yashsingh1/xdaforums huggingface dataset:
[HD7 General] cheechm13:
I purchased a 32gb microsd card through Buy.com via a link in this thread. It finally showed up after a week and a half and it wasn't even in a retail packaging. It came in an envelope with only a plastic case. It came with an SD card adapter.

I must be getting too damn old because I can't read the small little yellow/green letters below the "32GB".

Is there another way to determine what microsd card I actually got?

I downloaded CrystalDiskInfo and it is only recognizing my Hitachi laptop drive and nothing plugged into my Kingston 7in1 card reader or my laptop SD card slot (with adapter or regular SD cards).

I am thinking I got a counterfit card and would rather figure that out before I rip into my phone and erase everything!

Thanks for any help. I can take a picture but I doubt you will be able to read the numbers...

edit...I got it to recognize in CrystalDiskMark

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

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World :

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

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

Sequential Read : 23.423 MB/s

Sequential Write : 5.968 MB/s

Random Read 512KB : 22.380 MB/s

Random Write 512KB : 0.511 MB/s

Random Read 4KB (QD=1) : 3.561 MB/s [ 869.3 IOPS]

Random Write 4KB (QD=1) : 1.335 MB/s [ 326.0 IOPS]

Random Read 4KB (QD=32) : 3.467 MB/s [ 846.5 IOPS]

Random Write 4KB (QD=32) : 0.769 MB/s [ 187.8 IOPS]

Test : 1000 MB [J: 0.0% (0.0/29.7 GB)] (x1)

Date : 2011/07/20 20:55:20

OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x64)

And...a picture did work for my tired old eyes!!!

Can anyone tell me what cards these are?? Will either work with my HD7??
[HD7 General] dorianmuthig:
@nicodekker: The 4K writes of your 16GB card are too slow for Windows Phone.

@cheechm13: The model number isn't written on the microSD cards themselves (only the manufacturing serial number which is not to be confused with the internally stored CID and SID), you need to ask your supplier which card you got. Nevertheless, your spee figures look good, you can try to replace the card in your phone. If you run into problems, send it back and have it replaced.
[HD7 General] andmost:
someone can confirm me that if I buy a Sandisk 32gb SDSDQM-032G-B35 class 4 then it works on htc hd7 with the last official firmware ?

thanks for your help
[HD7 General] dorianmuthig:
Well, it should work, but no guarantees. As with everything, you might get the bad one of the bunch. If that's the case, just return it and ask for a replacement.
[HD7 General] Lord AnubiS:
I have found a Transcend 32 Gb class 4 micro SD memory, anyone know if its works with the HD7???
[HD7 General] dorianmuthig:
Probably not, but you can always try it.
[HD7 General] AdamBlue:
Since the HTC update yesterday, I get errors about my card not being supported and my phone constantly reboots. I may do a reset here in a minute, just need to save some stuff.
[HD7 General] dorianmuthig:
This shouldn't happen if you had a compatible card.
[HD7 General] roadrunner_ak_uk:
sandisk sent me an 11m as a replacement! doh!

tested it anyway:

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

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World :

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

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

Sequential Read : 5.883 MB/s

Sequential Write : 3.158 MB/s

Random Read 512KB : 5.874 MB/s

Random Write 512KB : 3.099 MB/s

Random Read 4KB (QD=1) : 0.904 MB/s [ 220.7 IOPS]

Random Write 4KB (QD=1) : 0.079 MB/s [ 19.2 IOPS]

Random Read 4KB (QD=32) : 0.885 MB/s [ 216.1 IOPS]

Random Write 4KB (QD=32) : 0.023 MB/s [ 5.6 IOPS]

Test : 4000 MB [E: 0.0% (0.0/29.7 GB)] (x1)

Date : 2011/07/29 9:23:42

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

too slow?

they have shipped out another card for me so hopefully it will be fast enough
[HD7 General] dorianmuthig:
Yes, too slow.
[HD7 General] roadrunner_ak_uk:
ok, next card that they sent me, class 4 but not in retail packaging...

very strange 512k writes... 4k looks superfast though....

