yashsingh1/xdaforums huggingface dataset:
[HD7 General] dorianmuthig:
Well, SD cards are allocated in 64KB blocks, and the sequential read and write speed should be the same as the speed of randomly reading the 64KB (or larger multiples of it) blocks. If it isn't, something isn't working properly, this can very well be your card reader device. Try another card reader first.

As I've also previously told you, the card will work fine.
[HD7 General] zeka1974:
Response Via Email (Valentin Albu) 05/11/2011 03:39 AM

Dear José,

If you notice your card might not be performing at optimum speeds please run a test and provide us with test results in the form of Screen Shots. For running speed tests with your product you can find open source applications such as HD Benchmark 3.0 which you can download from the following link: http://www.techarp.com/showarticle.aspx?artno=520

Best regards,

Valentin Albu

SanDisk Technical Support

This are the results:

x264 HD BENCHMARK 4.0 RESULTS

Please do NOT compare it with older versions of the benchmark!

Please copy/paste everything below the line to to report your data

to http://forums.techarp.com/reviews-articles/26363-x264-hd-benchmark-4-0-a.html

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Results for x264.exe r1913

==========================

Pass 1

------

encoded 1442 frames, 41.81 fps, 3909.88 kb/s

encoded 1442 frames, 42.20 fps, 3909.86 kb/s

encoded 1442 frames, 42.87 fps, 3909.89 kb/s

encoded 1442 frames, 40.73 fps, 3909.84 kb/s

Pass 2

------

encoded 1442 frames, 9.12 fps, 3962.60 kb/s

encoded 1442 frames, 9.10 fps, 3962.56 kb/s

encoded 1442 frames, 9.10 fps, 3962.56 kb/s

encoded 1442 frames, 9.17 fps, 3962.59 kb/s

System Details

--------------

Just tried this card on HD7 and notice some lags installing applications and entering some of them.

Again something went wrong with this card.

I will try to find CLASS 2 instead

Thanks,

Santos
[HD7 General] ccsway1:
I was checking the SDSDQM-032G-B35 part number and I found it with an "A" at the end (SDSDQM-032G-B35A). Would that be ok.?? .tks.
[HD7 General] dorianmuthig:
The A just means a TransFlash adapter is included. It enables you to use the microSD card in a normal SD card device.
[HD7 General] jutley:
I was looking at the back cover you need to screw off to get to the micro sd slot I am sure we have some smart moders here who can mod the back cover so we can slide the card in and out more easily. It is possible with bait of thought it can be done let's see what we can come up with hey without destroying our phone completly.
[HD7 General] dorianmuthig:
You would only swap the card once anyway, since there is no benefit apart from capacity changing and repair in being able to replace the card, enabling easy memory swapping makes no sense and only poses a data risk, because your card can be easily removed without your knowledge and without the need to steal your entire phone, giving attackers a wider window to analyse the storage card before you notice it's missing.
[HD7 General] cmiuc:
Thanks Wolflman! Even to this day, this works perfectly...

My 32 gig model is: Sandisk; SDSDQ-327678-P36M... it works great... and fast too! I do feel that phone as certain times is a little more hotter than i ever had before...
[HD7 General] dorianmuthig:
This card working in your phone does not make it a well performant one. Please test the SD card's performance with CrystalDiskMark and post the results before recommending it to others.
[HD7 General] PoisonOmnia:
Ive been looking at various cards, and found this:

http://www.amazon.co.uk/Sandisk-mic...1_2?s=computers&ie=UTF8&qid=1305638186&sr=1-2

Is this the correct card to give me the best chance of a successful and high performance install?

Also is it a reputable seller?

Im quite tempted, as the other cards listed on Amazon seem to be less expensive and finish with the N variation, that I believe are slow and not a good idea to purchase?

Thanks guys. :)
[HD7 General] elyl:
The one I got from Amazon was from the seller KOMPBAY and was not suitable. I don't know if that one would work or not, I'm afraid - just avoid KOMPBAY.
[HD7 General] dorianmuthig:
Now, I didn't know SanDisk themselves sold those at Amazon, but yes, you should get the right card, if not you can return it free of charge to Amazon, as far as I'm aware.
[HD7 General] quezacotl:
Damn, great post!!! Thank you so much Wolfman017!
[HD7 General] epidemic215:
SD Card Question

SDSDQ-032G-A11M

Is this a good card. This is the only one i see around my area.
[HD7 General] dorianmuthig:
No, it isn't. Try ordering a working microSD card online.
[HD7 General] 47chuckit:
Worked like a charm

Saw this post and had to try took all of 15min and I had myself 32gb.Thanks for the great info and pic's
[HD7 General] roadrunner_ak_uk:
anyone know where to get these in the UK?

