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Could anybody tell me, why my new SD Card (Panasonic 2 GB Class 6) is much slower on my Alpine than my old SD Card (Panasonic 2 GB Class 2)? Here are the results from the SK Tools benchmark :
Class 2 Card: Read 6187 kb. Write 636 kb.
Class 6 Card: Read 729 kb. Write 481 kb.
Isn't it funny?
Perhaps I should format the SD Card properly?
Any ideas?
Thank you.
are cards empty when you check write speed?
class tells about writing speed on complitely empty cards
I tried both benchmarks, with the empty and the full card. The class 2 is much faster, especially in the write result. Unfortunally I formatted the new card on my device, with the effect that the card was become more slower. After that I formatted the card on my computer, now it's better, but nevertheless slower than the old one.
maybe it's something wrong with the card
the 2nd one is almost 10 times slower readed :/
did you check speeds on PC?
maybe PPC just can't handle with faster card
deezer said:
maybe it's something wrong with the card
the 2nd one is almost 10 times slower readed :/
did you check speeds on PC?
maybe PPC just can't handle with faster card
Click to expand...
Click to collapse
Well, that's my question. Where can I get the adequate information? How can I check the speeds?
use this
http://www.simplisoftware.com/Public/index.php?request=HdTach
Now I've found out that SD/SDHC Memory Card file systems formatted with generic operating system formatting software do not comply with the SD Memory Card specification. You need a special formatting program that complies with the SD Memory Card specification.
Because I have a Panasonic card, I took the Panasonic free SW (
link: http://panasonic.jp/support/global/cs/sd/download/sd_formatter.html).
The benchmark results are: Nearly 14000 KB/s (read), but still 470 KB/s (write) only.
No idea, how to increase the write performance.
Guys,
Got a pretty important question; Yes, I've searched. Don't flame the n00b
Using the N1 as a mass storage device, how fast is the transfer speed?
and
Does the speed/class of the SD card make a difference?
Cheers,
It is ass fast as memory stick. Yes, class of sd card makes all the difference.
I was kind of looking for speed in MB/sec
We all know memory can sticks vary from 1MB/sec to 20MB/sec
Fastest I've seen my transfer speeds are 5 MB/s
This very thing is a problem i am having with my N1. i have a 4gb class 6 card in it and when i mount the N1 to my PC i get transfer speeds of 500k to 1mb asec, but then when i plug the SD card into a USB reader i will get speeds up around 8mb asec. I have USB debugging enabled and it doesn't help. So right now transfer speeds to be blow big time. Not sure why it is doing this or whats wrong.
Any info on this? My phone tops out at around 3 megs. I hooked up a Moto Droid and it was moving stuff at 12 Megs a sec.
Experiencing same sluggishness w/ class 6 card.
I think transfer speeds from N1 to PC are independent of the SDcard when plugged in through the USB cable (unless it's like a class 2).
The actual cable and the N1 restrict speeds as long as you're acessing the SD via USB. You're getting differing speeds when putting it in an adapter because the adapter has different transfer speeds and doesn't need to go through the N1 to transfer.
You're going to be capped when transferring from N1 to pc via USB.
on average with the stock 4GB card when in the N1 I see around 1.5-3mb a sec... When I plug the card directly in a card reader I get 5-8mb a sec. It's much faster for me to turn the phone off, take out the card and stick it in a card reader if I'm transferring any more than a few hundred MB.
Just wanted to bump this, as I'm using an 8 gig card, and froyo 2.2 now. I'm getting consisten 3.5 MB - 4 MB, where as before I couldn't break 2 megs. Not sure what class the card is.
Thread update: I now have a Desire with 16gb Class2
7-8MB/sec Writing.
Reading is even quicker.
Transferring a 800mb file to N1 in mass storage (sandisk class 6 8gb) I got about 2.5mb/s using original htc data cable
Using a card reader i got 11mb/s
hellbringer626 said:
Transferring a 800mb file to N1 in mass storage (sandisk class 6 8gb) I got about 2.5mb/s using original htc data cable
Using a card reader i got 11mb/s
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How is the card reader connected to the computer? Does it go into a USB port or is it a flash card reader built into a laptop?