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

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World :

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

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

Sequential Read : 7.490 MB/s

Sequential Write : 5.014 MB/s

Random Read 512KB : 7.425 MB/s

Random Write 512KB : 0.469 MB/s

Random Read 4KB (QD=1) : 2.092 MB/s [ 510.8 IOPS]

Random Write 4KB (QD=1) : 0.854 MB/s [ 208.6 IOPS]

Random Read 4KB (QD=32) : 2.035 MB/s [ 496.9 IOPS]

Random Write 4KB (QD=32) : 0.777 MB/s [ 189.6 IOPS]

Test : 4000 MB [E: 0.0% (0.0/29.7 GB)] (x1)

Date : 2011/08/02 9:14:39

OS : Windows 7 Enterprise Edition [6.1 Build 7600] (x64)
[HD7 General] dorianmuthig:
Superfast? Not really, it's barely enough. I've seen much faster cards (doing 5MB/s and up in 4K read and 16MB or more in sequential). You can try that card, but from what I've seen, many of the cards with the odd 512K performance don't work properly and even get no longer recognized on boot if you reset (settings -> about -> reset your phone) your phone twice.
[HD7 General] roadrunner_ak_uk:
2nd test of same card: still very slow random write 512k

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

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 : 7.477 MB/s

Sequential Write : 4.932 MB/s

Random Read 512KB : 7.438 MB/s

Random Write 512KB : 0.538 MB/s

Random Read 4KB (QD=1) : 2.185 MB/s [ 533.3 IOPS]

Random Write 4KB (QD=1) : 0.798 MB/s [ 194.8 IOPS]

Random Read 4KB (QD=32) : 2.045 MB/s [ 499.3 IOPS]

Random Write 4KB (QD=32) : 0.813 MB/s [ 198.4 IOPS]

Test : 4000 MB [E: 0.0% (0.0/29.7 GB)] (x1)

Date : 2011/08/02 11:21:34

OS : Windows 7 Enterprise Edition [6.1 Build 7600] (x64)
[HD7 General] roadrunner_ak_uk:
yep lagging out & crashing....

i give up....

will sell the card on ebay & try again at a later date when theres more compatable cards :(
[HD7 General] mateenf:
This is indeed a great post!! If this is possible it should be even possible to load an OS on this storage and use HD7 as dual boot....? Developers out there.. any response to this?
[HD7 General] AdamBlue:
It is a 100% compatible card. Worked fine pre-update for about four months.
[HD7 General] dorianmuthig:
This isn't possible yet. There is an RSPL/HSPL out there though, so this may be possible soon.
[HD7 General] Ttblondey:
what happen when use i remove the new 32gb card and slot in back the original card,will everything inside the card be usable again?
[HD7 General] dorianmuthig:
Yes, if you insert it properly it'll be just like it was before.
[HD7 General] Ttblondey:
i believe we will still void the warranty ;)
[HD7 General] dorianmuthig:
Well, yes, obviously. You'll void it by opening or disassembling the device, what you do afterwards doesn't really matter much then...
[HD7 General] enyaj:
Is it possible for the new updates(Mango) to run the cards normally now? Or will it be forever like this?
[HD7 General] dorianmuthig:
There are no changes as to how SD cards or internal memory are used by the operating system. Windows Phone also doesn't properly align the storage space to the internal NAND flash blocks in the card which is why some few cards perform incredibly poorly even though they work just fine in other comparably modern mobile phones.
[HD7 General] StyxJ:
Cool thanks for posting, I'm probably going to do this with my HD7.
[HD7 General] enyaj:
Thanks! Hope there will be at least a 32gb WP7 soon.
[HD7 General] dorianmuthig:
There is. The Dell Venue Pro is available with 32GB of storage.
[HD7 General] sthEn:
Do you think i should try this card? Kingston 16GB Class10.

What the hell is going on with those random writes 4kb?

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

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 : 17.149 MB/s

Sequential Write : 16.520 MB/s

Random Read 512KB : 16.586 MB/s

Random Write 512KB : 1.066 MB/s

Random Read 4KB (QD=1) : 2.245 MB/s [ 548.0 IOPS]

Random Write 4KB (QD=1) : 0.011 MB/s [ 2.7 IOPS]

Random Read 4KB (QD=32) : 2.527 MB/s [ 617.0 IOPS]

Random Write 4KB (QD=32) : 0.012 MB/s [ 2.9 IOPS]

Test : 1000 MB [I: 0.0% (0.0/14.8 GB)] (x2)

Date : 2011/08/10 18:48:43

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64)
[HD7 General] dorianmuthig:
Two things: First, class 10, high-speed UHF and higher cards aren't supported. Second, 4K random writes are too slow. You need at least 10 times that.
[HD7 General] sthEn:
Damn, that's a shame. WP7 on my HTC HD2 was "flying" super fast on that SD Card :/
[HD7 General] dorianmuthig:
That's probably because the HSPL emulation caches some OS parts persistently in memory, which natively aren't cached. That card might be fine for music playback or video recording, but for playing games or using I/O intensive applications it would still exhibit very poor performance.
[HD7 General] sthEn:
Has anyone tried Kingston MicroSDHC 32GB Class 4 (SDC4/32GB)? I can get it really cheap in my workplace, but i'm too scared to take a risk.

