cgsecurity.org

Posted: **05 Apr 2022, 20:25**

Hello,

I had a RAID 6 containing 10 disks each 2TB in size. Due to some hardware failure in a backpanel I lost the RAID 6 configuration. I managed to re-create the RAID 6 with the 10 disks, but my partition was lost. So I tried your tool and it found my partition, but said the disk seems to small and therefore the partition can't be recovered.

Code: Select all

No partition found or selected for recovery
simulate write!
New geometry
Disk /dev/md126 - 16 TB / 14 TiB - CHS 3906766848 2 4 sector_size=512

Analyse Disk /dev/md126 - 16 TB / 14 TiB - CHS 3906766848 2 4
Bad GPT partition, invalid signature.
Trying alternate GPT
Bad GPT partition, invalid signature.
Current partition structure:
Bad GPT partition, invalid signature.
Trying alternate GPT
Bad GPT partition, invalid signature.

search_part()
Disk /dev/md126 - 16 TB / 14 TiB - CHS 3906766848 2 4

recover_EXT2: s_block_group_nr=0/119232, s_mnt_count=3/22, s_blocks_per_group=32768, s_inodes_per_group=8192
recover_EXT2: s_blocksize=4096
recover_EXT2: s_blocks_count 3907025920
recover_EXT2: part_size 1191436288
Filesystem created: Thu Aug 28 09:14:20 2014
Last mount time:    Tue Jan 24 18:55:43 2017
     Linux filesys. data       285694 31256493053 31256207360 [NAS]
     ext4 blocksize=4096 Large_file Sparse_SB Recover, 16 TB / 14 TiB
This partition ends after the disk limits. (start=285694, size=31256207360, end=31256493053, disk end=31254134784)
Search for partition aborted
Disk /dev/md126 - 16 TB / 14 TiB - CHS 3906766848 2 4
Check the harddisk size: HD jumper settings, BIOS detection...
The harddisk (16 TB / 14 TiB) seems too small! (< 16 TB / 14 TiB)
The following partition can't be recovered:
     Linux filesys. data       285694 31256493053 31256207360 [NAS]
     ext4 blocksize=4096 Large_file Sparse_SB Recover, 16 TB / 14 TiB

Right now I'm running a deep scan to see if other partitions are being found.

Is there anything I did wrong or can I do anything to change the size of my RAID 6 so that the partition fits? Do you need any more information? Help is much appreciated.

Posted: **06 Apr 2022, 10:11**

Here are some additional information.

the RAID is software RAID created by openmediavault

deep search has found the same partition various times with the same result: disk seems too small

Update:

I've added an extra disk to the array. It now consists of 11 disks

testdisk finds the partition and says it can be recovered

testdisk does not show any files, it says file system might be corrupt

Question: Is it safe to restore the partition? After restoring I might use chkdsk to correct the filesystem, right?

Posted: **07 Apr 2022, 19:49**

Unfortunately it did not work. I gave up and cleaned the RAID.

cgsecurity.org

Can't recover Partition "Disk seems too small"

Can't recover Partition "Disk seems too small"

Re: Can't recover Partition "Disk seems to small"

Re: Can't recover Partition "Disk seems too small"