Wow. 11MB/s is really fast - are you sure of that number? Sandisks are known generally overachievers, but Class 6 is only rated at 6MB/s write so if that number is right then - wow.
JCopernicus said:
Just wanted to bump this, as I'm using an 8 gig card, and froyo 2.2 now. I'm getting consisten 3.5 MB - 4 MB, where as before I couldn't break 2 megs. Not sure what class the card is.
Click to expand...
Click to collapse
Those sound like the theoretical class 4 speeds.
I have a class 6 16GB card and even with froyo, I can't break the 2MBps rate (Running win7 x64).
Stock froyo/FRF50 or a custom rom based on it?
I just recently got my first Class 6 SDHC 8GB card expecting it to be a lot faster transferring than my stock Class 2 4GB. It's the same. But, when I put my class 6 into a card reader, it writes at 15mbps or higher. Sucks that we have to turn the phone off to remove the SD card.
Here are my test results (on the phone, not mass storage), hope this helps.
SD Card: 16GB RiData Class 6, from newegg.com
Application: J BenchMark 1.0 (market)
Test media: SD Card
Data Size: 10.0 MB
Buffer size: 8KB
Performance over 3 Runs.
Write performance (MB/s): 7.78, 9.29, 11.92
Read performance (MB/s): 12.33, 16.61, 17.39
britoso said:
Here are my test results (on the phone, not mass storage), hope this helps.
SD Card: 16GB RiData Class 6, from newegg.com
Application: J BenchMark 1.0 (market)
Test media: SD Card
Data Size: 10.0 MB
Buffer size: 8KB
Performance over 3 Runs.
Write performance (MB/s): 7.78, 9.29, 11.92
Read performance (MB/s): 12.33, 16.61, 17.39
Click to expand...
Click to collapse
SD Card: 8GB Transcend Class 6, from amazon.com
Same App/Settings
Performance over 3 Runs.
Write performance (MB/s): 4.57, 4.7, 5.81
Read performance (MB/s): 6.37, 6.73, 7.23
Much slower.
Does the speed of the card determine the transfer speed between the Phone and PC or within the Phone itself?
I'm wondering if it's worth the extra 20 to get a class 6 over a class 4.
This has been discussed before. The phone dictates the data transfer speed between the PC and SD card.
So what transfer speed does the Nexus One dictate?
Well..when tommyarmour and I were discussing this in his thread a month ago..neither of us got more than 2mb/s or so using class 4 and 6 cards. Plugging my class 6 directly into my computer's card reader got me over 6.5mb/s.
There are 2 distinct things about SD card performance:
1) If one roots and uses APP2SD method, where N1 stores apps on an EXT* partition on on the _card_ , instead of its own, built-in and very limited flash storage, then one would probably want faster performing card so that apps load faster. Especially if you have a game with tons of textures/scenery
2) Unrelated to #1, faster cards should allow faster transfer rates from one's computer to the N1's SD card - so when you have large music/image libs, those
could be moved on/off device quicker. But it appears that N1 limits such external transfer rates, making it moot to go for faster cards (unless you use APP2SD) . One can get faster rates by yanking the card out and using an external, proper, reader - so that might help if one needs to move say 10GB of music onto the card.
Bottom line: you can spring for 16GB Class 6 Card (Adata's are good, about U$60 on Amazon), save few bux and get slower card or wait another month for 32GB cards to appear in stores and make your decision _then_
rashid11 said:
There are 2 distinct things about SD card performance:
1) If one roots and uses APP2SD method, where N1 stores apps on an EXT* partition on on the _card_ , instead of its own, built-in and very limited flash storage, then one would probably want faster performing card so that apps load faster. Especially if you have a game with tons of textures/scenery
2) Unrelated to #1, faster cards should allow faster transfer rates from one's computer to the N1's SD card - so when you have large music/image libs, those
could be moved on/off device quicker. But it appears that N1 limits such external transfer rates, making it moot to go for faster cards (unless you use APP2SD) . One can get faster rates by yanking the card out and using an external, proper, reader - so that might help if one needs to move say 10GB of music onto the card.
