Database Develop

BottleNeck SDHC Class

I have a Class 2 right now. I know, "groan".
But i want to get a HIGHER class.
At what class number on the G1 will I hit the bottleneck of the hardware?
What I'm asking is, is 6 the highest I can go and if I go to 8 it still performs like a 6 due to the slow reader in the phone?
Or can I go up to 8 class, 10 class, etc.
Also, I need someone to confirm that a high-class SDHC (like 8 or 10) even works on this phone, 8 or 16gb kind of thing.
Thanks for your input.
I want to get some o' dem swapz in here.
jcarrz1

I used to think grabbing a higher class card would be better too, i've actually bought a class 6 4gb and a class 4 8gb card, truth is it really don't matter what class you have..
Check this thread it made me see the truth.
http://forum.xda-developers.com/showthread.php?t=1010807

I haven't really looked at class in detail
http://en.wikipedia.org/wiki/Secure_Digital#Speed_Class_Rating
I'm filling in blanks here
it seems that a card will report it's class to the reader and it is then upto the application to decide if it meets it's requirements.
without pulling apart my G1 I have not been able to determine what the controller is to see find it's specs to see if there is a limit to what it can deal with in terms of through put.
I would like to think that the bottle neck is the card, and that a higher class card would be faster
a simple way of looking at it is that even if the G1 doesn't support 10MB/s
a card which does support 10MB/s is more likely to sustain 6MB/s better than a class 6
Sorry I can't provide a real answer here
I would look at the relative cost of class 6/10
if they are not disproportionate then I would go class 10
but if class 10 is 2 or 3 times the price, I would go class 6 (unless I had cash to throw away)
dmesg
Qualcomm MSM SDCC

Thanks for your input, both of you.
Is that script to increase performance that you linked to beneficial in-rom, or just in recovery?
Does that mean that upgrading the class 2 I already have is pointless??

could someone please run a test with the app called "SD Tools" in the market (someone with class 6)
tell me what rom and what speeds you get.
I get 4.3 mb/s write and 18.5 mb/s read. That's with a class 2 8gb on cos-ds WITHOUT SWAP running. <-- idk if that makes a difference.

I think I have a Kingston class 4 (possibly 6, i'm not sure) and my max was around 5.x mb write and 19.x mb read with SD Tools. That was with 2048kb sd cache.

that's not too much better than mine, the stat i posted above was 128, i got about the same as you with 2048.
It seems like you have to make the jump to class 10 in order to get decent speeds on an android phone.
if you take out the sd card and look at it, it will say the class inside a circle directly on the card.

jcarrz1 said:
that's not too much better than mine, the stat i posted above was 128, i got about the same as you with 2048.
It seems like you have to make the jump to class 10 in order to get decent speeds on an android phone.
if you take out the sd card and look at it, it will say the class inside a circle directly on the card.
Click to expand...
Click to collapse
I have a class 4 8gb I will run a bench hear in a second...

i have a 16gb class 10 and it writes @ 5mb/s and reads 17mb/s between a class4 and a class6 but im using apps to ext and swap

I have a MT3G with a 4GB class 2 and i ran SD tool twice and saw a small speed diffrence, the first is with stock 128 cache and second i temporarily set to 1024 cache
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XmeccaX said:
I have a MT3G with a 4GB class 2 and i ran SD tool twice and saw a small speed diffrence, the first is with stock 128 cache and second i temporarily set to 1024 cache
Click to expand...
Click to collapse
run a few times and it will average out
on a few runs I get (approx)
write 6.5
read 18.5
this is a class 6
so
some class hedge bets and they are classX+
regardless of class read is the same
so for swap class matters, but you may get lucky
for apps2sd , it probably doesn't make much difference
BUT this is just one benchmark program, it could be flawed
maybe a simple script with time would be better, but then you have the memory caching etc to consider
still it is interesting so far, certainly the writes seem to fit(ish)

