Factory Reset on Hd2 with Windows 7 - HD2 Windows Phone 7 Q&A, Help & Troubleshooting an

So just a quick question:
I want to do a hard reset because I used one live ID email to sync but I actually should have used my other email, linked to my Xbox Live.
So if I do a hard reset, will it just stay on Windows 7 or would I have to go through the whole ordeal again putting Windows 7 on my Hd2? Because that wouldn't be worth it.
Thanks!

No its on nand!!!!!!
so it will hard reset into windows phone again so dont worry and it will delete everything off ur sd card make sure to sync with zune first

Cool. what does nand mean exactly?

NAND literally means Not And, Idk what does that exactly mean but it simply means the internal storage of a device (i.e. not sd card)
Next time post in the correct section please

Related

THE SDHC EncFiltLog file CORRUPTION SOLVED

PROBLEM:
Now, the problem all started when try to format the micro SDHC on the phone or on the PC with card reader.
Tried with differ format program also low level not worked.
DONT USE THESE!!! Waste of time!!!
SOLUTION:
So after doing some thinking about the situation, I figured that there was a problem with the card inserted and find the file EncFiltLog on it.
It is the WM 6.1 encription file. You can't delete, move files from or in to the SDHC.
The best way to solve this issue, as the hard-reset DOES NOTHING to fix this issue, would be to have windows hopefully find the connected device and format it. Here are the EASY steps which DO NOT involve using a dozen computers and has provided the same result EVERY time; which is a working on my 8gig memory in my HTC HD.
1. Connect the HD to the computer and select DISK DRIVE as the option on the on-screen popup on your phone. Don’t select ACTIVE SYNC. If you miss it, then go into your phone and press START>SETTINGS>CONNECTIONS TAB>USB to PC and select the bullet of DISK DRIVE and hit ok.
2. On your computer, (USING A WINDOWS XP MACHINE), go into your "My computer"
3. A window for will open with two columns.(If not, change the view to "Group") We are looking at the RIGHT side right now. In there is has three categories, and we are only focusing on ONE of them. LOOK for STORAGE which should be the center category.
4. Click with right to the desired "Storage device; A: ; D: E;", it will take a minute or two depending on your computer speed and environment to populate your hard drive and connected memory devices.
5. You will eventually see your PHONE internal storage listed. IT WILL TAKE SOME TIME BECAUSE YOUR PHONE INTERNAL STORAGE IS CORRUPTED!
***BE SURE WHAT YOU ARE LOOKING AT IS IN FACT YOUR PHONE AND NOTHING SOMETHING ELSE LIKE YOUR MAIN HARD DRIVE OR SOME OTHER STORAGE DEVICE WITH IMPORTANT FILES ON THERE***
****I TAKE NO RESPONSIBILITY IF YOU FORMAT THE WRONG DEVICE***
6. Choose format and let it format the drive. This should also take a few minutes. Select FAT32 and name is whatever you want! Let this finish COMPLETLY!
**Your almost done**
7. Now you can copy, anything you want on it, but if you put again in to the PDA then the
EncFiltLog will come on again. But at least you not have to throw away the card,
you can use it again.
8. Finally my last comment:
If you want to speed up the card (.cab installation, copy, move ...etc.....)
the best way after all this work listed above, you should made a BACKUP from all your PERSONALITIES and
make a HARD RESET.
After it should speed up all the programs and processions with the card.
If you done then one IMPORTANT THING!:
YOU SHOULD NEVER EVER TAP ON THE CARD ENCRIPTION IN THE SETTINGS,
NOT EVEN THINK ABOUT IT!!!!!!
Hope this helps you all out!!
BTW: I want to say thanks to XDA-FORUM (all people) to make my life easier
and to found the right gadgets to use, to play and enjoy it....
Wow - not bad at all for a first post!
Welcome to the forum!
Thanks for providing a solution!
krnkris said:
PROBLEM:
Now, the problem all started when try to format the micro SDHC on the phone or on the PC with card reader.
Tried with differ format program also low level not worked.
DONT USE THESE!!! Waste of time!!!
SOLUTION:
So after doing some thinking about the situation, I figured that there was a problem with the card inserted and find the file EncFiltLog on it.
It is the WM 6.1 encription file. You can't delete, move files from or in to the SDHC.
The best way to solve this issue, as the hard-reset DOES NOTHING to fix this issue, would be to have windows hopefully find the connected device and format it. Here are the EASY steps which DO NOT involve using a dozen computers and has provided the same result EVERY time; which is a working on my 8gig memory in my HTC HD.
1. Connect the HD to the computer and select DISK DRIVE as the option on the on-screen popup on your phone. Don’t select ACTIVE SYNC. If you miss it, then go into your phone and press START>SETTINGS>CONNECTIONS TAB>USB to PC and select the bullet of DISK DRIVE and hit ok.
2. On your computer, (USING A WINDOWS XP MACHINE), go into your "My computer"
3. A window for will open with two columns.(If not, change the view to "Group") We are looking at the RIGHT side right now. In there is has three categories, and we are only focusing on ONE of them. LOOK for STORAGE which should be the center category.
