Hi
I'm trying to salvage some data from disk from a raid I didn't assemble. This is the only disk that has information on. It gets picked up ok as a linux ext4 raid partition in gparted. I was expecting to see raid 5 over four disks, sadly not - the other disks have gpt partitions but report as being unallocated in gparted and gdisk.
Any suggestions as to what to try next in finding a superblock?
Thanks
Bryan
<i>Filesystem volume name: inscribe_data1
Last mounted on: <not available>
Filesystem UUID: 95c359b0-66bf-4394-89da-4d7866a92475
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 122101760
Block count: 488378368
Reserved block count: 24418918
Free blocks: 480664949
Free inodes: 122101749
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 907
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 16
Filesystem created: Thu Aug 28 13:57:16 2014
Last mount time: n/a
Last write time: Thu Aug 28 14:01:42 2014
Mount count: 0
Maximum mount count: 33
Last checked: Thu Aug 28 13:57:16 2014
Check interval: 15552000 (6 months)
Next check after: Tue Feb 24 12:57:16 2015
Lifetime writes: 29 GB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: 8c787fea-f93e-453d-ac45-d49a339628ab
Journal backup: inode blocks</i>
<i>dumpe2fs 1.41.12 (17-May-2010)
Journal superblock magic number invalid!</i>
<i>Unable to read the contents of this file system!
Because of this some operations may be unavailable.
The cause might be a missing software package.
The following list of software packages is required for ext4 file system support: e2fsprogs v1.41+.</i>
[root@igmimager sbin]# ./gdisk /dev/sdn
GPT fdisk (gdisk) version 0.8.10
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): ?
b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu
Command (? for help): p
Disk /dev/sdn: 3907029168 sectors, 1.8 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): E6755AAC-5295-4417-BA21-E1016486CBDB
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 3907029134
Partitions will be aligned on 2048-sector boundaries
Total free space is 2157 sectors (1.1 MiB)
Number Start (sector) End (sector) Size Code Name
1 2048 3907028991 1.8 TiB FD00
Command (? for help): i
Using 1
Partition GUID code: A19D880F-05FC-4D3B-A006-743F0F84911E (Linux RAID)
Partition unique GUID: 911F59F3-AB98-4A40-9F0B-B191B5C5010E
First sector: 2048 (at 1024.0 KiB)
Last sector: 3907028991 (at 1.8 TiB)
Partition size: 3907026944 sectors (1.8 TiB)
Attribute flags: 0000000000000000
Partition name: ''
Command (? for help):