Database Users

[Q] SD Card Encrypted in Mango update process, now won't boot

On my HTC HD2 (T-Mobile LEO) I have been working with several releases of WM7 trying to get to Mango. I was able to get HSPL to 2.08 and the radio to 2.15. I loaded build 7592 and got it fully configured. Everything was great (except if the battery died everything erased and I was forced to reload..never figured what I was missing on that one) but the real problem came when I tried to run the 7720 update. My SanDisk Class 2 16GB card was encrypted in the process and when the phone booted back up after running the RCTtoRTM I got an error that the card had "been changed or wasn't compliant" and the card was useless at that point. I cannot reflash the phone back to a non-encrypted WM7 version because the card is now not usable and I cannot find a tool to de-crypt or format the card over. So now I have a phone that cannot be flashed to Mango, and a 16GB plus a 32GB card that are both Encrypted and unusable. Where do I go from here? I even tried to just reverse everything and get back to stock ROM but witht he Hard SPL I cannot do that (not easily from what I understand).
Help!
If I am posting in the wrong place please don't shoot me, this is my first ever post.

you must upgrade without card if card not compatible (not recognize after mango upgrade)
make hard reset (settings - about - reset)
dont boot to WP7
take out card
turn on phone and upgrade to 7392
again do hard reset (settings - about - reset)
insert card and now upgrade to 7720
this is old trick, dont know who posted first but i salute to him
also you have posts how to unlock card
http://forum.xda-developers.com/showthread.php?t=1250869
http://forum.xda-developers.com/showthread.php?t=1242071
http://forum.xda-developers.com/showthread.php?t=1280293

davetech said:
If I am posting in the wrong place please don't shoot me, this is my first ever post.
Click to expand...
Click to collapse
welcome!
you did not mention magldr. Cant believe it would work without it. Is it installed?

Gave up trying both methods
Thought i go back but When i try to install xbmod NODO rom on the same sd card that i used to install v2 .. The phone keeps rebooting
Do i need a new sd card before nodo will work? As i got no other ways of recovering
Thanks for your advice

Moschino02 said:
Gave up trying both methods
Thought i go back but When i try to install xbmod NODO rom on the same sd card that i used to install v2 .. The phone keeps rebooting
Do i need a new sd card before nodo will work? As i got no other ways of recovering
Thanks for your advice
Click to expand...
Click to collapse
Perlian found a way using Killdisc in linux.
http://forum.xda-developers.com/showthread.php?t=1242071
Sorry it didn't work for you. Must have been sd after all.

Robbie P said:
Perlian found a way using Killdisc in linux.
http://forum.xda-developers.com/showthread.php?t=1242071
Sorry it didn't work for you. Must have been sd after all.
Click to expand...
Click to collapse
no worries friend thanks for your help
will i need to insert a new sd card before flashing another wp7 rom eg xbmob nodo?
anyway i can try xbmobs sd unlock tool to recover?

Moschino02 said:
no worries mate thanks for your help
will i need to insert a new sd card to flash another wp7 rom eg xbmob nodo?
Click to expand...
Click to collapse
If it worked before with NODO, I see no reason after fomatting that it shouldn't work again

i cannot reformat the ones that got runied but if i got a new sd card work right? as the one i had keep rebooting with it installed
another thing the v2 rom is it supposed to be a working rom right? because everytme i installed, it kept freezing when the sd card were still working fine..
xbmod unlock tool states not to reboot BT the cabsender automatically restarts the phone??

Moschino02 said:
i meant inorder to flash nodo all i need is a new sd card right? as the one i had keep rebooting with it installed
another thing the v2 rom is it supposed to be a working rom because everytme i installed, it kept freezing when the sd card were fresh?
Click to expand...
Click to collapse
Definitely seems that a new SD card may solve your problems, especially if you had problems with XBmod's NODO rom as well. But beware, as even "confirmed-working" cards may not work with WP7. I would think hard before splashing out £££ on a 32Gb class4 for a 2 year old phone, which may or may not work