4. Click with right to the desired "Storage device; A: ; D: E;", it will take a minute or two depending on your computer speed and environment to populate your hard drive and connected memory devices.
5. You will eventually see your PHONE internal storage listed. IT WILL TAKE SOME TIME BECAUSE YOUR PHONE INTERNAL STORAGE IS CORRUPTED!
***BE SURE WHAT YOU ARE LOOKING AT IS IN FACT YOUR PHONE AND NOTHING SOMETHING ELSE LIKE YOUR MAIN HARD DRIVE OR SOME OTHER STORAGE DEVICE WITH IMPORTANT FILES ON THERE***
****I TAKE NO RESPONSIBILITY IF YOU FORMAT THE WRONG DEVICE***
6. Choose format and let it format the drive. This should also take a few minutes. Select FAT32 and name is whatever you want! Let this finish COMPLETLY!
**Your almost done**
7. Now you can copy, anything you want on it, but if you put again in to the PDA then the
EncFiltLog will come on again. But at least you not have to throw away the card,
you can use it again.
8. Finally my last comment:
If you want to speed up the card (.cab installation, copy, move ...etc.....)
the best way after all this work listed above, you should made a BACKUP from all your PERSONALITIES and
make a HARD RESET.
After it should speed up all the programs and processions with the card.
If you done then one IMPORTANT THING!:
YOU SHOULD NEVER EVER TAP ON THE CARD ENCRIPTION IN THE SETTINGS,
NOT EVEN THINK ABOUT IT!!!!!!
Hope this helps you all out!!
BTW: I want to say thanks to XDA-FORUM (all people) to make my life easier
and to found the right gadgets to use, to play and enjoy it....
Click to expand...
Click to collapse
Yesterday it happens for the second time that my SD-Card gets corrupt again, the first time it happens with a 8 Gb SDHC Sandisk and now with a 16 Gb.! After a hard-reset.Didn't know before I read this post that this could happen ever!??
And indeed I couldn't write or read on the card or format it again, even with a cardreader!
Both cards are useless about €120,- thrown away, gone
Didn't know before I read this post, that this is an WM 6.1 encription issue. Never used or even tap it.
Now I format another 8Gb like the way you describe here, i hope that when i need to do another hard-reset i can use the card again!
BTW, its a little bit strange to me that there are so little reaction from other users here about EncFiltLog problem?
I hope that there will come a solution in WM 6.1 to prevent that b!llsh!t.
Thanks for the great support, i hope it realy works!
Nice post
I have one more question:
What may happen when I delete this encryption file? Is it possible?
P.S. Sorry for my english :/
Hi Everyone!
The best way, if you purchase a new card, to FORMAT at first.
Then you put in to your phone and try not to teke it out any more.
If you want to use it as USB reader the as I write in my first post
START>SETTINGS>CONNECTIONS TAB>USB to PC and select the bullet of DISK DRIVE and hit ok .
In this case you can use the phone as a card reader.
It is speed up the file transfer vs. ACTIVESYNC.
If the card is not recognised ether way then,
because of the too much taking out - - put it back; went to faulty.
You can go back to the store for guarantee replacement.
The EncFiltLog is a problem only if you encrypted the card.
The solution to delete it and use as new card described in my first post.
If you put a new card in to the Phone then this file seem to be created by the OP system.
You can delete with format, but it will come back again and again.
krnkris said:
You can delete with format, but it will come back again and again.
Click to expand...
Click to collapse
Your right, the file is still there again!
But I have also a question about a next( hope not) hardreset on my device!
Is it better to format the SD-card (with USB on the device) before or after the hard-reset to save the further use of the card?
Because in my experience you have to start installing everything over again, because the data on the card was anyway corrupt and useless.
It is NOT recommended to use the MS Windows Format command to re-format any SDHC card - it will format them, of course, but with the wrong cluster size, slowing access speed down and possibly causing other problems.
I would suggest to always use a tool like Panasonic's SD Formatter when formating any kind of SD card. You can get it here: http://panasonic.jp/support/global/cs/sd/download/sd_formatter.html
-Valynor
Valynor said:
It is NOT recommended to use the MS Windows Format command to re-format any SDHC card - it will format them, of course, but with the wrong cluster size, slowing access speed down and possibly causing other problems.
I would suggest to always use a tool like Panasonic's SD Formatter when formating any kind of SD card. You can get it here: http://panasonic.jp/support/global/cs/sd/download/sd_formatter.html
-Valynor
Click to expand...
Click to collapse
Also good to know, but does it also prevent or solve that EncFiltLog problem?
Is there no registry tweak to turn off or delete that W 6.1 encryption option anyway?
luckyuser said:
Also good to know, but does it also prevent or solve that EncFiltLog problem?
Is there no registry tweak to turn off or delete that W 6.1 encryption option anyway?
Click to expand...
Click to collapse
No as far as I know.
Will creating a read-only, hidden folder called "EncFltLog.menc" on the card prevent this problem?
Phil_123 said:
Will creating a read-only, hidden folder called "EncFltLog.menc" on the card prevent this problem?
Click to expand...
Click to collapse
What do you mean?How do you do?
HI folks, glad to find some peeps who are suffering from the same problem...
The solution here seems not to work for me, as I hard-reset my TouchHD before I found out about that encryption ****up...
Is there any solution that allows you to reformat the card?
Not to mention that I NEVER touched that damn encryption option as I really never trust M$ that far with my data... seems it got me Pwned anyways...
Anyone ever tried to Write M$, tell them what a bunch of wacky Ho's they are and demand a new miniSD Card from them?
sorry for my language but atm I mad as hell as I just lost a 8GB and a 16GB sanDisk...
I experienced a lot of bc during all the yaers messing with M$ stuff but this ****up ins unbelievable...
I had the same problem with my 8gb sandisk.
I would like to add that I was able to retrieve most of my files from the memory card using EASEUS Data Recovery Wizard Professional. You need to do the data recovery before attempting to reformat the card.
Hi guys sorry for messing around in your forum but this post is the closest solution to my problem. I cannot format or save anything to my 16gb sandisk card because of that bloody encryption file. Now the problem is that I'm a Kaiser user and I do not have disk mode in my phone, so has anyone successfully formatted their card without using disk mode?
one very quik question. Does this fix the problem for good? you can use the sdhc card with the phone or will it always end up with menc file?
card unreadable in one night
Yesterday, my sdhc 8gb card was working properly but in just one night something happened to it. In the morning, I came to know that it is not more being recognized by htc hd2. Every time I soft reset or hard reset the phone a message come up saying "Do you want to format this storage card to make it readable? this will permanently delete any files on the card." when I click no nothing happens and phone keeps on working and if I click yes then the card is formatted in just 1 second. I tried formatting the card myself from phone format tool (there is format card tool in tools section of the phone) but it is showing only 30.61 mb instead of 8gb.
After reading this thread, I think the problem is with EncFiltLog. Actually I backup my phone and card yesterday with sprite backup. I also backup EncFiltLog on my pc. Now after hard resetting the phone I delete the newly created EncFiltLog file by the fresh WM 6.5 installation after hard reset. I deleted that file from my pc by using the phone card storage as disk drive instead of activesync and simply shift+delete the file from removable storage in My computer. After that I copied all the phone card backup (including EncFiltLog - old one) on the freshly hard reset phone. Now all of sudden in just one night phone sdhc card is not able to recognized by phone.
Moral of the story: Never backup EncFiltLog. Keep the newly created EncFiltLog file by wm 6.5 after hard reset and copy your all files and folder from card backup to phone card (excluding EncFiltLog) after a hard reset. Don't ever overwrite the newly created EncFiltLog.menc file with old one from backup.
Reason: I think WM 6.5 pairs the newly created EncFiltLog with its some key on phone internal storage. Remember how encryption works? I am talking about public key and private key pairing. I think WM6.5 pairs one key stored in EncFiltLog with another key stored inside the phone interal storage which is itself freshly created after the hard reset but when we copy the old EncFiltLog from storage card backup to freshly hard reset phone storage card, those key pairs won't match anymore and windows mobile 6.5 simply locks up the card.
it is my own opinion.
One more clue
Ok guys, I've got one more clue after googling and reading other threads on this forum. May be HTC is supplying fake 8gb sdhc card with hd2.
I've came on that conclusion because yesterday there was more than 5 gb space left on my phone storage card. In the night RSS Hub software has updated all the feeds and stored those feeds on storage card (I've set feeds to be stored on storage card). I think something has been gone wrong there. May be the actual capacity of this fake storage cards in far less than what is written/claimed on the card (i.e. 8gb). In the night as soon as the RSS Hub stored feed on the card, it somehow corrupted the card FAT writting its data on sectors of the card where it should not be.
Hence the card is corrupted now just showing 30.61 mb instead of 8gb. There exists no solution for this situtation till now. I've sent mail to HTC regarding this on their customer support page. Let's see what would happen now. I suspect either HTC or my dealer would say that the storage card don't come under warranty. Let's see now. I will update the thread soon.
My problem is the same.....
after HSPL I faced "Do you want to format this storage card to make it readable?..." and after that I lost my mSD.
Format Storage Card didn't worked. it shows 30.61MB , Cluster Size: 0KB
also Clear Storage didn't worked...
System > Memory > Storage Card > Total storage card memory: Not installed
Is there any other way to fix this problem? because of my country, it is difficult to use HTC Service...