R3N0V4D0 said:
i have a 16gb class 10 and it writes @ 5mb/s and reads 17mb/s between a class4 and a class6 but im using apps to ext and swap
Click to expand...
Click to collapse
could be a hw limit
OR your card was just a re-badged china thing
try without swap running, and the app on internal
that could be getting in the way
the bm app writes to /mnt/sdcard/

Class 6 microSD 8gb, unknown producer (china )
Write speed = 6.5 MB/s
Read speed = 15.2 MB/s
I don't use no modified cache, no swap.
Using 2048kb cache:
Write speed = 6.3 MB/s
Read speed = 18.3 MB/s
Thanks for the cache trick
"SD Speed Increase" app is good to change cache

did i win?

R3N0V4D0 said:
did i win?
Click to expand...
Click to collapse
absolutely, yes. What SD Card???

http://www.amazon.com/gp/offer-listing/B004H8FTCK/

R3N0V4D0 said:
http://www.amazon.com/gp/offer-listing/B004H8FTCK/
Click to expand...
Click to collapse
sweet, thanks

Wrong section!
Sent from my Mytouch 1.2 using XDA Premium App!

[Q] Anyone using 32GB Micro SD in Samsung Galaxy Ace ?

Anyone using 32GB Micro SD in Samsung Galaxy Ace ?
Isn't okay ? plan to buy which class should i use Class 2 ? Class 4 or Class 10 ?
Is the Class will help to speed ?

absolutely class 10

class 10.
You open a topic in a wrong section.You even made another topic on the SGA general forums.Please be patient until someone reply on your topic/post.

sametpoyraz -Thanks but Class 10 can support or not ? for My SGA ? did you tested before ?
princenoob -Sorry i am new here so i will take note next time. btw did you tested before ? it's work ?

princenoob said:
class 10.
You open a topic in a wrong section.You even made another topic on the SGA general forums.Please be patient until someone reply on your topic/post.
Click to expand...
Click to collapse
princenoob -Sorry i am new here so i will take note next time. btw did you tested before ? it's work ?

sametpoyraz said:
absolutely class 10
Click to expand...
Click to collapse
sametpoyraz -Thanks but Class 10 can support or not ? for My SGA ? did you tested before ?

Guys does the Ace support MicroSD cards of Class 10 ? ?
Is anyone using it here ??
Sent from my Galaxy Ace using XDA App

sbchua said:
Anyone using 32GB Micro SD in Samsung Galaxy Ace ?
Isn't okay ?
Click to expand...
Click to collapse
sid_gamer said:
Guys does the Ace support MicroSD cards of Class 10 ? ?
Is anyone using it here ??
Click to expand...
Click to collapse
I'm using Adata microSDHC class 10 32GB card.
No problems.

Im using a PNY class 10 16gb and absolutely no problems.
Saying that I bought my card from play.com and thier play.com card got bad reviews with low read/write speeds. It might be an idea to post about a specific brand of card and see what response you get.

can I use microSDHC in my ace???
I am planning to buy Transcend 8gb mircrosdHC class 10 card. Please reply me asap!

I saw your post and was intrigued by your question - I then did the search and found this page.
http://en.wikipedia.org/wiki/Secure_Digital
It would seem the microsdHC just refers to the size of cards i.e. from from 4Gb to 32Gb.
Now as to your request - I have used transcend cards in other equipment - notably a JVC HD 1080p camcorder and their sustained write capability is very very good with no drop out with over 240 hours of HD recordings. So brand wise - it is a very good name and IMHO a good rep.
As to your card running ok with the ace - the fact it is a good branded name and a reasonable size but more importantly a class 10 - then in all probability you will not have any problems.

thnx a lot for the info!!
Just placed my order!

adwaitk007 said:
can I use microSDHC in my ace???
I am planning to buy Transcend 8gb mircrosdHC class 10 card. Please reply me asap!
Click to expand...
Click to collapse
Yes. I'm running a C2 Samsung 8GB MSDHC card right now with no problems.