•Sandisk Class 2 32GB microSD - SDSDQM-032G-B35

?

amazon seem to be out of stock...
[HD7 General] dorianmuthig:
Try searching on http://www.idealo.co.uk/
[HD7 General] GR_mahdi:
hello every one

what kind of memory htc hd7 supported?

are that support sdhc memory's?
[HD7 General] dorianmuthig:
The embedded card reader device and it's memory space virtualization driver in the phone (before OS exposure) supports any SDA standard SD and SDHC memory card operating on the normal bus I/F. SDXC cards, high speed bus I/F and UHS-I Bus I/F are currently not supported. This could change in the future, if HTC decides to implement their support. As the SD card is not meant to be user serviceable, other phones don't need it and there are no microSDXC cards available as of yet, this is however doubtful.

Windows Phone also requires a certain storage memory I/O performance, there are only very few microSD cards that meet them, and the only known manufacturers for working cards are SanDisk/Toshiba and Samsung. Since you cannot buy Samsung memory cards in the retail channel, only SanDisk cards are mentioned here.
[HD7 General] GR_mahdi:
thank you for complete answer

please tell me are this memory suitable for my phone?

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 12.218 MB/s

Sequential Write : 4.479 MB/s

Random Read 512KB : 11.673 MB/s

Random Write 512KB : 0.667 MB/s

Random Read 4KB (QD=1) : 0.926 MB/s [ 226.2 IOPS]

Random Write 4KB (QD=1) : 0.006 MB/s [ 1.4 IOPS]

Random Read 4KB (QD=32) : 2.297 MB/s [ 560.8 IOPS]

Random Write 4KB (QD=32) : 0.005 MB/s [ 1.3 IOPS]

Test : 50 MB [H: 0.0% (0.0/14.9 GB)] (x1)

Date : 2011/05/24 22:06:04

OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)

my memory is toshiba
[HD7 General] dorianmuthig:
No, 4K random write is too slow. Also, please test with 4000MB test size and not 50MB, for more accurate results.
[HD7 General] datagrid.xda:
:(((

My Sandisk SDSDQM-016G-B35 is not working in my HD7 :(

How is it possible?

It is class 4 card...

Results of a test:

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo

Crystal Dew World : -----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 8.315 MB/s

Sequential Write : 4.691 MB/s

Random Read 512KB : 8.664 MB/s

Random Write 512KB : 0.548 MB/s

Random Read 4KB (QD=1) : 3.150 MB/s [ 769.0 IOPS]

Random Write 4KB (QD=1) : 1.299 MB/s [ 317.1 IOPS]

Random Read 4KB (QD=32) : 2.795 MB/s [ 682.4 IOPS]

Random Write 4KB (QD=32) : 0.330 MB/s [ 80.5 IOPS]

Test : 500 MB [E: 0.0% (0.0/14.8 GB)] (x1)

Date : 2011/05/25 13:47:32

OS : Windows 7 [6.1 Build 7600] (x86)
[HD7 General] dorianmuthig:
Well, it should at least be recognized. Make sure you inserted it correctly. Push it into the slot until you hear a clicking sound.

Even though, your benchmark results are fine, please test using the 4000MB block size as this will provide much more accurate results.
[HD7 General] datagrid.xda:
Thank you for your quick reply

Here is 4000MB test.

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 11.800 MB/s

Sequential Write : 5.336 MB/s

Random Read 512KB : 11.585 MB/s

Random Write 512KB : 0.480 MB/s

Random Read 4KB (QD=1) : 3.014 MB/s [ 735.8 IOPS]

Random Write 4KB (QD=1) : 1.227 MB/s [ 299.6 IOPS]

Random Read 4KB (QD=32) : 2.724 MB/s [ 665.0 IOPS]

Random Write 4KB (QD=32) : 1.127 MB/s [ 275.1 IOPS]

Test : 4000 MB [E: 0.0% (0.0/14.8 GB)] (x1)

Date : 2011/05/25 15:16:49

OS : Windows 7 [6.1 Build 7600] (x86)
[HD7 General] dorianmuthig:
This card should work fine, but the 512K random write should be the same as the sequential write for optimum performance (SD cards use 64K allocations of 4KB blocks for sequential access, there's no seek time). This may however be formatting or OS related.
[HD7 General] datagrid.xda:
So what can I do with it?

