Sunday, March 6, 2011

Corrupted Disk Volume Information.

Well there is a good news and a bad news.
Bad news is: I corrupted volume info of my external USB Harddisk.
Good News: I just recovered.

So to begin with the story, I had to take backup of my laptop data because I have a plan remove Windows Vista (aka A crap) and install Windows7( a better crap). While taking backup i had to remove my external drive, but it dint allow. So the last option, Pull the cable. So far so good.

OK. So lets resume, Plug the cable and OHHH CRAPPPPP. All drives are gone except the laptops internal drives. Now what?

Seagate Manager: Disk is not formatted. want to format? No Way.
Device Manager: Disk drives-> Seagate FreeAgent USB Device->Properties->Volumes->Populate and "Cannot populate volume information".

Ok lets boot in linux and "sudo fdisk -l /deb/sdb". Thank God. Looks like "All is well". 4 partitions.
mount says "device was not shutdown properly. use -o force". Fine. mount /dev/sdb1 /media/Software and Yes. Its all right.

Try again in Windows. No good.
Then please help google "fins drive partiotion". Got EASEUS Partition Revovery. Install->Select Drive->Scan and everything is fine. all drives are there but no drive letters. but you cannot go furthure because "there are no lost partitions".
Now what? Google again. Active@ Partition Recovery for DOS. A 16bit useless program.
But gotta do something about it. Google again "Cannot detect drive partitions". and open http://ubuntuforums.org/archive/index.php/t-742689.html. What? Ubuntu forums to solve Windows problem? I know a bit strange place, but YeaahHHooooo. It worked. Gotta a link to http://www.cgsecurity.org/wiki/TestDisk. 
A tiny Open Source utility. That mostly means "I don't have to pay".
So lets check this out.
Run and a got devices in linux style. /dev/sda and /dev/sdb. Then go for "Analyse"->Quick Search. Gonna take a really long time (for 1 TB  USB HDD).
And finally 2 Partitions. No way. There were 4 :'(.
OK lets do a "Deep Search". Now this gonna take a really very long time.
Anyway got 8 items in the list.
2 for Unpartitioned Harddisk.
2 Previously Deleted partiotions.
and The 4 actually required. All marked as deleted.
Now select the partitions that need to be kept and press arrow keys (left/right) to change. (Primary/Logical/...).
Write Disk structure to disk and Done.
Reconnect and YES YES YES. Now can an go to a very nice sleep. Good night.

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