Thanks alot for the info regarding the Sd card guys, now i can order a card...
Sent from my Galaxy Ace using XDA App

adwaitk007 said:
can I use microSDHC in my ace???
I am planning to buy Transcend 8gb mircrosdHC class 10 card. Please reply me asap!
Click to expand...
Click to collapse
Will working fine. since i am using 16GB microSDHC Class 10 is working fine. cannot be you using the 8GB microSDHC is not working.
http://patriotmemory.com/products/g...roupid=78&prodline=4&group=microSDHC&catid=88

Great
keekooceeaou said:
I'm using Adata microSDHC class 10 32GB card.
No problems.
Click to expand...
Click to collapse
I didn't know
I was gessing if the galaxy ace is fast enough to read fast all 32gb of music or it takes kindda long time to read those all mp3's
so it's about memory class?
or it also depends of the cellphone speed?

hi have sandisk 16gb class 4

Somewhere i saw that since our device is not that fast, class 6 card would perform well than a class 10 card. cos it takes time to start the class 10 card even though it has faster speed.

What do you think about Samsung's class 10 32 GB cards?
Sent from my GT-S5830 using XDA App

Just bought an ADATA microSD class 4 32GB.
Speed: 4,3 MB/s WRITE - 16,4 MB/s READ
Not the fastest, but there is plenty room for videos and music now.
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Top of the line SanDisk Extreme Pro® microSDHC™ UHS-I

SanDisk Extreme Pro.
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-Fastest transfer speed at 95MB/s*
Up to 95MB/s (633X) read speed. Write speed up to 90MB/s (600X).
Based on internal testing; performance may be lower depending on host device. 1 megabyte (MB) = 1 million bytes.
** 1 gigabyte (GB) = 1 billion bytes
-Featuring Class 10 for "3D" and Full HD† video (1080p)
-Engineered with UHS-I bus architecture
Does anyone have it?

If you don't plan to transfer content to that card with a usb-3 connection and a reader connected directly to the computer, it doesn't have sense to buy it.
The note it is limited to about 15mb transfer rate, so you will be throwing money out of the window.

kersh said:
If you don't plan to transfer content to that card with a usb-3 connection and a reader connected directly to the computer, it doesn't have sense to buy it.
The note it is limited to about 15mb transfer rate, so you will be throwing money out of the window.
Click to expand...
Click to collapse
Do you have a reference for that info? I plan to pickup a note 2 upon US release and was debating on waiting for the new Samsung high speed micro sd cards or going with Sandisk Ultra.
Daniel

You really won't see much of a difference between the Gold and Ultra cards. The important aspect of those cards are the read speeds and it's absolutely overboard for a phone. Save yourself some money and just get the Ultra w/30mb read and you'll be set. No need for anything faster.
Sent from my GT-N7100 using Tapatalk 2

Yeah, just spend that money on the 64GB version of the Note II. I bet the flash chips they use in the note are just as fast, without the bottleneck of MicroSD connections.

yumcax said:
Yeah, just spend that money on the 64GB version of the Note II. I bet the flash chips they use in the note are just as fast, without the bottleneck of MicroSD connections.
Click to expand...
Click to collapse
I agree that the internal memory would be superior. The problem is that it is very unlikely 32GB and 64GB models will be available upon US release or even within a few months.
Daniel

Sent from my GT-N7100 using xda premium

kastafela said:
View attachment 1390688
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
agreed. The Ultra card (30mb/sec) is the absolute fastest card you will need for a phone. You won't even take full advantage of its speed but it's a hell of a lot cheaper than the Gold.
The only thing that will take advantage of write speeds when using the phone is how fast you take pictures and transfer files to the card from a computer. THAT'S IT. And technically even with that you will be limited to around the same speeds as the average USB 2.0 speed which is normally between 10mb-25mb/sec.
Don't waste your money.

The problem is many people just see whats stated on the package, and don't realize that to obtain the stated speed, you need the unit to support UHS I, and at present no phones support it, so the max speed for the card is read 25mb/s and write 24mb/s, which is the standard for micro sdhc and micro sdxc noted as the class 2, 4, 6 and 10.