Card is inserted correctly, i have tried another 2GB card, and It has worked.
[HD7 General] dorianmuthig:
Return it and have it replaced with one that works.
[HD7 General] epidemic215:
Getting Mine Today!!

SDSDQM-032G Will be coming in today. Ordered from Amazon. Will Post if it works.
[HD7 General] RockNLol:
hi guys,

i did this mod with an Sandisk SDSDQM-016G-B35 16GB-microSD-Card. At the first startup it freezed while "installing some features", so after 15minutes i had to take out the accu and start it again. Then i could set it up, but the (sorry i don't know the english word) "Aktien"-App from HTC wasn't installed correctly. It's not availiable in the App-list and when i try to update it it crashes with the erro a0000ffff. Thats not really a problem as long as I have more than the original 8GBs (no 16GB available in Austria :/), it simply shows permanently that I have to update an App in the marketplace tile.

Much worse thing is, that my HD7 is laggy sometimes. When I enter the code to unlock the phone from the screensaver, it sometimes take 2 or 3s to unlock it; really annoying if i entered the wrong code...

But the really bad thing is, that my phone sometimes crashes :( it's simply off then, and when i start it up, it says "Storage card not working. Your storage has changed, is damaged or is non-compilant" :(

what went wrong here?
[HD7 General] zeka1974:
Hi,

For now I'm using Sandisk SDSDQM-032G-B35 16GB Class 4 and he works fine, without problems here. Notice some lags opening some games and applications but this is a momentary situation, I'm waiting a really CLASS 2 32GB card that should work just fine :)

Thanks

Santos
[HD7 General] RockNLol:
mine is just class 2, but class 2 16GB cards are in the compatibility list too. Is it because of this anyway?
[HD7 General] zeka1974:
I have a friend here in Portugal with that card Class 2 and he has no problems like you mentioned...maybe a bad card?

Try to take off the card again, format it with Nokia E71 and next format it with SDFormatter; then try again on HD7...if the problems continues you have a bad card just return it

Thanks

Santos
[HD7 General] RockNLol:
i neither own a Nokia N71 nor know andybody who has one. Can I do something else?

*I'm about to reset the OS, at the moment I'm hangin' again at "INstalling some Applications. It just takes a moment." (roughly translated from german...). Since 4 minutes now.

Hey, wow it didn't freeze, it just takes f***'in long ^.^ hopefully it works this time, I'll give feedback after testing it tomorrow ;)
[HD7 General] Kwincy:
Just did this mod with the Sandisk 32GB SDSDQM-032G and so far so good. 28GB of awesomeness.

Thanks OP!
[HD7 General] epidemic215:
Get Mine Today

OK Just installed it today. 32gb class 4. got it of amazon for 60usd. not in orignal packing but it works in my phone it read 29GB so Im happy going to start putting stuff back on my card. Didnt run any test sorry.

Well Well Well It seems it a fake. I DL only 10GB of items and it stopped on Zune when i had 12GB to go. Ill just pay full price from scandisks site.
[HD7 General] Hamsn:
I think I am going to get this, the Mango is tempting me.

Thanks for the tutorial.
[HD7 General] roadrunner_ak_uk:
SDSDQM-032G-B35 not working.

recieved my SDSDQM-032G-B35 yesterday, (its a class 4 is that right?) & my HD7 doesnt recognise it at all :( definatley a Genuine card, clicked into place 3 or 4 times,

had to put my 8GB back in... :(

will try & find a transflash adaptor to test....
[HD7 General] jutley:
I thought they only do a class 2 class 4 is from asin mark and rare to get so I say it's a copy
[HD7 General] jutley:
Do you think HTC hd7 can eat this card

http://www.kingmax.com/news_info.asp?fid=145&id=2030
[HD7 General] dorianmuthig:
This is no longer true, fabrication has now switched to the new manufacturing process completely and there's plenty of the new cards to go around.

Eat it? Probably. It just won't work, because it's an SDXC card. The HTC driver only accepts SDA standard SD and SDHC cards. You may want to contact HTC to update their pre-boot ROM with the next update to support SDXC cards on their phones (all phones) as apparently there's some microSDXC cards available now.
[HD7 General] dapupster:
Even though most of our mobile devices are now capped to support microSD cards of only up to 32GB, that doesn’t stop manufacturers from bringing on the next generation of microSD cards. KINGMAX has just announced the launch of the world’s first-ever 64GB microSD card. Like its name says, it will store up to 64GB of data which translates into roughly 30,000 digital photos, more than 2m000 albums, or 24+ hours of 720p HD video. It has a Class 6 rating which means read/write speeds of up to 48Mbps, and it will feature error correction control, low energy consumption and to top it all off – a lifetime guarantee
[HD7 General] dorianmuthig:
Oh, wow, that sounds like you're from KINGMAX marketing dept.

