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I originally had an 8gb class 4 card and when transferring files between my Nexus and PC I noted speeds of up to around 3mb per second.
I recently invested in a 16gb class 6, but now when I transfer files I am very lucky to even reach 1mb per second. This card is incredibly slow, is this right? I thought class 6 were supposed to be at around 6mb's per second?
strange that the speed is less that the class 4 sd, but u cud confirm the card transfer speed using a card reader
but in any case, you shud note that the phone limits the transfer speeds so u mite never get the full transfer speed of a class 6 card...
Oh, I did not know that the phone would limit the speeds, still, it does seem strange that the speed is less than my class 4.
I shall do what you suggested and try and get hold of an adapter to use my card reader
dannstarr said:
I originally had an 8gb class 4 card and when transferring files between my Nexus and PC I noted speeds of up to around 3mb per second.
I recently invested in a 16gb class 6, but now when I transfer files I am very lucky to even reach 1mb per second. This card is incredibly slow, is this right? I thought class 6 were supposed to be at around 6mb's per second?
Click to expand...
Click to collapse
Where did you buy this card from. If it was off ebay, then it could be a fake & that would explain the 1mb transfer speed.
I recently bought a Kingmax 16GB Class6 microSD card. While I was initially transferring my files from my Sandisk 8GB Class2 microSD card, I noticed that the transfer rate was kind of slow, so I decided to do some benchmarking.
Software: CrystalDiskMark 3.0
3 different microSD cards using same USB card reader
Card #1 - Sandisk 8GB C2
Card #2 - Kingston 8GB C4
Card #3 - Kingmax 16GB C6 (new one that I just bought)
Here are the results (Seq Read; Seq Write; Random Read; Random Write):
Card #1: 17.08MB/s; 5.13MB/s; 17.09MB/s; 1.05MB/s
Card #2: 17.23MB/s; 9.53MB/s; 17.23MB/s; 1.92MB/s
Card #3: 16.05MB/s; 5.22MB/s; 16.73MB/s; 1.02MB/s
Summary: My new Class6 card was about the same speed as my Class2 card.
I approached the vendor and they tested a few other Kingmax card that they had in stock... all cards were reportedly about the same speed as the one they sent me. They swear that it's not fake. Maybe its a bad batch of cards but somthing is weird/wrong. Anyways... I'm sending my card back for a refund. I am going to stick to my Kingston Class4 card now.
1MB/sec can be indicative of USB 1 speeds, is OP sure that its connecting @ USB 2?
The class is supposed to be the minimum write speed, and I assume that to be sequential.
>Kingston
isn't that ring the bell? I mean they are pretty expensive....
I think if you go beyond certain level of quility, the pay off of such c/p ratio will get narrowed and you can't tell difference......
either go dirt cheap or go super HD expensive, middle is kind of "uh they are more expensive than dirt cheap but not even close to those expensive things....."
like my AMD vs INTEL war, cheapest AMD almost always beat middle/low Intel by cost + performance, or just go get best INTEL and enjoy the hell out of it.
happy new year
Hi guys ... So recently I purchased this 16 GB micro SDHC card for my new Android phone:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220524
The problem is that I'm not getting the 4 MB/sec write rate that this card promises ... I tried low level formatting it with this tool:
http://hddguru.com/software/2006.04.12-HDD-Low-Level-Format-Tool/
.... but the write-rate is still the same .. Both before and after trying to low level format the card, I'm getting a write-rate of about 0.9 MB/sec ~ 1.0 MB/sec ...
Other people who have purchased this card from Newegg have said in their feedback that they can at least achieve 3 MB/sec or something, and I'm not even close to that .. Am I doing something wrong ?
It depends on what the card is being used on. With a cheap multi card reader, you're going tto get low speeds. I get around 5 when it is plugged into my phone.
Captivate 2.2.1 OCed
Atrix Root
Nexus 1 2.3.3
WELL,you mean you get only 0.9MB/S to 1.0MB/S with your micro SDHC card plugged into a card reader?if so ,just read the guy above,it is almost the reason .if not maybe it's inferior,you should ask NEWEGG for service...