Got the 64gb uhs I class 10 works fine write 11MB read 38MB second.

Where can I get a good deal on the Ultra 32 or 64. I know they can be much cheaper online instead of in stores.
Sent from my Classic EVO 4g

rydehard86 said:
Where can I get a good deal on the Ultra 32 or 64. I know they can be much cheaper online instead of in stores.
Sent from my Classic EVO 4g
Click to expand...
Click to collapse
I payed 59.99 a few days ago on eBay for a new 64gb ultra class 10.
sent from my future SPH-L900

Wherever you buy from make sure its an authorized dealer, if not no warranty and you are likely to get a counterfeit which won't have the specified performance. I like buying from amazon, but make sure amazon.com is the seller.
http://www.amazon.com/SanDisk-micro...350601208&sr=1-1&keywords=micro+sd+ultra+64gb
Daniel

At the time of this posting amazon.com was sold out of the sandisk 64gb ultra. Ordered one from newegg(authorized reseller) for $62.

Excellent deal here on the 64GB
Here's a good deal on the 64GB Ultra on Amazon
http://www.amazon.com/SanDisk-MicroSDXC-Memory-Adapter-SDSDQU-064G-AFFP-A/dp/B009QZH6JS/ref=lh_ni_t

kersh said:
If you don't plan to transfer content to that card with a usb-3 connection and a reader connected directly to the computer, it doesn't have sense to buy it.
The note it is limited to about 15mb transfer rate, so you will be throwing money out of the window.
Click to expand...
Click to collapse
you can use Class 10 cards in Note as the support reffered to me

Kaiser Chief said:
Got the 64gb uhs I class 10 works fine write 11MB read 38MB second.
Click to expand...
Click to collapse
Yesterday I bought this micro sd, and had a great problem. On next Monday I will send to the shop.

Your problem may be the fact that it isn't formatted correctly out of the box for your phone.
Sent from my GT-N7100

I ordered the 64 gb one that is linked above. Anyone have problems with the phone formatting it when inserted? I am running a custom ROM, and have seen a few posts on the forums with people having trouble getting it recognized and formatted correctly. Was hoping someone knew a good way to format it ahead of time in preparation of installing into the phone. Like a third party pc tool for example maybe?
Sent from my SGH-T889 using Tapatalk 2

Gack69 said:
I ordered the 64 gb one that is linked above. Anyone have problems with the phone formatting it when inserted? I am running a custom ROM, and have seen a few posts on the forums with people having trouble getting it recognized and formatted correctly. Was hoping someone knew a good way to format it ahead of time in preparation of installing into the phone. Like a third party pc tool for example maybe?
Sent from my SGH-T889 using Tapatalk 2
Click to expand...
Click to collapse
Your problem is the custom rom. Same thing happened to me. I wasn't able to format it until I went stock. To avoid having to go to stock, format it with a PC.
Sent from my SGH-T889 using xda premium

Micro SD 64 SDXC vs OTHER

The better choice for micro sd .
SanDisk SDHC
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Samsung SDHC
SanDisk SDXC
Source: Blog