Robbie P said:
Definitely seems that a new SD card may solve your problems, especially if you had problems with XBmod's NODO rom as well. But beware, as even "confirmed-working" cards may not work with WP7. I would think hard before splashing out £££ on a 32Gb class4 for a 2 year old phone, which may or may not work
Click to expand...
Click to collapse
this 32gb working 100%
http://forum.xda-developers.com/showpost.php?p=17935456&postcount=269

you did not mention magldr. Cant believe it would work without it. Is it installed?
Ah yes, forgot to mention that....I am running aMAGLDR v1.13.
So I had the two cards that are locked, my 16GB SanDisk class 2 and a brand new PNY Class 4 32GB. In my efforts to get to Build 7720 I went ahead and just returned the 32GB PNY back to the retail store I bought it at and gave them a little white lie about the reason why the card isn't working..... so they gave me a new card and now I am trying to get the process going again. Build 7592 doesn't want to see any updates to get me to the 7392 build which is where I need to be to get the Mango process started. I looked for a manual way to load 7392 but all I could find was instructions on how to use Zune to do it. And that is getting me no where! I am still working on creating the Linux boot CD to get my 16GB card back though.

I inserted a freshly formated SD card into my hd2 enter magdlr enable& cleared enter USB flasher installed v2 native rom left it on welcome page then installed 7004-7392 via cab sender .phone started set up date and time.sent deviceprovisioning.cab succes open Zune update available to 7403 success checking for updates 7720 available keep getting errors ..thats where I'm at..no hard resets or tricks applied it was that simple took About 40min..

PNY 32GB Class 4 SD card, SanDisk 8GB Class 2 SD Card, SanDisk 16GB Class 2 SD Card. All three are toast now. The KillDisk solution doesn't work for me. Every one of these that gets encrypted and then says it won't work when the phone boots I then run through the KillDisk process and it says its got 3.74GB of space to format and thats it. I cannot get any of them to work, they all break on the first reboot after the 7720 update. Today I spent 12 hours solid working on this. I am pretty much about to give up. Its 2:00am and I am beat. Thanks to all who tried to provide help, but most of the info I got was only 1/2 info.....broken English or missing key points on how to get a particular build loaded first so the rest of the process can complete.
Sorry for the "down" attitude......I am really bummed. Going to go crash now.
I am in the same boat as where I started, can't get back to Stock ROM, I keep getting errors that the SD card is not recognized. Only now I don't have an SD left to boot with....they are all jacked up. Guess that means a quiet weekend!!! LOL..sigh.

davetech said:
PNY 32GB Class 4 SD card, SanDisk 8GB Class 2 SD Card, SanDisk 16GB Class 2 SD Card. All three are toast now. The KillDisk solution doesn't work for me. Every one of these that gets encrypted and then says it won't work when the phone boots I then run through the KillDisk process and it says its got 3.74GB of space to format and thats it. I cannot get any of them to work, they all break on the first reboot after the 7720 update. Today I spent 12 hours solid working on this. I am pretty much about to give up. Its 2:00am and I am beat. Thanks to all who tried to provide help, but most of the info I got was only 1/2 info.....broken English or missing key points on how to get a particular build loaded first so the rest of the process can complete.
Sorry for the "down" attitude......I am really bummed. Going to go crash now.
I am in the same boat as where I started, can't get back to Stock ROM, I keep getting errors that the SD card is not recognized. Only now I don't have an SD left to boot with....they are all jacked up. Guess that means a quiet weekend!!! LOL..sigh.
Click to expand...
Click to collapse
go ask any of your friends if they have Nokia phone, and use theirs to format. tested&working 100%. Nokias are even smart enough to display warning about SD being locked with pin, and only way to unlock is format (because code is generated randomly and preserved only in WP7 data storage)
i retrieved my Kingston SDHC 8gb class 4 that way-and yes it doesn't work well with wp7
now i'm asking you guys, if there is any SD card with 100% success rate on wp7... i'm looking for something cheap (4-8gb, being a college student), and i know about sandisk being most compatible, but some say it did not work for them

stirkac said:
go ask any of your friends if they have Nokia phone, and use theirs to format. tested&working 100%. Nokias are even smart enough to display warning about SD being locked with pin, and only way to unlock is format (because code is generated randomly and preserved only in WP7 data storage)
i retrieved my Kingston SDHC 8gb class 4 that way-and yes it doesn't work well with wp7
now i'm asking you guys, if there is any SD card with 100% success rate on wp7... i'm looking for something cheap (4-8gb, being a college student), and i know about sandisk being most compatible, but some say it did not work for them
Click to expand...
Click to collapse
sandisk 4 GB class 4 dont work in mango(nodo ok)

mvinceti said:
sandisk 4 GB class 4 dont work in mango(nodo ok)
Click to expand...
Click to collapse
that's exactly my point.
who got mango running and on which sd?