What are you using to benchmark it? And what hardware are you putting it into (what he said)?
I have a class 6 8GB. On my Android I used an app called SD Tools and another called Antutu System Benchmark on my card as-is (not freshly formatted.) I get around 5MB/s write and 11MB/s read. (Appbrain has the apps.)
Tonight I used HD Tune Pro on my PC (trialware) through a USB adapter. I got better results on the PC. I have noticed that the software makes a big difference. HD Tune seems to be the most respected on the net. I got 12.3MB/s read min -- 14.3MB/s max. Write was around 6 min/8 max in the File Benchmark tab (didn't want to reformat my card to test write speeds.)
Use a high quality reader. I don't know the specs on these but mine boots Linux and Windows OK and always tests at max speeds with my cards. It is a full-sized USB stick reader with a mini-sd adapter.
Update: I got very different results when the cards were formatted by different systems though. My class 2 card formatted with Nokia phone got 18MB/s read, but my class 4 formatted by my PC for booting got 6MB/s min and 14 max. All with HD tune in same card reader. All fat32. WTF??
I wonder if these programs are testing the first partition, which would be the boot partition on my class 2 card. Something strange going on.
I'm using the microSD -> SD adapter which came with the microSD card itself, and then putting this SD adapter into my laptops builtin card reader ... Is there any problem with this setup ?
Any hints on this people ?
Hi folks,
I recently purchased a Lexar Class 10 32GB card for my HTC Desire. In case anyone else was considering the same card, I've written down my experiences with it, such as they are. I've not had it long enough to give any long-term feedback, but I'll update this thread if I encounter any long-term issues with it.
I've also posted this review in play.com but will take a while for it go through their review system.
---
Price: I have been keeping track of this particular Micro SDHC card for a while and when the price dipped to 54.99GBP I took the opportunity to purchase it. Since then I notice that the price has gone up again, so it was a timely purchase.
Delivery: Ordering and delivery was smoothless (ordered on 22/03/2011 and arrived on the doorstep on 28/03/2001).
Usage: I already have a 16GB card in my HTC Desire and required more memory. The Class 10 speed was not a strict requirement, but makes data transfer much faster. There are no compatibility issues with the HTC Desire and am happily using the card at the moment. For those who like to root the phone and so such things, I've partitioned the card using ROM Manager and am currently using Oxygen 2.0.1 with an sd-ext partition and there are no problems using the card.
Data transfer speed: I used h2testw v1.4 to test the card and the results are given below:
Warning: Only 30522 of 30523 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 10.3 MByte/s
Reading speed: 16.1 MByte/s
H2testw v1.4
For what it's worth I used the Micro SDHC card reader that came with the card on my laptop, which is running Windows Vista. As you can see, the write speed matches the Class 10 specification.
I was not able to achieve the same write speed then writing the contents of the old card (which was first copied to my laptop) to the new card using the card reader on the laptop. I only achieved around 5MByte/s, or thereabouts. This is probably due to the smaller file sizes compared with the file sizes used by h2testw.
Hope this helps.
...and it would be interesting to see it acting here.
How fast does it read using the SD Card reading speed fix?
rootrider said:
...and it would be interesting to see it acting here.
Click to expand...
Click to collapse
Thanks for the URL. I'll have a play with it in the weekend and check the speeds.
I got mine too, got around the same results as above. I should do a review soon!
Opinions
Since there are no more reviews on this...guys who bought this card, could you please post how it behaves with the phone?.
Have you noticed any changes like:
- faster video playback
- no lag while recording 720p video
- games and apps loading faster
I'm really considering buying this card, but judging the Amazon reviews the transfer speed for some users is lower than with a class 6 card.
Thanks
32GB? i thought Desires could only read SD cards up to 16GB?
No, I have a 32GB fitted with no probs (yet!).
I'm not a speed merchant, but do not notice any issues.
isaruku said:
Since there are no more reviews on this...guys who bought this card, could you please post how it behaves with the phone?.