And which 16gb would you recommend?
[HD7 General] dorianmuthig:
No, you're gonna have to try it.

Get a SanDisk card that was recently manufactured and hope it works.
[HD7 General] Mr4eyes86:
I tried that Kingston class 4 32gb and it did not work. Don't waste your time.
[HD7 General] AdamBlue:
Using this for those assuming I had an incompatible card:

Sandisk SDSDQM-032G-B35 (Class 4)

When updated to the latest HTC update (even with Mango), the phone randomly restarts, sometimes with the screen telling me the card is incompatible. The phone worked flawlessly before the update.

I'm even using a 3rd phone, and before I updated the latest HTC firmware on that it worked fine...the only other constant is the battery. The update might just be looking at the card though...but I haven't heard of anyone else having a problem.
[HD7 General] dorianmuthig:
Well, a faulty battery can cause random reboots, but that shouldn't make your card incompatible. Maybe just you got a bad card (some defects don't show immediately). A good test if your card works properly inside your phone is to copy a high bitrate (>2128kbps) video (any compatible video with said high bitrate will do, even if the Zune software needs to reencode it, since it keeps the bitrate) to your device and trying to play it. If it stutters you've got a bad card.

You can use this one: http://www.megaupload.com/?d=52UEFGN0 (will sync as is, no reencoding required)
[HD7 General] AdamBlue:
So, whenever I would do a factory reset, it would still require the recent HTC firmware update, which would cause the problem between the device and memory card. After upgrading to Mango, any factory reset would keep the device with the latest .68 version.

Doing a factory reset to the latest version with the card inside seemed to solve the problem...for now.
[HD7 General] dorianmuthig:
I'm not exactly sure what you are talking about here... are you talking about the SPL version?
[HD7 General] AdamBlue:
I'm not too familiar with SPL, but I was just noting that a factory reset with the HD7 at 7720.68, keeps it at 7720.68. Updates cause my card to crash after a factory reset, and since no update is needed, I'm fine.
[HD7 General] dorianmuthig:
Yes, if you installed an update to your phone, you essentially flashed a new ROM on the device. If you reset your phone only your personal settings, applications and files will be removed and your phone will be put into a state resembling the state it would be in, if it came with the ROM and/or OS version you updated it to.

If your card crashes after a factory reset, your card may indeed be bad.

Can you try downloading this file: http://www.megaupload.com/?d=52UEFGN0, sync it to your phone using the Zune software and play it on your phone? If it won't play properly, your card is bad or incompatible and you should have it replaced.
[HD7 General] Vito Andolini Corleone:
on quick question, will replacing the 8gb sd card to 32gb sd card slow down the phone?

will the phone be identical in performance before changing the sd card?
[HD7 General] dorianmuthig:
If you get an incompatible or bad card, your phone will get slower or the extended storage space will even cease to work.

If you get a good card, your phone's performance will be the same or even better than before.
[HD7 General] Vito Andolini Corleone:
Thanks a ton for the insight, so basically if I use the recommended cards then my phone's performance will be the same or even better right?
[HD7 General] dorianmuthig:
Yes, that's how it should be. However, I cannot guarantee you that you'll get a working card, since you can no longer know which card type they send to you, because most of them no longer come in retail packaging. Those that do are very rare.
[HD7 General] EricTheViking:
I also tried a Kingston 32Gb class 4, in my HD2. Had to reflash to stock ROM then back to WP7 to get it to work. It runs slow as a dog so have ordered a SanDisk 32gb class 2 to try.
[HD7 General] AdamBlue:
So the movie runs fine, so I think it's a good card that just happened to go bad. I'll go back to the stock 16gb for now, and maybe wait for a new phone or eventually see if there's a universally stable card that for sure works.

Strange that it only happened since the HTC firmware update.
[HD7 General] elyl:
In my experience, with a good card, the performance will be slightly slower. Not terribly slower, but marginally. On odd occasions programs will not open on the first attempt, this is pretty rare though. Apart from that, it runs fine.