SDHC
The Secure Digital High Capacity (SDHC) format, defined in Version 2.0 of the SD specification, supports cards with capacities up to 32 GB.
Host devices that accept SDHC cards are required to accept SDSC cards.[1] However, host devices designed for SDSC do not recognize SDHC or SDXC memory cards, although some devices can do so through a firmware upgrade.
Click to expand...
Click to collapse
SDXC
The Secure Digital eXtended Capacity (SDXC) format supports cards up to 2 TB (2048 GB), compared to a limit of 32 GB for SDHC cards in the SD 2.0 specification....
Compatibility with SDHC
SDXC host devices accept all previous families of SD memory cards.[26] Conversely, SDHC host devices will accept SDXC cards that follow Version 3.0, since the interface is identical,[3] but the following issues may affect usability:
SDXC cards are pre-formatted with Microsoft's proprietary and patented exFAT file system, which the host device might not support. Since Microsoft does not publish the specifications of exFAT and its use requires a non-free license, many alternative or older operating systems do not support exFAT for technical or legal reasons. The use of exFAT on some SDXC cards may render SDXC unsuitable as a universal exchange medium, as an SDXC card that uses exFAT would not be usable in all host devices. Since the FAT32 file system supports volumes up to the SDXC's maximum theoretical capacity of 2 TB as well, a user could reformat an SDXC card to use FAT32 for greater portability between computers (see below). FAT32-formatted SDXC cards can be used in a host device built for SDHC if the host device can handle 64 GB and larger volumes.
SDHC host devices will not test the new capability bits defined for SDXC 4.0 cards. It will therefore not be able to use the new features of SDXC, such as transfer speeds above UHS104 (104 MB/s).
Click to expand...
Click to collapse
Speed Class Rating
32 GB SDHC card
The SD Association defines standard speed classes indicating minimum performance to record video. Both read and write speeds must exceed the specified value. These are defined in terms of suitability for different applications:[39]
Class 2 for SD video recording
Class 4 and 6 for HD ~ Full HD video recording,
Class 10 for Full HD video recording and HD still consecutive recording
UHS Speed Class 1 for real-time broadcasts and large-size HD videos
Click to expand...
Click to collapse
The specification defines these classes in terms of performance curves which translate into the following minimum performance levels, for both read and write, on an empty card:
Class 2= 2 MB/sec
Class 4= 4 MB/sec
Class 6= 6 MB/sec
Class 10≥ 10 MB/sec
Speed Classes 2, 4, and 6 assert that the card supports the respective number of megabytes per second as a minimum sustained write speed for a card in a fragmented state. Class 10 asserts that the card supports 10 MB/s as a minimum non-fragmented sequential write speed.[40]
Click to expand...
Click to collapse
and here is some info on UHS-I BUT NO CURRENT PHONE AT THIS TIME SUPPORT THIS.
UHS Speed Class
The Ultra-High Speed (UHS) designation is available on some SDHC and SDXC cards.[42] The following ultra-high speeds are specified:
UHS-I cards, specified in SD Version 3.01,[40] support a clock frequency of 100 MHz (a quadrupling of the original "Default Speed"), which in four-bit transfer mode could transfer 50 MB/s. UHS-I cards declared as UHS104 also support a clock frequency of 208 MHz, which could transfer 104 MB/s. UHS-I is the only class for which products are currently available.[43]
Click to expand...
Click to collapse
for a video explanation Lucidmike78 does an excellent job.

imon22s said:
and here is some info on UHS-I BUT NO CURRENT PHONE AT THIS TIME SUPPORT THIS.
for a video explanation Lucidmike78 does an excellent job.
Click to expand...
Click to collapse
The app that this guy uses is old, it is no updates from 2011 in the Google Play Store. This app is better for the new technologies

Galaxy Note 4 microSD Card Thread

Hi,
Speed tests and performance.
Which works, which doesn't.
Tools.
Recommendations.
...
I assume Note4 will handle any SD card we will throw at it. But I bet there better ones and worse ones.
Sent from my SM-N910C using Tapatalk

I have samsung sd evo 64gb. Works really well. Fast and no errors yet. My past sandisk on my note 2 gave me errors and loss data
Sent from my SM-N910U using Tapatalk

What sd cards are recommended? Class 10 and above?
Jist wondering if the phone would utilize super high speed cards or Class10 is more than enough?
Sent from my SM-N910C using Tapatalk

bladefrost007 said:
I have samsung sd evo 64gb. Works really well. Fast and no errors yet. My past sandisk on my note 2 gave me errors and loss data
Sent from my SM-N910U using Tapatalk
Click to expand...
Click to collapse
Well I guess it depends on SD card. I only heard positive reviews of Sandisk flash memory.
Sent from my SM-N910C using Tapatalk

bat0nas said:
Well I guess it depends on SD card. I only heard positive reviews of Sandisk flash memory.
Sent from my SM-N910C using Tapatalk
Click to expand...
Click to collapse
You should read more reviews......Sandisk are slow and over priced.......