Have you noticed any changes like:
- faster video playback
- no lag while recording 720p video
- games and apps loading faster
I'm really considering buying this card, but judging the Amazon reviews the transfer speed for some users is lower than with a class 6 card.
Thanks
Click to expand...
Click to collapse
Everything is smoother for me. I get ~10MB/s write speeds.
I yaw class 6 and get 7 mb/s
Sent from my HTC Desire using XDA Premium App
...got this card yesterday...
...I'm currently running RCMixHD V3.6.1 ROT D2EXT rom on it, partitioned FAT32+EXT4+EXT4+Linux Swap as specified by the requirements of the rom.
Due to the nature of the D2EXT rom running entirely from the EXT & swap partitions off of the SD card, a slow 'lower class' sd card will end up creating a performance hit on the phone.
However, I can confirm that after using it for 12 hours... the D2EXT rom is running very fast and stable on this SD card.
In fact, I would go far as to say the rom running faster than its optimised DATA++ variant.
Thanks to this SD card, I now have a rom that basically has the speed and stability of DATA++ roms but with the added bonus of having over 1GB internal phone memory courtesy of D2EXT... ^_^
I thoroughly recommend this SD card if you can get it... and install Robocik's D2EXT rom on it.. ^_~
have this card as well with my miui rom D2EXT. runs a treat, games have no slow downs.
got the same speeds as been mentioned already here. Def a step in the right direction i say.
I trying to get good speeds with sdhc class 10 micro card.
with stock froyo I get 10 write and 8 read speed.
after patching the fix "kernel_2.6.32-frankoid" the write speed is go down to 7-8
but the read speed is incrased to about 20 with I mesured with sd tools program
But when i conect phone to pc write is max 5 and read max 14.
How to incrase more the write speed?
Or what kerner is the best for it? With stock froyo I get write 10 but the reed speed was 8 how to keep 10 but change the read to 20
dsana123 said:
Hi folks,
I recently purchased a Lexar Class 10 32GB card for my HTC Desire. In case anyone else was considering the same card, I've written down my experiences with it, such as they are. I've not had it long enough to give any long-term feedback, but I'll update this thread if I encounter any long-term issues with it.
I've also posted this review in play.com but will take a while for it go through their review system.
---
Price: I have been keeping track of this particular Micro SDHC card for a while and when the price dipped to 54.99GBP I took the opportunity to purchase it. Since then I notice that the price has gone up again, so it was a timely purchase.
Delivery: Ordering and delivery was smoothless (ordered on 22/03/2011 and arrived on the doorstep on 28/03/2001).
Usage: I already have a 16GB card in my HTC Desire and required more memory. The Class 10 speed was not a strict requirement, but makes data transfer much faster. There are no compatibility issues with the HTC Desire and am happily using the card at the moment. For those who like to root the phone and so such things, I've partitioned the card using ROM Manager and am currently using Oxygen 2.0.1 with an sd-ext partition and there are no problems using the card.
Data transfer speed: I used h2testw v1.4 to test the card and the results are given below:
Warning: Only 30522 of 30523 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 10.3 MByte/s
Reading speed: 16.1 MByte/s
H2testw v1.4
For what it's worth I used the Micro SDHC card reader that came with the card on my laptop, which is running Windows Vista. As you can see, the write speed matches the Class 10 specification.
I was not able to achieve the same write speed then writing the contents of the old card (which was first copied to my laptop) to the new card using the card reader on the laptop. I only achieved around 5MByte/s, or thereabouts. This is probably due to the smaller file sizes compared with the file sizes used by h2testw.
Hope this helps.
Click to expand...
Click to collapse
I bought a mustang 32gb microsdhc class 10 card, that am not satisfied with.
It say it will do minium 10mb/s but it does minium 8mb/s
and at max it dosent even go over 10mb/s
While i bought an A-Data microsdhc class 6 that mostly write at 10mb/s
I have a Desire HD and recently started using Lexar 32gb Class 10.
Using SD tools on the phone it says 11.3MB writing speed and 20.8 read speed on average!
