But for running off of SD, it makes a huge difference.
Click to expand...
Click to collapse
I have been running off a Transcend CL6 8G card and while my install felt zippy and pretty smooth, I have been having some FC issues and random quirkiness. I believe you have smacked the nail on the head here in that what really matters is the speed of the small block random writes. Having ruled out all other possibilities, it is the only thing that may explain why I am having intermittent artifacts in my streaming video.
Thank you for posting your tests and results, gonna go grab an el cheapo Cl2 card asap.
edit: So I picked up a cheap Class 2 Sandisk 8G card and it's been rock solid on the latest nightly 41 with 4.18C test kernel.

From my experience using CM7 on different high-speed uSD cards (Kingston, Patriot and Transcend), the results between brands and within brands are inconclusive and inconsistent. I'm beginning to think it has more to do with the individual card, i.e., the luck of the draw (or lack thereof). With such hit-or-miss results, perhaps the best approach is to keep trying until you find a good one.

I'm having a similar oddity... I have CM7 installed to eMMC, and on an 8GB Class 4 SanDisk MicroSD. The microSD actually boots /faster/, and has less UI lag than the internal memory!
Wondering if I messed up the flash (redid it a few times with no real change), install process, or if the internal memory is actually slower than the microSD somehow. Kind of backward thinking to my mind, but hey...

I think SD card variability isn't sufficiently highlighted in instructions for running off the SD card. I had issues with a Transcend class 6 4 GB card but no issues with an unclassified 2 GB.
If this issue is highlighted I think it might avoid a lot of frustration.

I'm seeing similar results with my cards on Random Write 4KB(QD32):
Sandisk Class 4 4GB:_________1.175 MB/s
Random unclassified 2GB:_____0.029 MB/s
Lexar Class 4 8GB:___________0.038 MB/s

swoozle said:
__Test_________________Sandisk 8G Class 2___Patriot 8G Class 10____Kingston Class4 4Gig
Sequential Read :__________10.871 MB/s________20.036 MB/s___________18.700 MB/s
Sequential Write :__________6.659 MB/s________13.660 MB/s____________4.277 MB/s
Random Read 4KB (QD=32) :___3.077 MB/s_________3.444 MB/s____________2.088 MB/s
Random Write 4KB (QD=32) :__1.791 MB/s________0.038 MB/s_____________0.016 MB/s
Look at that, both the Kingston and the Patriot blow away or are close enough to the Sandisk in everything BUT....
(wait for it)....
SMALL BLOCK RANDOM WRITES
where the Sandisk is FIVE times the speed of the Patriot and TEN times the Kingston.
Click to expand...
Click to collapse
I have only ever seen the sequential speeds quoted in specs. In fact, if the SanDisk was only 10x faster then the Kingston would need to be .16 and not .016 right? So isn't the sandisk actually 50x and 100x faster?
How can we find card with decent random r/w performance though, does anyone spec for that?

Woops, you are correct. Missed a zero, thanks.
No, I've never seen such a spec quoted either. I imagine it's because any normal use of an SD card doesn't depend on random write speed so much.

Hm, here I had given up running anything from an SD since I failed to even boot up either Froyo or CM7 with mine. But I have a 16gb Sandisk class 2 in my other phone! Going to try that then.
Noobquestion, how do you back up an android SD-card? Can I just copy paste the entire card to my pc hard drive, and then transfer it back when I want to use it in my phone again? Or do I have to use some kind of backup program?

The results are not strange. Card class only reflects sequential speed, but random speed is more important for OS operation. For example, ReadyBoost certified Flash drives have to have certain minimum random access speed.
Similar issue was brought up when people tried to replace SD cards in WP7 phones:
the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times.
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/
It's good to know that Sandisk cards generally have good random access speed. However, it's not guarantied. They may choose cheaper NAND any time in future.
Added: For guarantied result one may try to find ReadyBoost certified microSD, but I don't know if they exist, probably they certified only USB sticks.
Or, WP7-certified microSD cards just recently started to appear.
http://www.engadget.com/2011/04/15/windows-phone-7-certified-microsd-cards-emerge-at-atandt-stores/
Right now it's probably the same Sandisk card, just repackaged and priced higher. If I were to buy microSD to run OS from I would choose Sandisk and would hope that I'm lucky.
But WP7-certified cards could be a good choice if regular Sandisk cards suddenly become worse or if you just want to be sure, they should have good random access speed.

This is surprising to read. I've looked pretty much everywhere and the consensus has seemed to be that the Transcend 8GB, class 6 cards were top notch. Just ordered one off of Amazon too. Maybe I should just grab a Sandisk instead.