I'm hoping there might be some improvements in Mango once it gets a native HD7 version.
[HD7 General] Heechee:
Can you repost the pictures? Thanks :)
[HD7 General] marcox92:
SD Card test

I try to test a new SD card on a HD2 before upgrading my HD7.

I download then movie "Sintel..".

On the HD2 i have only the sound; is it because of the card or of the inappropriate driver on HD2

(it runs well on HD7 with original card)

Where can I read the reference on SD Card ?

Thank you
[HD7 General] mindstormmaster1:
Has anyone else after doing this have it show that it only has 12mb? I just pulled the card out and put it back in to see if that would fix the problem I was having with it and now it boots again, but the sd card says its only 12mb which is mega annoying! Any ideas?
[HD7 General] dorianmuthig:
You've got an incompatible or a bad card and your phone doesn't detect it properly.
[HD7 General] Mr4eyes86:
Well since it looks like the new HTC titan isn't coming to t-mobile and the unbranded one won't work with tmobiles 3g/4g network, I bit the bullet and ordered the SanDisk 32gb card suggested in the first page. Plus I'm not going down in screen size with the HTC radar,which just my luck is the crappy version we're gonna get.ill post up later when I get it if it ended working or not.
[HD7 General] Spyderonline:
...and hopefully, they won't notice that the 'void' sticker has been removed... ;)
[HD7 General] dorianmuthig:
If you need a warranty or don't know where to get the right card, you can have me upgrade your phone for a small fee and I'll repair your phone, if anything goes wrong during the 2 year warranty period you'd normally have. If you're interested, let me know and ask for a quote (memory card prices fluctuate daily).
[HD7 General] chevyrida:
I know I a lil late but this is awesome!!
[HD7 General] Saddi2008:
I use this Micro SD SDHC Ram 32GB TF Card Class 10, it work fine on my HD7 Tmous with last mango 7720.68

Thanks

(See my album)
[HD7 General] Mr4eyes86:
Just tried the 32gb SanDisk suggested in first post and worked flawlessly. Using dft 7720 custom rom
[HD7 General] Ttblondey:
how did you all manage to open the bottom cover without breaking clip?:confused:

edit:

I manage to open the bottom cover atlast and i'm lucky that my void stickeris at the top right screw and the screw has been open 3 times by service centre due to change of the motherboard but it seems that the metallic strip has been uneven although it's not easy to peel off.i don't know whethet it's the service centre or i'm the one that accidentally do that by using 2inch size plastic and shove it in too deeply until it touches thw metallic strip.Is there a way to stick it back the metallic strip once we change the sd card and does it still void the warranty by peeling off the metallic strip?

Thanks
[HD7 General] Ttblondey:
how can we know the class and the number of the compatible sandisk card.
[HD7 General] elyl:
Has anyone who's upgraded to a 32Gb card been able to successfully update to Mango? I'm getting reboots just after first boot, or sometimes an error message that there's a storage card error.

I've changed back to the 16Gb card and it works fine, and it worked mostly fine pre-Mango.

I suspect Mango has tightened the memory card requirements even further, and a lot of people are going to have problems once the update starts rolling out.:(
[HD7 General] korben44:
confirmed 32GB microSD

I just installed a Samsung Class 2 microSD 32GB card in my HD7 without issue. I got the card from another Android phone, the Droid Charge. Just thought I'd let other users know that you don't necessarily need a SanDisk branded card.
[HD7 General] mlococo:
were there pictures that went with this tutorial at one time? Not sure what is meant by lifting the card?
[HD7 General] dorianmuthig:
You don't need a SanDisk branded card, that is true, you do however need a compatible card. The only compatible cards are physically made by Toshiba/SanDisk and Samsung, the latter of which you cannot buy in retail. Many "branded cards" especially those from Kingston are either Samsung OEM, Intel/Micron or Toshiba/SanDisk (they share fabrication) flash, whichever got them the best deal for the batch. Your best odds in finding a compatible card is using SanDisk cards.

There have been no changes in the memory card specifications in Mango. Also, the Mango update for the continental US and Europe isn't out yet. If you have a flawlessly working card in your phone, upgrading will not cause any problems.

You can't. At least not anymore, as the different model numbers now only indicate the sales region (new cards are all class 4 now). You need to perform a read/write throughput test to identify the card's true class conformance and/or if it may work with Windows Phone.