16 hours and I have only one issue left.. memory card is only being recogised 200mb

I have been at this for 16 odd hours and have overcome wifi probs, activation probs, chevvy issues.. done 3 flashes of wp7, radio updated.. all is grand now but the memory card issue!
Please, someone allow me to go to bed by explaining how I can format the card to show more than 200mb?!
I have taken the card out, formatted on my pc, reformatted with other tools, am stuck, and have spent the last hour searching through threads for info I had earlier but can no longer find! it doesnt help that any search containing "SD" is ignored as xda search sees it as too small a word.
Who wants some good Karma?
I really dont get why this topic is been creating/cloned etc on a regular basis??
Please use search function, this topic has been discussed many times.
Use some commen sense, dont look for "SD", use keywords like "WP7" and "200" or "200mb", "partition" etc. Or even reading the readme that came with the WP7 rom would be a good start
Why not help me instead of witholding what you know and making me forrage around one hell of a mess of a forum to find information I have been searching for since this afternoon????????
from the read me, and i quote "WARNING: WP7 will format the SD card during the first boot.
Two SD card partitions are created during cold boot.
First one is a 200Mb FAT partition and another one with unknown format which
is used as RAID with main memory."
That doesnt explain how to change the RAID partition into physical memory I can access from the device...
xandercom said:
I have been at this for 16 odd hours and have overcome wifi probs, activation probs, chevvy issues.. done 3 flashes of wp7, radio updated.. all is grand now but the memory card issue!
Please, someone allow me to go to bed by explaining how I can format the card to show more than 200mb?!
I have taken the card out, formatted on my pc, reformatted with other tools, am stuck, and have spent the last hour searching through threads for info I had earlier but can no longer find! it doesnt help that any search containing "SD" is ignored as xda search sees it as too small a word.
Who wants some good Karma?
Click to expand...
Click to collapse
Here is what you need to do:
Make sure your SD card is in the phone
Do a factory reset by going to settings>About>Reset your phone.
After WP7 reboots, it will recognize your card and all the date.
You will have to re-enter your Activation code.
changochulo said:
Here is what you need to do:
Make sure your SD card is in the phone
Do a factory reset by going to settings>About>Reset your phone.
After WP7 reboots, it will recognize your card and all the date.
You will have to re-enter your Activation code.
Click to expand...
Click to collapse
Thanks for the advice.
Is there any way this can be done outside of the device? I have heard that I can get an SD formatting tool but whatever one I downloaded did nothing to help.
I am reluctant to do the 4th hard reset of the day for this OS as a) there is talk of the auth code working only 3 times, and b) I have everything else working now and dont want to tempt fate!
Is it only a WP7 hard reset that will resolve this for me now?
:-(
Thanks in advance of your help my man!!
also, wont a hard reset undo all of the unlocking and such from chevvy?
xandercom said:
also, wont a hard reset undo all of the unlocking and such from chevvy?
Click to expand...
Click to collapse
Im pretty sure it will undo the unlocking, but it only takes a few minutes to go thru it again once you have everything downloaded.
Hard reset number 5 it is then!!
It didnt save my settings on the mem card, obviously as it wasnt in there in the first place during the previous hard reset.
Im becoming a master at hard resets and personalisation now!