if SD card not working in mango, read my post
http://forum.xda-developers.com/showpost.php?p=17952270&postcount=2
also if you want enormous memory with 32 GB sd card, i recommended this:
http://forum.xda-developers.com/showpost.php?p=17935456&postcount=269

Replacing memory card on Yuki XBmod V2

Hey, I want to upgrade memory card, now I have some sandisk 2Gb, regular card... and I want to have little bit more space and speed...
So, how can I replace this card without resetting the phone and loosing all of my apps and settings? is there any trick?
Thank you

Angelus1984 said:
Hey, I want to upgrade memory card, now I have some sandisk 2Gb, regular card... and I want to have little bit more space and speed...
So, how can I replace this card without resetting the phone and loosing all of my apps and settings? is there any trick?
Thank you
Click to expand...
Click to collapse
you are going to have to hard reset the phone anyway. You could try to (B)ackup and send any inoffensive cab using cab sender beforehand, but because of the different size it probably wont work (no harm trying though, especially if your bigger card is incompatible, then you can (R)estore to your 2Gb).
If you haven't named your phone 5 times in zune then it will restore your apps though not your games progress (search, it may now be possible, same for SMS)
Oh i nearly forgot, if you want your 2Gb card useable again you might want to add a partition and storage unlock it (but do it after you (b)ackup) unless you know someone with a nokia

thanks m8 ) I have now 8GB Adata class 2, and it's not working really good, sometimes it just appears message that this card is changed, fault or something and I need to do hard reset... I also have sandisk 2GB original, and it was working quite good, until today, it show me same error as Adata, after I pooled out my SIM card -.- I guess I will have to buy another card...
Anyways thank you for your answer and help

look in this topic for find compatible cards
http://forum.xda-developers.com/showthread.php?t=914780

Nice info, i´m about to do the same and this just helped me.. thanks.

dxdy said:
look in this topic for find compatible cards
http://forum.xda-developers.com/showthread.php?t=914780
Click to expand...
Click to collapse
Hi, yeah I know about that thread, I bought Adata 16GB class 10 earlier today and it's working fine for now, hope it will stay this way.
al svejedno, hvala ti

Robbie P said:
you are going to have to hard reset the phone anyway. You could try to (B)ackup and send any inoffensive cab using cab sender beforehand, but because of the different size it probably wont work (no harm trying though, especially if your bigger card is incompatible, then you can (R)estore to your 2Gb).
If you haven't named your phone 5 times in zune then it will restore your apps though not your games progress (search, it may now be possible, same for SMS)
Oh i nearly forgot, if you want your 2Gb card useable again you might want to add a partition and storage unlock it (but do it after you (b)ackup) unless you know someone with a nokia
Click to expand...
Click to collapse
good point op im dual booting with 4gb but i need to upgrade
let me get this straight all we have to do is stick a new sd card in and hard reset?? is that all? i got nothing to back up by the way??
i presume we have to set up dual boot through storage lock etc

Moschino02 said:
good point op im dual booting with 4gb but i need to upgrade
let me get this straight all we have to do is stick a new sd card in and hard reset?? is that all? i got nothing to back up by the way??
i presume we have to set up dual boot through storage lock etc
Click to expand...
Click to collapse
Yes, new card in then hard reset.
If you want the smaller one back, you have to send the smallest (1Gb) partition and storage unlock it first. Then new card in and hard reset. your new card will have the same partition set up on it, you will have to remove this first if you want to try and (R)estore. Then set up any size partition you want.
At least I think you have to have a partition on your SD for storagelock to open. Somebody might try just storage-unlocking the sd and check on pc whether it is readable (200mb).

Unlocking SD

Im Tired Of Restarting My Phone Because It Keep Freezing. Im Trying to Unlock My SD Card. I Don't Have A Nokia Phone Laying Around And I Tried Going To A Location Phone Store, They Just Act Like Ass Hole. I was thinking about using Xbmod CAB but i dont know what the steps are anyone mind helping me out,
I have a Sandisk 8 Gig.
Pls Help.

Does Anyone One Know How To Use The Xbmod Cab to unlock SD.

http://forum.xda-developers.com/showthread.php?t=1286511
Check this link...have you got mango?

Yes i have mango.

The process is fairly simple, however, I doubt it will solve your freezing problems.
Once you have Mango, send a DEV_STORAGELOCK .CAB to your phone using the Cab Sender, the process also installs the .cab, so when it is completed and the phone restarts and the transfer is checked, you will have a tile with Storagelock (I know, the name is somewhat misleading). That is the program that will unlock your card when used. You have to remember though that the unlock will work only until you restart your WP7, as it locks your card again and you will have to unlock it every time you want to use it.