When tranferring contents of my previous SD card from PC to the new Lexar using the USB adapter included the transfer speed never got above 10MB/s.
No problems yet. Runs smooth
here is my finding compared to my previous SanDisk 8gb Class 6 card... not sure if im impressed or not..
So does this match other people experience.. im currently on none Rooted Froyo.
lexar 32GB (in USB Adaptor)
Warning: Only 1815 of 28983 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 10.6 MByte/s
Reading speed: 18.2 MByte/s
H2testw v1.4
lexar 32GB (in phone, to PC)
Warning: Only 1815 of 28983 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 10.1 MByte/s
Reading speed: 4.95 MByte/s
H2testw v1.4
SD Tools, write 9.6MB/s : Read 7.6MB/s
========================================================================
My Current card.
SanDisk 8GB (in USB Adapter)
Warning: Only 1815 of 7788 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 10.4 MByte/s
Reading speed: 18.1 MByte/s
H2testw v1.4
SanDisk 8GB (in phone, to PC)
Warning: Only 1814 of 7788 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 4.28 MByte/s
Reading speed: 4.51 MByte/s
SD Tools, write 10.0MB/s : Read 7.8MB/s
I find the files copy quicker to SD cards via a USB adapter. apart from that, I don't like Lexar SD cards very much, I've had better experiences with Sandisk and Kingston, though I've never had a 32GB one, just 16GB and below.
Hi, i bought some days ago an 8GB class 10 micro sd card, hoping it would speed up my phone (i was using app2sd+ with Kyrillo's ROM v7.1).
I didn't notice any diference compared to my old 4GB class 2 card, so i installed SD Tools app to test the speeds, and i realized all the cards i put in my phone get 4MB/s as the maximun write speed, i tried many different sd cards, class 2 and 10 and there's no difference. Then i tried the same cards in my girlfriend's Galaxy Ace and the speeds were much higher, 7~12 MB/s write speed.
I thought it was a rom problem, so i backed up with Titanium Backup and flashed a stock ROM (JPM), but the speeds remain the same (around 4 MB/s for writing), i also tried changing the buffer size from 128kb to 1024, 2048, 4096 with "SD Booster" and "SD Speed Increase" apps, but no good results...
Could my phone be faulty?
Is there any configuration i can try to make my sd card faster? any command line?
What are the speeds you reach with "SD Tools" and classes of your SD card?
Best Regards!
I'm not sure, but I think there's nothing you can do....
Mine is a 16GB class 6 and it's the same, whatever I try. Before had 8GB - was the same.
Whatever I wrote into the 'read ahead buffer'...
But maybe anyone else has an idea?
Try changing the buffer to 0 as sometimes that works.
Sent from my GT-I5800 using XDA App
dilzo said:
Try changing the buffer to 0 as sometimes that works.
Click to expand...
Click to collapse
TNX for the tip, but unfortunately SAME RESULT...
i also get the same speeds..
i think thats a bug with sd tools.
By the way has any one tried data2sd/apps2sd v3? do you face lags?
also do you people have SD or SDHC
I belive that sdtools has a bug. Or is seriously faulty. I have 16GB class 2 sdcard and sdtools claims that my read and write speeds are equivavlent to class 6 card (values range from 6.x/6.x to 8.x/7.x, write/read, respectively (depending on read_ahead_kb values). And I know for a fact that this really cheap sdcard does not have such performance. You can try antutu benchmark, free app on market, which provides a bit more accurate results plus you can select what to benchmark. My card gets 3.0MB/s read and 2.0 MB/s write with default buffer values. Which is more accurate than sdtools. Especially because disks (any kind) usually have higher read rate than write rate (because it is easier to read data than to write it and 'cause we usually perform much more reading than writing, so it is optimized for read operations).
mrvek said:
I belive that sdtools has a bug. Or is seriously faulty. I have 16GB class 2 sdcard and sdtools claims that my read and write speeds are equivavlent to class 6 card (values range from 6.x/6.x to 8.x/7.x, write/read, respectively (depending on read_ahead_kb values). And I know for a fact that this really cheap sdcard does not have such performance. You can try antutu benchmark, free app on market, which provides a bit more accurate results plus you can select what to benchmark. My card gets 3.0MB/s read and 2.0 MB/s write with default buffer values. Which is more accurate than sdtools. Especially because disks (any kind) usually have higher read rate than write rate (because it is easier to read data than to write it and 'cause we usually perform much more reading than writing, so it is optimized for read operations).