Mine gave me about 40MBps average write speed
Sent from my SM-N910U using Tapatalk

Joey2o11 said:
You should read more reviews......Sandisk are slow and over priced.......
Click to expand...
Click to collapse
It really depends on what model you buy for your needs all manufacturers make slow and fast ones. I agree that Sandisk is overpriced on their MSRP but if you shop around, look for deals & price match you will get high quality for a fair price.
I just picked up a 64GB Sandisk Extreme Plus yesterday price matched down to $66.99 CAD, it has up to 80MB/s read and 50MB/s write capabilities and on my Note 4 and it did this:
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I am quite please with its performance.

Sony microSD cards and memory sticks for up to 83% off on Amazon
http://www.androidauthority.com/sony-microsd-card-discount-deal-amazon-566039/

Subscribed. Currently using the SanDisk 32gig class 10 card. Not bad. Ordered the 64 gig Samsung evo class 10 for $36 off Amazon with free shipping.
---------- Post added at 02:36 PM ---------- Previous post was at 02:34 PM ----------
Also can write, transfer, copy and paste to sd card using the stock file manager of the note 4. I've unmounted and mounted with great results. No broken icon image.

What cards are supported?
I assume all?
microSD
microSDHC
microSDXC
And what about speed classes? Both: Class 10 and UHS-1?
The question is: will all of them work and if yes then what max read write speed can Note 4 utilize?

Samsung 32gb evo and all is well.

bat0nas said:
What cards are supported?
I assume all?
microSD
microSDHC
microSDXC
And what about speed classes? Both: Class 10 and UHS-1?
The question is: will all of them work and if yes then what max read write speed can Note 4 utilize?
Click to expand...
Click to collapse
All of them will work.
Maximum speed is utterly dependant on the card. I'm not sure what the theoretical maximum speed the phone could handle, but I'm sure that the card itself will be the limiting factor, not the phone.

bladefrost007 said:
I have samsung sd evo 64gb. Works really well. Fast and no errors yet. My past sandisk on my note 2 gave me errors and loss data
Sent from my SM-N910U using Tapatalk
Click to expand...
Click to collapse
Got the same thing. Working with no problems so far. As for speeds, I've never paid too much attention to the speeds of sd cards, so I couldn't give any specifics.

I've purchased the Samsung 64gb Pro card from Amazon and looking forward to using it.
It's supposedly one of the fastest.
Sent from my SM-T800

Got the Samsung 64gb Evo in mine. Not ran any speed tests...but works all good.

lukepw said:
Got the Samsung 64gb Evo in mine. Not ran any speed tests...but works all good.
Click to expand...
Click to collapse
Do you record your 4K videos to SD card?
Could you run any SD benchmark with your EVO?
I read some reviews on the net and seems that EVO should be more than enough for normal Note 4 operation (recording videos, watching huge fullhd movies from mkv files).

SanDisk extreme 128 Gb SDXC
READ 72 MB/ SEC.
WRITE 50 MB/SEC
Recording 4K videos flawlessly.

Kakomanda said:
SanDisk extreme 128 Gb SDXC
READ 72 MB/ SEC.
WRITE 50 MB/SEC
Recording 4K videos flawlessly.
Click to expand...
Click to collapse
What app did you use to test the speed?

bat0nas said:
What app did you use to test the speed?
Click to expand...
Click to collapse
A1 SD bench

Would anybody mind to test 32 or 64GB EVO card?
1) Perform a 4K video recording to your SD card.
2) Perform a speed test with any of the test app inside your phone.
Thanks!!
I really have some doubts because this site http://thewirecutter.com/reviews/best-microsd-card/ says that for 4K recording something faster is needed than EVO.
But on the other hand: 4K recording requires only 6MB/s of sequential writing and EVO can handle up to 19MB/s (at lease every review claims that).
Thanks!!!