USB Unformatted when it was fine not 2 hours ago

[Jonathan183]

backup using dd command directly or using a backup application - I use the clonezilla live CD for hard drive backups.

[dalinux_n00bie]

so after a deep scan in testdisk, when selecting the Intel partition option, this is what i get:

TestDisk 6.8, Data Recovery Utility, August 2007
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org

Disk /dev/sdb - 8021 MB / 7649 MiB - CHS 1023 247 62

     Partition                  Start        End    Size in sectors


No partition found or selected for recovery



[  Quit  ]
                              Return to main menu

is there an other way to manuely start MBR rebuilding?

[Jonathan183]

I have not tried this but it may help ... backup first !
Once you have partition recovered check if files already exist ... if they don't then you can then run testdisk again to search for files.
Good luck ...

ED:btw do you know the disk partition structure - was it a single fat partition ?

[dalinux_n00bie]

i now get this:

Partition table entries are not in disk order

Disk /dev/sdb: 8019 MB, 8019509248 bytes
247 heads, 62 sectors/track, 1022 cylinders
Units = cylinders of 15314 * 512 = 7840768 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System

In TestDisk I selected [None] instead of [intel/PC] and in advance i changed the FS to FAT32, and it rebuild the partition table, so now all i get is a superblock error when i want do mount the drive.

[Jonathan183]

What does fdisk -l report ... are all cylinders allocated to the single partition. For a new flash drive (4GB) I got 1063 cylinders, start at 1 and end at 1064 with system W95 FAT32 (LBA).

[dalinux_n00bie]

That was fdisk -l...

[Jonathan183]

That was fdisk -l...

But is does not show any partitions ... but notes below indicate fat32 partition

[dalinux_n00bie]

But is does not show any partitions ... but notes below indicate fat32 partition

I did a repair of my fat32 system.... and now i'm getting a bad_root_sector when I scan it...... I think i totally killed it....

[Jonathan183]

Did you backup the disk ... so you can restore the previous status ? If you did now would be a good time to restore.


If you don't have a backup ... how did you repair the fat32 partition ?