Database Develop

Which SD is the best?

Hi!
First, what is class 2 and class 6? Which is the best 2 or 6 in this case?
And which one of these two is the best:
Nokia MU 43 8 Gb MicroSDHC-11
or
Transcend microSDHC 8GB (Class 2) (TS8GUSDHC2)
- Class 2 specifikation - Support för Error Correcting Code (ECC)

Class mainly refers to read/write speed of the SD Card, the better the class the faster will be the data transfer speed but be careful with class 6 or class 8 cards on higher end memory like 8GB, 16GB or 32GB that has more tendency to give error. Class 4 is your best bet.

yusufjee said:
Class mainly refers to read/write speed of the SD Card, the better the class the faster will be the data transfer speed but be careful with class 6 or class 8 cards on higher end memory like 8GB, 16GB or 32GB that has more tendency to give error. Class 4 is your best bet.
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Hi! And thanks!
I did go with the:
Kingston Micro SDHC Kort (TransFlash) - 8GB...
Kingston kort (TransFlash) - 8GB Class 4 - inkl. adapter. - SDHC kompatibel - Read-/write hastighet 58x (8,8 MB / s) / 45X (6,5 MB / s)
Hope this is better than the one i had, did not know about classes at all.

if you are installing and running thing of the SD always go for the higher class card.

I have a class 6, 16GB SanDisk which I have had since they
were first available.
I have had no problems with it from day 1.
​

tkalli said:
I have a class 6, 16GB SanDisk which I have had since they
were first available.
I have had no problems with it from day 1.
​
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I cannot find a 16gb sandisk class 6 anywhere. I can't even find a class 6 microsd sandisk period. Where did you find it?

jas0nw0ng said:
I cannot find a 16gb sandisk class 6 anywhere. I can't even find a class 6 microsd sandisk period. Where did you find it?
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Sorry, it is a Transcend 16GB Class 6.
The Sandisk 16GB in other phone is a class 2.
​

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 though 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??

you formatted it 1000 times ?
btw i use a class 4 8gb and no problem except it sometime cannot boot android, i dunno if its the sd problem or android problem

[Q] Which SD card is best fast read or fast write?

I just got a Nook Color and rooted it with Autonooter 3.0
Everything works great. I'm thinking of trying Froyo or Honeycomb on a SD card.
I want to ask which SD card would work best.
Reading through the forums, I have found there are some conflicting information.
On the one hand people recommend Class 6 or higher cards.
On the other hand a number of posters have reported using a class 2 Sandisk card and got good performance.
Since the classification of SD cards only refers to the writing speed, a lower class card may have higher reading speeds than a higher class card. I 'm wondering which is most important for running Froyo/HC on Nook Color, a higher reading speed or a higher writing speed?
For reference here are some benchmarks I found on Amazon.
It appears this Sandisk class 2 card have reading speeds of up to 18MB/s, and writing speeds of up to 6MB/s
[SanDisk 16 GB microSDHC Flash Memory Card SDSDQ-016G (Bulk Packaging)]
This class 6 Transcend card have reading speeds of up to 15MB/s, and writing speeds of up to 11 MB/s.
[Transcend 8 GB microSDHC Class 6 Flash Memory Card TS8GUSDHC6E]

Here's more info for you:
http://forum.xda-developers.com/newreply.php?do=newreply&noquote=1&p=12000938

I have an 8 gig class 6 transcend in my fascinate, and a 16 gig class 6 transcend in my NC running CM7. I have a season of an anime I'm watching with Rockplayer on my morning metro ride. Both transcend cards have been great. I have two 16gb Sandisk class 2 cards. One is my "fast one" that's at least as fast as the transcend cards. One is my "slow one" that is unbearably slow for things like transferring a season of anime for watching later with rockplayer. I also have a 16gb samsung class 2 that has performance that mirrors the "slow" sandisk class 2. If I had to get another card right now, I'd probably get another transcend class 6. I've also heard great things about patriot brand, but I can neither confirm or deny those things from personal experience.

Which microSD card is the MOST STABLE and FASTEST for using HoneyComb in SD card?

So I finally got HoneyComb working on my Nook Color (NC), residing in the microSD card using a Kingston 8GB Class 4. However, this card seems to be one of the slowest and using the HC in NC is almost unusable.
Example:
- Screen rotation takes 3-5 seconds
- Opening new app, depending on which app, can take 1-5 seconds
- Browsing certain website can make the screen unresponsive
- etc..etc..
I know that the HC version available in this website is probably still in "preview" or beta stage and some slowdown is expected, but I am not expecting it to be THIS bad. So I think the culprit is the microSD card itself.
However, I have tried many different MicroSD card and none works. I.e. it gives the "decrypt storage" error when booting up the NC. The cards I have tried are:
- Patriot 16GB Class 10
- A-Data 16GB Class 10
- Kingston 8GB Class 6
The ONLY one that works so far is Sandisk. Unfortunately, from SanDisk website, I do NOT SEE ANY card higher than Class 4.
Thus, can you recommend which is the MOST STABLE and FASTEST card? I.e. the ones that did NOT give slowdown per the examples I have given above.

i'm using sandisk 4 GB class 4 HC
nookie froyo, runs fantastic.
Class 10 cards apparently dont do too well. lots of people have had issues with those. class 6 should be OK, class 2 and 4 workk very nice.