If you are, please test the card in an SDA compliant SDXC card reader using CrystalDiskMark with the settings Random Data (File -> Test Data -> Random (Default)), 9 passes, 4000MB. Make a screenshot (of the entire screen), save it and upload it somewhere, select Edit -> Copy and paste the text from the clipboard here along with a link to the screenshot file.

Also test the card with ATTO Disk Benchmark v2.46 or newer using transfer sizes from 0.5 to 8192.0 KB, Direct I/O (Overlapped I/O), Queue depth of 4 and Total Length of 2 GB. When the benchmark test finished, click File -> Save, save the benchmark as a file, upload it as well and provide a link to it. Then make another screenshot, save it and also provide a link to it.

When you're done with that, put the microSDXC card in a modern HTC mobile phone (released to the open market in the last 6 months) based on the Android operating system (Windows Phone 7 Series devices aren't user servicable without voiding the warranty or cosmetically damaging the device) to see if you can use the memory card in the device. If you can't, please contact HTC via the methods of contact listed at http://www.htc.com/tw/about-htc/phone-contact.html
[HD7 General] Dr.8820:
this card works flawlessly :).
[HD7 General] dorianmuthig:
Please provide a performance test result of the card, before you claim it's working properly. What you see working fine for you, may not be the performance needed and may degrade over time or cause other problems you may not be aware of, because of the nature of how you use your phone.

The card model number you mention is also not on the list of SanDisk made cards and even though it may say SanDisk printed on it, may therefore not have been made by them and there's no way to tell if you actually get what you bought.
[HD7 General] sandrax2020:
If i was you kiddo, i would never but never install a higher GB ram into this phone. Because you could end up 100% break the warranty and second your going to more then likley ruine your phone.

If you like a big GB ram. its best to buy a tablet because a small phone like that would just be silly to think you are there using it day and night on a tiny small 4.3 screen

Its dangerious to open it up and isntall something. Because you can easily break the phone. My phone allready came with 32of ram so im not complaning what so ever.

goodluck who tries to install more space of ram.
[HD7 General] dorianmuthig:
It's not RAM, the RAM (and also the ROM) is a tiny chip soldered onto the primary PCB, you need a heat gun to remove it and precision soldering equipment (factory grade) to add a new one, and then you wouldn't even know if that works, because the RAM size is usually hard coded into the boot ROM.

What you are swapping out here is the memory card used for storage, which is in a hidden ejectable slot inside the phone. If you have a lot of music you want to listen to on the go more storage is always a good thing, even more so, if you want to bring your own movies to watch on a flight.

And the all HTC Windows phones are only sold with either 8GB or 16GB of storage unless serviced by a third party.
[HD7 General] elyl:
I have no idea what you're talking about regarding tablets. Do you think the storage size of a device has to be directly proportional to the screen size or something?!

Anyway, I'm currently using about 24Gb or my upgraded 32Gb HD7 for my music collection. I expect another gig or two will be used whenever a decent offline GPS app becomes available. I've not even begun installing all the apps I want yet. I foresee I might have a few movies I might carry around with me... perhaps even 32Gb might not be enough for my 4.3" screen device soon!
[HD7 General] Mr4eyes86:
http://www.amazon.com/SanDisk-Flash...WHN0/ref=sr_1_1?ie=UTF8&qid=1306706921&sr=8-1

Is this one compatible guys?
[HD7 General] dorianmuthig:
I couldn't tell you. The last part of the model number isn't listed. However if you get a class 4 card that's been manufactured within the last month, chances are it'll work fine. Just to be sure, run a benchmark like described in a few posts earlier and post the results.
[HD7 General] roadrunner_ak_uk:
from my 32gb card, (not even recognised! phone diddnt format it either) its a class4 Sandisk SDSDQM-032G-B35

from the tests it looks like the write speed is too slow, am i correct? & is this below class 4 spec?