Thanks I Got That Step Down. I Want to unlock my whole SD card. I sent the 8_extraportion but i cant unlock it i keep getting "Fail Toggling Card".

From my experience, most freezing and glitches comes from incompatible cards. I think other users had problems of that nature and reported certain brands to fail or cause problems during or after install or update.
I installed the DEV_STORAGELOCK .cab first, hard reset from startup, rather than 'about' menu, unlock, then sent the partition cab, another hard reset. Check the 'about' in settings, it will tell you if the partitioning has been successful.
Try the whole process again. Can't say I ever had the same error message before, so not sure how to proceed.

iKilla said:
Thanks I Got That Step Down. I Want to unlock my whole SD card. I sent the 8_extraportion but i cant unlock it i keep getting "Fail Toggling Card".
Click to expand...
Click to collapse
don't try to put an 8Gb partition onto an 8Gb sd card, or you will leave no room for mango to work and you will get errors.
So you need to send extrapart-remove.cab to get rid of 8gb partition
Put a 1 Gb partition on it, unlock the storage then use your pc to resize and format your sd

I sent the 1g_extrapart. How do I resize it on PC?

download easeus partition master
find your sd on the screen by plugging it in and clicking refresh (arrows), your sd should show up as disk 2 or 3 and should have two sections FAT32 and unformatted.
right click on the unformatted section and choose delete then click on "apply"(or tick) button above
right click on your 1 gb FAT32 partition and chose resize
move the slider(click and hold on the separating bar between the two partitions) to increase the size to the whole volume then click apply
right click on the volume again and choose format primary,FAT32, 32kb sectors then apply.
That should do it.

I Love You Such Much In A Friendly Way My SD Card Is Unlock And I Have The Full Size. You The Best Help. And Also @enigma1nz Thank For Helping Me Out.
Thanks For Helping Me Out.

SD card isn't recognized.

After attempting to follow the confusing steps in the xbmod-yuki rom my phone froze mid-update and my sd card spazzed out and now my phone says there is no sd in the slot when its in there....I can't connect to computer either.
SD Formatter can't even detect it.

nvm figured it out my self, plus i posted in the wrong section.

Sd Card Woes
pteradactyle said:
nvm figured it out my self, plus i posted in the wrong section.
Click to expand...
Click to collapse
Would you mind sharing what you did to fix your SD? I'm having an issue related to Mango, don't know if it's the same as yours, but I'm trying to explore all avenues.

simpleton681 said:
Would you mind sharing what you did to fix your SD? I'm having an issue related to Mango, don't know if it's the same as yours, but I'm trying to explore all avenues.
Click to expand...
Click to collapse
Care to explain what the issue is exactly with your SDcard, to keep the topic as clean and efficient as possible?

I have same problem
I have same problem.
pteradactyle said:
After attempting to follow the confusing steps in the xbmod-yuki rom my phone froze mid-update and my sd card spazzed out and now my phone says there is no sd in the slot when its in there....I can't connect to computer either.
SD Formatter can't even detect it.
Click to expand...
Click to collapse

KrewsialNL said:
Care to explain what the issue is exactly with your SDcard, to keep the topic as clean and efficient as possible?
Click to expand...
Click to collapse
Sorry, yes. I installed WP7 Mango (XBmod-Yuki rom V2), SD card was formatted and locked. I removed WP7 without knowing this would happen, and now I can't get the card to be recognized in Windows, Linux, OSX, or any of my other devices that support MicroSD. Been searching for a fix, but it looks like I'll need to find a Symbian device to format the card.
After I posted before, I was able to reinstall the original WP7 rom and the card was recognized after a hard reset, but I'm not having any luck getting the unlock cab to work. Actually, now, after trying to send the cab to my device, restarting with the card in the phone or doing a hard reset results in the phone just not loading the OS.
Sorry for being long winded, but I'm just about out of ideas. Thanks for any help