Do you have recommendation for a good Class 6 MicroSD card? SanDisk don't sell anything higher than Class 4. I tried Kingston Class 6 and my Nook Color just spit on it...

lanwarrior said:
Do you have recommendation for a good Class 6 MicroSD card? SanDisk don't sell anything higher than Class 4. I tried Kingston Class 6 and my Nook Color just spit on it...
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I am currently running trancend 8gb class 6. Havent had any issues with froyo, HC or Cm7 booting or running.

I'm using a A-Data Class 6 16Gb card with no trouble. I do have 2 Kingston Class 4 32Gb cards and they have the issue with the decrypt garbage when you try to boot up HC from the sdcard. I've also got a Class 10 32Gb Wintec card which I have not had time to test out yet as I just got it the other day.

After a failed Kingston 16gb class 10, I got a SanDisk 8gb Class 4 and it's speedy enough. I notice very minimal slow down on some menus but I don't know if that's just the OS itself (being a preview after all)

danootz said:
After a failed Kingston 16gb class 10, I got a SanDisk 8gb Class 4 and it's speedy enough. I notice very minimal slow down on some menus but I don't know if that's just the OS itself (being a preview after all)
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That's the exact same card I have, and you did NOT experiences any of the slowness I posted in my 1st thread?

How drastic is the difference between Class 2 and Class 4?
I know that it says that it processes twice as fast, but is it noticeable? Can somebody give an example of when you can actually tell the difference? Playing music, watching movies, booting from microsd?

I have a Sansdisk class 2 8gb card that performs just as well as my class 10 Patriot 8gb (which has booted both HC and currently used as storage for my eMMC CM7 install.)
Sansdisk severely underrates their SD's and many other manufacturers overrate theirs. It is not a perfect rating system.
I would recommend going w/ sansdisk in whatever size you can afford. Class 2/4 will be plenty fast.

Before I switched back to Froyo I was running off the SanDisk 8Gb card from BestBuy - $20 - which I found very responsive. I think it is Class 4, but I could see any label on the card itself or the package.
The SD card speed was not the reason I switched back, it was the lack of other features in HC preview. I can't wait for an AOSP release

8GB Cards
I currently have 2 8GB microsds that I switch between:
-Transcend 8GB Class 6 running Honeycomb from Amazon. Tested it with h2wtest and got 16MB/s write and 14MB/s read. (Not sure if that is a typo on the tool or not and it's supposed to be bits instead of bytes, but that's what it says).
-Sandisk 8GB Class 2 running Nookie Froyo. Tested at 14MB/s write and 18MB/s read.
Both cards run their respective ROMs well, so it seems to jibe with what chisleu said about Sandisk underrating their cards. I could also be limited by the USB adapter I was using, but I had another adapter that was limiting it to 4MB/s both ways.

[Q] SD max speed?

Does anyone know if there is a limit to speed of the HD2 microSDHC slot? That is, will I see much difference between a class 6 and a class 10?
Thanks!

SDSDQY-016G-U46 - as far as I know this is best card for HD2 so far
HD2 is not working best on class 10
class 6 is OK but still won't find better than SDSDQY-016G-U46 <- class 4 card
but it is not the same as normal Sandisk class 4
Cheers man

I'm going to find out in a week or two. I got impatient and ordered a PNY 16GB Class 10 MicroSDHC for Tablets from Costco (model P-SDU16G10TEFS2). They rate it as 15MB/s write and 20MB/s read. I thought my 8GB class 6 Sandisk Ultra SDSDQY-8192-A11M would be slow (due to being 2.5 years old), but I just benched it using SD tools and got 12MB/s write and 23.7MB/s read (go figure).

[Q] Which SD card to get (class)

I want to change my 2gb SD card for an 8 or 16 gb one. Which one should I get? Should I go for a class 4 or 6, or is class 2 enough?

Get class 6. Class 6 SD cards are fast and if you're intrested, you may use multiboot with that card.

Well better card class better performance on sd...such like apps2sd and if u use a multiboot..but i think there is no specfial need for extra high speed card...
well at least 6th card class u would need!
personally i have 8gb 10 class card atm!

I don't think I can easily find class 8+ cards here. What about this one? I can't find which class it is?: http://www.sandisk.com/products/mobile-memory-products/sandisk-microsdhc

Dexter_prog said:
I don't think I can easily find class 8+ cards here. What about this one? I can't find which class it is?: http://www.sandisk.com/products/mobile-memory-products/sandisk-microsdhc
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I use a lexar micro sdhc 16gb 6 class
I bought from ebay de 35 euros its the original and I have 10 years guarantee
Check it..