Bottom line: you can spring for 16GB Class 6 Card (Adata's are good, about U$60 on Amazon), save few bux and get slower card or wait another month for 32GB cards to appear in stores and make your decision _then_
Click to expand...
Click to collapse
I got lucky. I won my 16GB class 6 micro SD card. I do, however, wish to get another 16GB card but don't want to spend the money so I'm waiting for the 32GB to come out and the 16GB to drop in price. 8GB is just not enough for music, apps2sd and nadroid/ext backups. I've been having to compromise and either keep only one nandroid on my SD card or cut down on my music (which I hate doing). A 32GB card would be GOLDEN but I don't even want to think about what that's going to cost.
rashid11 said:
There are 2 distinct things about SD card performance:
1) If one roots and uses APP2SD method, where N1 stores apps on an EXT* partition on on the _card_ , instead of its own, built-in and very limited flash storage, then one would probably want faster performing card so that apps load faster. Especially if you have a game with tons of textures/scenery
2) Unrelated to #1, faster cards should allow faster transfer rates from one's computer to the N1's SD card - so when you have large music/image libs, those
could be moved on/off device quicker. But it appears that N1 limits such external transfer rates, making it moot to go for faster cards (unless you use APP2SD) . One can get faster rates by yanking the card out and using an external, proper, reader - so that might help if one needs to move say 10GB of music onto the card.
Bottom line: you can spring for 16GB Class 6 Card (Adata's are good, about U$60 on Amazon), save few bux and get slower card or wait another month for 32GB cards to appear in stores and make your decision _then_
Click to expand...
Click to collapse
Thanks for the explaination. Now do you think anybody out there is trying to 'open' up this limitation of the N1's transfer speed? Hope so...I thought I had an adapter...so I ordered a card without an adapter...but, now I can't find it!
BTW...I sprung for a 16GB class 6. Was a present...so why not.
I know it has been asked a lot in the past, but searching didn't provide Milestone specific answer.
So If I buy Class 6 or Class 10, will the milestone be able to utilize the full write speed? I am running Cyanogenmod 7 RC0 (latest). At the moment I have 8GB class 4 Apacer microSD and tbh its a terrible card. All I get is 2.5 mb/s write on large files, but I am getting the same speed when the card is in card reader too so its not phone issue.
Thanks.
Maybe I'm wrong, but what I know is that the card class is the limit. It doesn't mean it will read/write at full speed all the time.
How are you testing your speeds?
Maybe SD Speed Increase help you.
https://play.google.com/store/apps/...t=W251bGwsMSwxLDEsImNvbS5zZGluY3JlYXNlLml0Il0.
I don't know how to test my speeds, but were getting 24mb/s read and 8mb/s write speeds in SD Tools ( https://play.google.com/store/apps/...1bGwsMSwxLDEsImFsZXMudmVsdXNjZWsuc2R0b29scyJd ). I'm using a Samsung 16gb Class2. I think the app is not calculating very well. Don't know.
I am using the SD card as USB mass storage instead of carrying separate thumb drive. I transfer a lot of large 1+ GB files.
I tried SD Speed increase last week and it does make a difference on smaller files, but when copying 2GB files it seems to start fast (like a burst mode), but if timed it takes exactly the same time to write something on the card.
I am going to change my 8GB card for 16GB today anyway I just wondered if class 10 is worth getting or should I get class 6 and save some money. Whatever I buy I will report back and test the speed.
I went ahead and bought Patriot LX 16 GB class 10 microSD. Now I get variable speeds from 3.5 mb/s to 8 mb/s depending on the file sizes. As I read somewhere this is due to fact that the phone is using MTP protocol to act as mass storage device.