Yes, there were, and there still should be, if there aren't try post #43 in this thread.
[HD7 General] Ttblondey:
So in that case if I buy a 32gb sandisk i might riskthat card might not be compatible with my hd7.I'm in asia.

---------- Post added at 09:16 PM ---------- Previous post was at 09:12 PM ----------

I try to look at the image from Mon Windows Phone ,but seems there's no image appear.
[HD7 General] elyl:
How do you know? I'm not the only person to report their card was working fine until upgrading to Mango. I don't think I'll be the last when it officially launches, either.
[HD7 General] dorianmuthig:
Simple. The developer preview and beta and OEM builds do not exhibit that problem on my upgraded phones.

I have had a lot of "new"-ish class 4 cards that stopped working after a reset of the phone and perform very poorly.

Please see earlier in this thread, where I posted a video file that you can download and sync to your phone. If it plays smoothly on your device, you'll be fine.
[HD7 General] menisck:
I will not risk ... At least not for now.
[HD7 General] elyl:
That's still no proof that the requirements haven't been tightened. All that says is you've got a card that works. It doesn't mean everyone who had a card that was working fine will also work fine after the upgrade.

I reckon there's a good reason HTC didn't take advantage of an easy opportunity to add an extra SKU to their HD7 range and just stick a 32Gb MicroSD card in there (and charge an extra £100 for the privilege) and that's that there is no reliable stock of 32Gb cards available that can meet the requirements of WP7.:(
[HD7 General] boysie:
unfortunatly a perfectly working card can and more then likly will fail soon or later on and in my tests and experiance the card can appear to function correctly for days and some say months but mango seems to being troublesome where it previously was fine.

One Thing I have found for them once it starts to fail, doign a hard reset will not fix the problem, u need to swap out the SD and hard reset, boot, power down, swap SD back to 32GB, hard reset then boot. This is the only way I foudn to force a FULL REFORMAT of the 32GB SD card and thsi is the ONLY way to correct it once it starts to fail. Eventlyually you wont even be able to boot.

I think because the phone mirriors the SYSTEM to the SD card eventually the SD copy or mirror of the system files becomes slow to reterive due to poor performing areas of the card. If you get lucky your card will perform ok for a long ish time and the process above will helkp you fix it for another time periord but its unlikly that you will get much further than a few months on mango or even past a few weeks.

Lets hope 32GB SD cards pick up their game. SANDISK included

Easy way to tell though is with Crystal Disk 3.0 and a single 4GB test run on the 4k test, if you get low score then just save your self the hassel and dont use it, u cant test it after you have used in a wp7 unless you format it with recient nokia.

Boysie:cool:
[HD7 General] dorianmuthig:
If you like, you can send me your phone and I'll upgrade it with a compatible card for you and test that it works to Microsoft's specifications. You even get a warranty on it.

This is incorrect, their supplier (they use SanDisk cards) just couldn't provide them with the right cards (class 4, marked class 0 and compatible) for the right price during design stage which is why they don't offer that option.

This is incorrect. The specifications are the same. If you have a card that meets the specifications, you will be fine for the lifetime of your device.

This is the typical incompatible card behavior. Initial setup takes unusually long and you can't play any video smoothly on the device. If you reset the phone (reset, not reboot) using NoDo or previous with the card inside, it will also no longer use it.

The phone does not mirror any data on the SD card. It creates a JBOD like environment to combine both storage areas. The device and system ROM areas are read only and any change to files in these areas will be stored in other parts of the combined storage area. Reading any such files (settings mostly) requires reading file system data from the combined storage area which is partly or in whole on the SD card, effectively restricting read performance to SD card read performance.

They already did, however there's still old stock around and the inexpensive versions with the old fabrication method.

You don't need a recent Nokia Phone, any Symbian S60 series or newer device will do just fine (some of them may be made by other manufacturers as well, if you're in Russia).
[HD7 General] mondowgs:
Nice guide :)

Will check stores later for Sandisk J35 (asian market) unit. Im from Asia so hopefully I get a J35(A) unit. Thanks for the guide.
[HD7 General] elyl:
Hmm, if you remember, you sent me a card you had tested as compatible. It is that card which is failing.
[HD7 General] dorianmuthig:
It is? You may want to contact SanDisk support and arrange for a replacement under their 5 year warranty, then. If you cover the shipping costs, you can also send it back to me and I'll look into it and replace it.