Click to expand...
Click to collapse
antutu give me 3.x and 4.x for write and read speed respectively!!
8gb class 10
That is odd. Do you have a card reader? Maybe you can bench from pc and see the results. I have only 2 sdcards, both class 2 and the results I get are to be expected from class 2 cards. There is also possibility that it is a low quality component. If you feel like it try to investigate, get cards info like serial, model and manufacturer and see what you'll discover. Nowadays people are selling everything claiming it to be a better than actually is. I remember reading tests regarding SD 's where they said that same card type from same manufacturer performed about 10 times worse just because one was.made in China and the other in taiwan, or something like that. I personally would do some research but it's up to you.
mrvek said:
That is odd. Do you have a card reader? Maybe you can bench from pc and see the results. I have only 2 sdcards, both class 2 and the results I get are to be expected from class 2 cards. There is also possibility that it is a low quality component. If you feel like it try to investigate, get cards info like serial, model and manufacturer and see what you'll discover. Nowadays people are selling everything claiming it to be a better than actually is. I remember reading tests regarding SD 's where they said that same card type from same manufacturer performed about 10 times worse just because one was.made in China and the other in taiwan, or something like that. I personally would do some research but it's up to you.
Click to expand...
Click to collapse
well i did a bench mark from laptop's card reader.. it was way over 18 mbps.. cancelled the benchmark in the process as it was taking too long.. but half way read speed was definitely above 18mbps.. Also my sdhc's manufacturer is transcend. I hope this company wont betray us!!
well, in that case it might have to do with phone configuration/programming. Maybe devs could figure out why the phone does not utilize full potential of the sdcard. Perhaps low ram, (relatively) "slow" cpu, something...
mrvek said:
well, in that case it might have to do with phone configuration/programming. Maybe devs could figure out why the phone does not utilize full potential of the sdcard. Perhaps low ram, (relatively) "slow" cpu, something...
Click to expand...
Click to collapse
Good point. Hope some dev is listening!!
I have the same problem.
Samsung Galaxy 3 GT-i5800, Android Froyo firmware v2.2 build XWJPL.
I tested with two class 10 microSD cards, quality ones, but got poor transfer rates.
card1: Transcend 8GB MicroSDHC Class10 (TS8GUSDHC10) - up to 20 Mb/s
card2: Samsung 8GB SDHC Plus Class10 (MB-MP8GA/EU) - Read max. 24 Mb/s, Write max 21 Mb/s
Samsung 8GB cl10 test result (SD Tools app): Write: 4.4 Mb/s; Read 5.1 Mb/s
The card write speed should be higher than 10 Mb/s
Hi folks!
Today I reveived my Shield Tablet K1 as well as an SanDisk Extreme Pro 64 GB SD card. Since I wanted to use the SD for storing games I inserted the SD into the Shield and formatted it as internal storage so that I could easily use the SD as storage extension to the existing meager 16 GB normal internal storage without having to root the device.
Then I did a benchmark test with A1 SD Bench and it just showed a read rate of appr. 56 MB/sec but a faster write rate of 61 MB/sec.
Honestly, I'm a bit dissapointed because this card is advertised with a read rate of up to 95 MB/sec. I was also surprised to see that the write rate was higher than the read rate and even almost three times as much as the write rate of the normal internal storage which was 23 MB/sec (read rate was almost 140 MB/sec).
So I would like to know if the Shield gets such miserable read rates with all SDs formatted as internal storage or do you think my card is somehow flawed?
And if this result is normal, do you think I can run games such as Trine 2, Doom 3, HL2, P2 and the like smoothly without experiencing lags or is the read rate too low?
Many thanks in advance for helping me out on this issue
Kind regards,
Maki