that's not gonna help, , the first time it boots its gonna again make a 200meg partition and the rest create a raid.
download a partition program (there are loads, personally i have a ubuntu laptop and use that, you could also make an ubuntu live cd, boot to that and delete teh partition there.
through Ubuntu...
phone into magldr, usb mass storage, connect to Ubuntu, the 200meg filesystem icon will soon appear on the desktop, right click, format, instead of clicking ok click disk utility, select the 200 partition and click unmount then click delete, then select the unknown partition, and click delete.
if you are going back to android now would be a great time to set up an ext partition if you want one.
If you are sticking with wp7, then you can't format it to show more than 200meg, that's all that wp7 allocates to the fat partition, all the rest goes to system storage. Messing with the disk (even removing it whilst wp7 is running, i believe) will trash the data on the card and wp7 will reformat it.
If you are heading back to wm then create a fat32 partition the full size of the card.
samsamuel said:
that's not gonna help, , the first time it boots its gonna again make a 200meg partition and the rest create a raid.
download a partition program (there are loads, personally i have a ubuntu laptop and use that, you could also make an ubuntu live cd, boot to that and delete teh partition there.
through Ubuntu...
phone into magldr, usb mass storage, connect to Ubuntu, the 200meg filesystem icon will soon appear on the desktop, right click, format, instead of clicking ok click disk utility, select the 200 partition and click unmount then click delete, then select the unknown partition, and click delete.
if you are going back to android now would be a great time to set up an ext partition if you want one.
If you are sticking with wp7, then you can't format it to show more than 200meg, that's all that wp7 allocates to the fat partition, all the rest goes to system storage. Messing with the disk (even removing it whilst wp7 is running, i believe) will trash the data on the card and wp7 will reformat it.
If you are heading back to wm then create a fat32 partition the full size of the card.
Click to expand...
Click to collapse
Sam,
Ive already tried this and it worked for me. Im just going off my experience.
samsamuel said:
that's not gonna help, , the first time it boots its gonna again make a 200meg partition and the rest create a raid.
download a partition program (there are loads, personally i have a ubuntu laptop and use that, you could also make an ubuntu live cd, boot to that and delete teh partition there.
through Ubuntu...
phone into magldr, usb mass storage, connect to Ubuntu, the 200meg filesystem icon will soon appear on the desktop, right click, format, instead of clicking ok click disk utility, select the 200 partition and click unmount then click delete, then select the unknown partition, and click delete.
if you are going back to android now would be a great time to set up an ext partition if you want one.
If you are sticking with wp7, then you can't format it to show more than 200meg, that's all that wp7 allocates to the fat partition, all the rest goes to system storage. Messing with the disk (even removing it whilst wp7 is running, i believe) will trash the data on the card and wp7 will reformat it.
If you are heading back to wm then create a fat32 partition the full size of the card.
Click to expand...
Click to collapse
Actually, it has done the trick, however now I am back to having a locked device again and cant deploy apps from my pc. Back to where I was 6 hours ago.
All I want is space to store more than 4 apps before the dang thing runs out of space.
Time to grab a beer me thinks.