Anyway with the old card I was topping only 2.5 mb/s no matter the file size, so it's definitely an upgrade and since class 6 was only 5$ cheaper I saw no reason not to buy the faster one, even if the milestone can't utilize its full capability. In the end its an old phone and I believe there weren't any class 10 cards out in 2009 anyway.
And one more thing, the camcorder isnt lagging anymore when recording videos
EDIT: After booting in recovery and clearing dalvik and cache partition I am getting 9.5 + mb/s, but it does start around 4.5 mb/s and then rises to its full speed. Cheers.
Except for the improvements in video recording, is there anything else that runs smoother for you when using the phone?
maango said:
Except for the improvements in video recording, is there anything else that runs smoother for you when using the phone?
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Click to collapse
I think everytime any app need to access your sd, it will be smoother, like gallery, taking photos, loading maps cached in sd, music apps indexing songs, etc. Accessing apps installed on sd card may be loaded faster too.
extrem0 said:
I think everytime any app need to access your sd, it will be smoother, like gallery, taking photos, loading maps cached in sd, music apps indexing songs, etc. Accessing apps installed on sd card may be loaded faster too.
Click to expand...
Click to collapse
Thats right. Gallery loads faster, applications and games moved to SD start up faster etc. Don't know about maps, but I suppose they cache faster too.
However the main difference is when copying stuff to phone in mass storage mode. Thats why I got a higher class card in first place. While all other stuff related to reading from SD do seem snappier, the difference is not all that great since even Class 2 cards can read with high speed, but when it comes to apps that are writing the difference is obvious.
I'm using a Samsung Essentials 32GB Class 10 Card.
Gave me some troubles at first, something with sector sizes seemed wrong - but after formatting it with this tool https://www.sdcard.org/downloads/formatter_3/ it worked.
Someone in these forums suggested the tools - search for the link to find the recommended settings.
Alright, thx for the answer. For someone not using the phone the same way as you, do you think it would be worth the money to get a faster card?
Sent from my Milestone using XDA
The difference between class 6 and class 10 right now is only few bucks. I don't see why not. You never know, may come in handy.
Here check this out, less then 1$ difference in price.
16GB microSDHC CARD Class 6 - Transcend
16GB microSDHC CARD Class 10 - Transcend
I wouldn't go below class 6 since the camera is lagging when recording videos.
Is it true that if a formatted microSD often will make it slow microSD?
It' unlikely, but possible.
My Samsung Essentials 32GB Class 10 card gave my Milestone hiccups at first (rebooted several times when powering on, rebooted every time I left USB mass storage mode) so I re-formatted it using these instructions: http://forum.xda-developers.com/showpost.php?p=23494134&postcount=7417
Now everything works fine and I still get a little more than 10MB/s when copying movies via USB - so no loss here.
To all HD7 users who have installed microSD or microSDXC, with capacities of 32 or 64GB; can you please post some photos or screenshots on WPBench "Storage Test" of your device, that will help people to choose brands and models, also don't forget to include basic info as the ROM being used, type: OEM or Custom and Bootloader version.
Let's do a Database of working Class 10 cards for the HD7.:highfive:
And please don't come with the "only Class 2" myth, because there are several users here using Class 10 cards on the HD7 that haven't got any issues, also don't come with the "Class 2 has better speed" thing... is just another MYTH!
I tried a Class 6 once and ran perfectly(even faster), I didn't use it because it was a 4GB microSD... also my HD7 and HD7S have 16GB Class 4 on them(they came with that card) not Class 2.
Important: for better results get the WPBench data with an empty phone(no music, photos or videos on it), I have noticed that a filled(even partially) phone gives lower speeds on the storage benchmark. (yeah, that's very weird!)
Answer ONLY IF you have a Class 10 sd card on your HD7.
Format for the posting
WPBench Screenshot
microSD card brand
microSD card model
ROM Version
Bootloader Version
Thanks for testing your cards. For having the courage to buy and test those cards on this wonderful device.
Forget it!!!
I've been making some bench myself WPBench is unreliable, its test about storage speed is crap...