simpleton681 said:
Sorry, yes. I installed WP7 Mango (XBmod-Yuki rom V2), SD card was formatted and locked. I removed WP7 without knowing this would happen, and now I can't get the card to be recognized in Windows, Linux, OSX, or any of my other devices that support MicroSD. Been searching for a fix, but it looks like I'll need to find a Symbian device to format the card.
After I posted before, I was able to reinstall the original WP7 rom and the card was recognized after a hard reset, but I'm not having any luck getting the unlock cab to work. Actually, now, after trying to send the cab to my device, restarting with the card in the phone or doing a hard reset results in the phone just not loading the OS.
Sorry for being long winded, but I'm just about out of ideas. Thanks for any help
Click to expand...
Click to collapse
The way I fixed that is an aweful thing to do, but it worked.
1. Flash to stock Windows Mobile 6.5 (with locked SDcard in there)
2. Task29
3. Install MAGLDR
4. FLASH WP7 (still, with that same SDcard in there)
After it's flashed, do not update, but take the card out and stick it in a card reader (hell, even the magldr >> usb storage function works).
Windows will detect 200 MB on that card. Format it with SDformatter and it will be good again.
Note: That specific card is not compatible with WP7 MANGO, so don't try to use that ever again ;-)
It took me a week to figure this out, but i successfully managed to revive my 8GB Sandisk Class 4 card, which I now will use in my camera instead of the HD2
Hope this helps!

AWESOME!
KrewsialNL said:
The way I fixed that is an aweful thing to do, but it worked.
1. Flash to stock Windows Mobile 6.5 (with locked SDcard in there)
2. Task29
3. Install MAGLDR
4. FLASH WP7 (still, with that same SDcard in there)
Click to expand...
Click to collapse
I'm going to try this, but I'm wondering which WP7 Rom you flashed. I originally was using the Yuki Update rom, then once all the badness happened, I flashed to a much older one, then back to Yuki. However, in each of those cases, I never got the 200MB partition. Anyway, I'm giving this a shot, will let you know. Thanks!

If you want only format the SD card
http://forum.xda-developers.com/showthread.php?t=912528

hautsi said:
If you want only format the SD card
http://forum.xda-developers.com/showthread.php?t=912528
Click to expand...
Click to collapse
Hi hautsi, welcome to the forum.
Unfortunately the thread you posted, dated January, only works for the pre-mango ROMS (and possibly XBmod/Yuki V1)
Look here for SD format http://forum.xda-developers.com/showthread.php?t=1242071
also Krewsia1nl's method should be posted there

No Dice
Robbie P said:
Hi hautsi, welcome to the forum.
Unfortunately the thread you posted, dated January, only works for the pre-mango ROMS (and possibly XBmod/Yuki V1)
Look here for SD format http://forum.xda-developers.com/showthread.php?t=1242071
also Krewsia1nl's method should be posted there
Click to expand...
Click to collapse
Hey again all,
It's possible there's something else wrong with my card at this point. I tried Krewsia1nl's method and it seemed like it might work, but I still never got any additional partitions that my PC could recognize. I tried it a couple of times, 12st with an older WP7 rom I found in the HD2 WP7 dev section, and 2nd with the original Yuki rom I was flashing. Same issue in both cases.
What I did find is that I can see the card in the Yuki rom after flashing, BUT if I restart the device, it freezes, I have to remove the card to be able to boot it, and when it reboots, it tells me I must insert the card to continue. Great...
This also poses a problem with unlocking the card in WP7 with the unlock or partition cabs. To install them, the cab sender restarts your device. Once that happens, my phone freezes and I have to remove the card. All subsequent attempts to reboot or reinsert the card are met with either nothing recognized, or an error (It's also important to note that I can only see the card on first boot after following Krewsia1nl's method-if I try to hard reset with the card in, the phone just keeps freezing).
So, for now, that's where I'm at. I'm going to try the UBCD Killdisk method and I'll report whether or not that works, in case anyone finds themselves in this particular, sinking boat. Killdisk Method is here:
http://forum.xda-developers.com/showthread.php?t=1280293
Thanks again for your help, all. Love XDA <3

Killdisk didn't work either. Guessing my card is fried, but I'll still try a Nokia if I can find one.

I also tried to install Yukis Mango 7720 but not with good result.
Does this 7720 work in any HD2...
Ubuntu doesn't do anything if you add your WP7 SD card to reader.
Win7 shows that you have "Removable Disk" but if you try to access it Windows says "unable something....".
I thought that I have also two fried SD card because this 7720 testing.
But Nokia E51 format successfully both cards )

i have an old Nokia 3650 and a few cards that mango has ruined. Now if I can just find the plug for the nokia......wonder if it will format them ?