[Q] [q] help! Win7 installed- sd card ruined

i managed to get win7 running & followed all the steps to activate live except for calling microsoft which i plan to do in the morning but i have realized when installing win 7 it didnt integrate my sd card, so i now have hardly any space left...is there anything i can do to fix this? will i need to uninstall win 7 , reinstall 6.5 then reinstall win 7? there has got to be an easier way right? any way to get a new sd card? i am new to this ..any help would be greatly appreciated
When botting WP7 hold vol up and down then vol down do a hard reset with the memory in it you gonna have to do eveything again but you wont have to istallled it
so if i do that reset will i be back to a win6.5 phone or will it have saved the win7 os & hspl files etc.
saragene said:
so if i do that reset will i be back to a win6.5 phone or will it have saved the win7 os & hspl files etc.
Click to expand...
Click to collapse
You are effectively doing a factory reset of WP7 so it will boot to a virgin copy of WP7.
As to whether you could replace the SD card and have it work properly from a hard reset, not sure. I know WP7 seems to use the card as an extension to the file system but I'd have thought that it did this as part of the install process so if you find a card that plays nicely with WP7 you'd still need to reinstall. Not certain though.

Install WP7 on 2Gb SD, I want to upgrade to 8 GB

So, here's the deal.
In all my excitement about installing WP7 on my HD2, I completely forgot about a fact that I have only 2 Gb card in my phone!
So, now I want to get 8 Gb card, BUT.
My phone is all set up and tweaked.
So what will happen if I put new card and do reset?
Will I be able to get my settings back? What about contacts and accounts?
What about activation... stupid as I am, I didn't write down activation key from Microsoft!
Any chance to get same activation key from phone or maybe from Zune / Windows?
So any idea how to upgrade in painless way??
Thanks!
pigo1973 said:
So, here's the deal.
In all my excitement about installing WP7 on my HD2, I completely forgot about a fact that I have only 2 Gb card in my phone!
So, now I want to get 8 Gb card, BUT.
My phone is all set up and tweaked.
So what will happen if I put new card and do reset?
Will I be able to get my settings back? What about contacts and accounts?
What about activation... stupid as I am, I didn't write down activation key from Microsoft!
Any chance to get same activation key from phone or maybe from Zune / Windows?
So any idea how to upgrade in painless way??
Thanks!
Click to expand...
Click to collapse
This is going to be very difficult as while flashing windows partitions your sdcard. So I highly doubt if you could do the same on your 8gb card other than reflashing everything back to scratch. Should you decide to reflash from scratch I suggest you use the custom DFT ROM. Its hassle free, the built in tweaked Chevron and modified registry makes flashing, installing and setting it painfree.
I suggest you do the following steps,
Task 29 with Radio 2.15
MAGLDR 1.13
Uninstall Zune before you connect the device to pc
Flash DFT custom ROM
Reinstall Zune after you've set the device up and when it prompts you
pigo1973 said:
So, here's the deal.
In all my excitement about installing WP7 on my HD2, I completely forgot about a fact that I have only 2 Gb card in my phone!
So, now I want to get 8 Gb card, BUT.
My phone is all set up and tweaked.
So what will happen if I put new card and do reset?
Will I be able to get my settings back? What about contacts and accounts?
What about activation... stupid as I am, I didn't write down activation key from Microsoft!
Any chance to get same activation key from phone or maybe from Zune / Windows?
So any idea how to upgrade in painless way??
Thanks!
Click to expand...
Click to collapse
Both Easeus Partition and MiniTool Partition Wizard can copy partitions, so i would suggest you simply copy the 2GB SD partitions across to the new 8GB.
(no i haven't tried myself sorry)
jigners said:
I suggest you do the following steps,
Task 29 with Radio 2.15
MAGLDR 1.13
Uninstall Zune before you connect the device to pc
Flash DFT custom ROM
Reinstall Zune after you've set the device up and when it prompts you
Click to expand...
Click to collapse
curious to know why un-installing Zune? - i-ve re-flashed wp7 several times and zune's never had an issue syncing with them...
Canterbury said:
Both Easeus Partition and MiniTool Partition Wizard can copy partitions, so i would suggest you simply copy the 2GB SD partitions across to the new 8GB.
(no i haven't tried myself sorry)
So, Easeus Partition and MiniTool Partition CAN see SD card with WP7 "file system"?
I ask, bacuse, when I put SD card from phone to computer it is unreadable.
If those programs can see files, then I'm saved.
Click to expand...
Click to collapse

[Q] Small dualboot question

I've been running wp7 on my hd2 for awhile now and recently wanted to dualboot it to android.. looking at the guides I'm not quite sure about this, will using the partition managers format my data currently held on wp7?
I don't want to lose my texts or contacts and I don't want to have to call ms again for another activation code since I seem to have lost the notepad doc I saved it in xD
I may be wrong but I think it will remove what is on your card already. You can always buy a second SD card and use it to run Android from, just dont boot to WPY with that SD card in the device or it will format it for use with WP7.
how big is your card? you should at least be using a 16gig card if you want to DB, but 8gig is still fine BUT all your files/ data will be erased since you need to reset the phone. Alternatively just like what T-Macgnolia said, get a 2nd card & place the SD ROM there & boot from magldr.
this is what i followed - again yesterday - for my friends HD2's dual Boot system.
remember that the partition for Windows should be a little larger than that of the Andy.
http://www.jayceooi.com/2011/02/10/...hone-7-and-android-on-htc-hd2-with-1-sd-card/
as long as you do things right all will be OK but wrongly done You WONT boot into WP7 again as the partition will be corrupted.
What I do is Get another SD card & make an exact mirror/ copy of the one i use for WP7 so if one fails I still have a backup. Before proceeding though make sure that Both Cards do boot into WP7. check out the link below, it might help.

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