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo

Crystal Dew World :

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 7.049 MB/s

Sequential Write : 3.178 MB/s

Random Read 512KB : 6.919 MB/s

Random Write 512KB : 3.161 MB/s

Random Read 4KB (QD=1) : 1.272 MB/s [ 310.4 IOPS]

Random Write 4KB (QD=1) : 0.037 MB/s [ 9.0 IOPS]

Random Read 4KB (QD=32) : 1.220 MB/s [ 297.8 IOPS]

Random Write 4KB (QD=32) : 0.027 MB/s [ 6.5 IOPS]

Test : 4000 MB [D: 0.0% (0.0/29.7 GB)] (x5)

Date : 2011/05/28 4:02:02

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo

Crystal Dew World :

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 6.984 MB/s

Sequential Write : 3.179 MB/s

Random Read 512KB : 6.828 MB/s

Random Write 512KB : 3.236 MB/s

Random Read 4KB (QD=1) : 0.992 MB/s [ 242.1 IOPS]

Random Write 4KB (QD=1) : 0.058 MB/s [ 14.3 IOPS]

Random Read 4KB (QD=32) : 0.955 MB/s [ 233.0 IOPS]

Random Write 4KB (QD=32) : 0.026 MB/s [ 6.3 IOPS]

Test : 4000 MB [D: 0.0% (0.0/29.7 GB)] (x5)

Date : 2011/05/28 10:48:32

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x86)
[HD7 General] dorianmuthig:
This is a bad card, or you got a fake card. Return it and have it replaced. And yes, 4K operations are too slow.
[HD7 General] Mr4eyes86:
http://www.amazon.com/Sandisk-Sdsdq...7H7G/ref=sr_1_6?ie=UTF8&qid=1306775402&sr=8-6

How about this one? It has an "N" at the end of the part number? Will this suffice???

Thanks for your help :)
[HD7 General] dorianmuthig:
No, some people reported problems with that one. Get this one: http://www.amazon.com/dp/B004MVMCTU/ It costs less, too.
[HD7 General] Mr4eyes86:
Hey everyone, I'm curious why it has to be scandisk microsd? I have a kingston official 32gb class 4 that I used in my nand hd2 before I switched to my HD7. I'm currently running the benchmark you suggested....it's taking freaking FOREVER!!!

So far my sequential read speeds is 19.75 mb/s, it's currently doing the sequential write speeds.
[HD7 General] elyl:
As I understand it, Kingston don't manufacture their own cards, they buy batches of other people's cards and label them Kingston. This means there is no consistent quality or specs between the cards.

Your Kingston card may work perfectly well, and the stats may all pass the test, but it doesn't then mean anyone who buys that model of Kingston card will get the same results, as it may be a completely different spec of card they get.
[HD7 General] Mr4eyes86:
-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World : http://crystalmark.info/

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.768 MB/s

Sequential Write : 4.953 MB/s

Random Read 512KB : 17.927 MB/s

Random Write 512KB : 0.692 MB/s

Random Read 4KB (QD=1) : 1.762 MB/s [ 430.2 IOPS]

Random Write 4KB (QD=1) : 0.006 MB/s [ 1.5 IOPS]

Random Read 4KB (QD=32) : 1.992 MB/s [ 486.2 IOPS]

Random Write 4KB (QD=32) : 0.006 MB/s [ 1.5 IOPS]

Test : 4000 MB [F: 0.0% (0.0/28.9 GB)] (x1)

Date : 2011/05/30 17:03:06

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64)

Results from my Kingston sd card I was using in my hd2 nand android....here's the link

http://www.newegg.com/Product/Product.aspx?Item=N82E16820139394
[HD7 General] dorianmuthig:
That card is too slow for Windows Phone (4KB random operations) and class 4 performance is questionable (Kingston only warrants sequential speeds) and the card may also not be suitable for HD video recording.
[HD7 General] Mr4eyes86:
Thank you for all your help so far. I'm running the test again. originally when I ran the test I had formatted the card, but the allocation unit size was set at 16kb when I formatted it. So I read in an earlier post to use 64kb allocation....

I'll post back the results when this benchmark is done.

P.S. How long does this benchmark usually take for you guys? It seems to take forever for me. about an hour or so. I'm using the sd card reader adapter it came with.
[HD7 General] dorianmuthig:
Don't use larger allocation units, it won't make a difference anyway since the test is file based (blocks in files can be allocated as desired) and Windows Phone doesn't create an actual file system on the card, it creates a JBOD like combined storage space.

Use the formatter from http://www.sdcard.org/ to format your SD card. This will properly align the file system according to SDA specification. Then run the test.

The test should take ~17 minutes per test, per pass in addition to ~30 minutes for storage space preparation on a class 4 card. If your card is slower than specified, it may take longer.
[HD7 General] quezacotl:
wow... impressive. Great post!
[HD7 General] Mr4eyes86:
Formatted the card as suggested and basically same results. I'll pick up that sd card you posted and reply back here with the results once i get it in the mail.