Server Fault Asked on January 25, 2021
I have an ubuntu server that i had to restart on rescue mode and i am trying to mount a partition to reset the root password. I followed the instruction of the hosting company but got stuck and haven heard from them
When i try to do
mount /dev/sda1 /mnt/
i got this error:
mount: unknown filesystem type 'linux_raid_member'
This is the output of fdisk -l
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009307f
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 20973568 10485760+ fd Linux raid autodetect
/dev/sda2 20973569 1952468992 965747712 fd Linux raid autodetect
/dev/sda3 1952468993 1953520064 525536 82 Linux swap / Solaris
Disk /dev/md2: 988.9 GB, 988925591552 bytes
2 heads, 4 sectors/track, 241436912 cylinders, total 1931495296 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md2 doesn't contain a valid partition table
Disk /dev/md1: 10.7 GB, 10737352704 bytes
2 heads, 4 sectors/track, 2621424 cylinders, total 20971392 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md1 doesn't contain a valid partition table
How can i mount the disk?
Your RAID devices are called /dev/md1 and /dev/md2. It's possible that these contain your filesystems; you could try:
mount /dev/md1 /mnt
Or:
mount /dev/md2 /mnt
Depending on how your system is configured it is also possible that these devices are themselves part of a larger virtual device. If you're unable to mount the individual devices, let us know and we'll work from there.
For more information about Linux software RAID, start with this document.
Correct answer by larsks on January 25, 2021
I recently found a way to complete this and it's not too complicated.
I found this article, which helped out considerably. https://ahelpme.com/linux/recovering-md-array-and-mdadm-cannot-get-array-info-for-dev-md0/
I ran these commands and had success.
sudo mdadm --assemble --scan --verbose
sudo cat /proc/mdstat
once you figure out which disk you want to mount...
mount /dev/md# /mnt/point
Answered by Patrick on January 25, 2021
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