unable to recover partition

How to use TestDisk to recover lost partition
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Posts: 2
Joined: 03 Sep 2012, 16:06

unable to recover partition

#1 Post by sdm900 »


I ran test-disk (from cents 6-3 live cd) and successfully detected the partition I wanted to recover and mark it as primary

TestDisk 6.14-WIP, Data Recovery Utility, September 2012
Christophe GRENIER <grenier@cgsecurity.org>

Disk /dev/sdc - 3000 GB / 2794 GiB - CHS 364801 255 63
Partition Start End Size in sectors
D MS Data 2048 1026047 1024000
D Linux LVM 1026048 5860532223 5859506176
>P Linux Raid 194560034 5860532777 5665972744 [3]

Down the bottom it even says

md 1.x L.Endian Raid 6 - Array Slot : 4 (0, 1, 2, 3, 4), 2900 GB / 2701 GiB

which is exactly correct. I recover the partition, reboot and parted tells me the partition now exists

Model: ATA Hitachi HUA72303 (scsi)
Disk /dev/sdc: 5860533168s
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number Start End Size File system Name Flags
1 194560034s 5860532777s 5665972744s raid



[root@livedvd ~]# mdadm -E /dev/sdc1
mdadm: No md superblock detected on /dev/sdc1.

so, it appears that test disk sort of sees the partition but is unable to recover it correctly? Any ideas?

Posts: 83
Joined: 08 Sep 2012, 06:58

Re: unable to recover partition

#2 Post by Lito »

It looks like that parted (gparted? or parted magic?) gives the disk as sdc and not sdc1. Or may be is not important?
My other thought is: a raid partition is meant to be a mirror of another disk. Am I wrong?
If nothing is wrong with the data in your working disk, what is the point in trying to recover the mirror partition?
Did your machine stopped booting?