Just got my 32 class 4 SanDisk in the mail. How do I release the card in tmous hd2 and add 32 to set up dual boot droid. Reflash from start.... Awww lawd! Took all night! Can I hard rest with no card and do it with cabssnder to partition card and card unlock and party with rum tonite?
Sent from my HD2 using XDA Windows Phone 7 App

Btway.... Xda devs and forum participants could teach the worldwide manufacturers a thing or two about the way it's done. Thanks to all.
Sent from my HD2 using XDA Windows Phone 7 App

hautsi said:
I also tried to install Yukis Mango 7720 but not with good result.
Does this 7720 work in any HD2...
Ubuntu doesn't do anything if you add your WP7 SD card to reader.
Win7 shows that you have "Removable Disk" but if you try to access it Windows says "unable something....".
I thought that I have also two fried SD card because this 7720 testing.
But Nokia E51 format successfully both cards )
Click to expand...
Click to collapse
Can you tell me what SD Card did you manage to unlock?
I tried an E63 for my Sandisk Class 4 32Go unsuccessfully

What an absolute disaster the BTTF Yuki rom is...It is inevitable, most will lose their sd cards, it cost me $45 to replace. Could we put a BIG warning up for these roms, GUARANTEED to destroy your SD card? Because it will, at some point for sure, you will reload the rom and that's when the fun starts..AVOID AT ALL (cough) Costs...

evereste said:
What an absolute disaster the BTTF Yuki rom is...It is inevitable, most will lose their sd cards, it cost me $45 to replace. Could we put a BIG warning up for these roms, GUARANTEED to destroy your SD card? Because it will, at some point for sure, you will reload the rom and that's when the fun starts..AVOID AT ALL (cough) Costs...
Click to expand...
Click to collapse
You are completely entitled to your opinion and to post it here.
Many people have successfully upgraded to Mango and have not posted here at all.

Robbie P said:
You are completely entitled to your opinion and to post it here.
Many people have successfully upgraded to Mango and have not posted here at all.
Click to expand...
Click to collapse
I'm sorry, did not intend to knock the rom, the rom is excellent, the concern, it will ultimately cause you much duress as to the sd card at some point, that's my only point. Not many folk expect to lose the sd card after installing... and reinstalling...yes, there are work arounds, but, they entail, much ado and worst case, nokia.kodaj devices...there should be a MASSIVE warning as to SD card...yes, the small print offers cabs and tinkering to avoid the 'lock', but most of us don't expect any such chicanery.-)

[Q] Help Needed Please - Storage Card Not Working

Hi,
After a long history with successful 6.5 updates I thought I'd try WM 7!
I've read the storage card posts and tried a hard reset both with my card and without but always get to the same Storage Card not working error.
I don't have a Nokia to reformat my card but have tried reformatting on the PC.
There is a bit I haven't been able to follow using magdlr 'services' option - how do i stop WM7 from booting and get back to the magdlr menus?
Some advice for a noobie please - don't want to brick my phone but not that fond of the Storage Card Not Working screen either!

thebearhack said:
Hi,
After a long history with successful 6.5 updates I thought I'd try WM 7!
I've read the storage card posts and tried a hard reset both with my card and without but always get to the same Storage Card not working error.
I don't have a Nokia to reformat my card but have tried reformatting on the PC.
There is a bit I haven't been able to follow using magdlr 'services' option - how do i stop WM7 from booting and get back to the magdlr menus?
Some advice for a noobie please - don't want to brick my phone but not that fond of the Storage Card Not Working screen either!
Click to expand...
Click to collapse
I'm sorry to hear about your issues. The micro SD card you've fit in your phone is too slow to cope with the constant read/write imposed by the OS.
The card you've used is unusable unless you unlock it by sending the unlocker cab to your device, unlock it, then format it on your computer. You could also format it on a symbian, nokia device.
Unless you mention the specific part number of your micro DS and brand, I can't help you further, with regards to compatibility, however, some models are proven to work flawlessly on WP7 powered HD2. ( such as sandisk 32 GB)
Make sure to further research, and hopefully you get this sorted out

only old Yuki (Back to the future) ROM lock cards...
all new ROM's not lock cards and unlocking or formatting with nokia device not necessary
if card not working: simple, not supported.. you must buy new card...
you cant brick phone... just read my install tutorial from signature if you something dont know...

Thanks for advice.
For benefit of others the symptoms I had were down to initial install. I needed to use Magldr to free up last 24 of nand memory and then reflash. Now all working.
As ever none of the stickies quite cover everything, but your help and another google session saved the day.
Thanks to the developers! WP7 giving my phone an all new feel.