Linux - mount: /mnt/ssd: unknown filesystem type 'LVM2_member'

Good day,

today my drive crashed on which Kubuntu had been running for several years. While working, I received messages that the system was read-only. I made a basic ssd backup at runtime, but not everything is there.

After the reboot, the system did not charge, I only got on the busybox. So I installed Kubuntu on a new disk and then decided to get the data from ssd.

The connection of the luks partition was successful via cryptsetup, but mount does not work:
sudo mount /dev/mapper/ssd /mnt/ssd
mount: /mnt/ssd: unknown filesystem type 'LVM2_member'.

Checking via fsck and e2fsck did not find any errors. Thanks for the help

REPLY

In the end, I managed mount successfully with this sequence of commands and the backup was successful:

lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 111,8G 0 disk
├─sda1 8:1 0 731M 0 part
├─sda2 8:2 0 1K 0 part
└─sda5 8:5 0 111,1G 0 part
└─ssd 253:2 0 111,1G 0 crypt
sdb 8:16 0 931,5G 0 disk
├─sdb1 8:17 0 512M 0 part /boot/efi
├─sdb2 8:18 0 1K 0 part
└─sdb5 8:21 0 931G 0 part /
sdc 8:32 0 1,8T 0 disk
└─sdc1 8:33 0 1,8T 0 part
└─md7 9:7 0 1,8T 0 raid1
└─data 253:1 0 1,8T 0 crypt /mnt/data
sdd 8:48 0 1,8T 0 disk
└─sdd1 8:49 0 1,8T 0 part
sde 8:64 0 2,7T 0 disk
└─sde1 8:65 0 2,7T 0 part
└─iscsi 253:0 0 2,7T 0 crypt /mnt/iscsi


-----------------------------
sudo mount -o ro /dev/mapper/ssd /mnt/ssd
mount: /mnt/ssd: unknown filesystem type 'LVM2_member'.


--------------------------------
sudo lvmdiskscan
sudo: lvmdiskscan: command not found
sudo apt install lvm2


----------------------------------
sudo lvmdiskscan
/dev/mapper/iscsi [ <2,72 TiB]
/dev/sda1 [ 731,00 MiB]
/dev/mapper/data [ <1,82 TiB]
/dev/mapper/ssd [ 111,07 GiB] LVM physical volume
/dev/sda5 [ 111,07 GiB]
/dev/md7 [ <1,82 TiB]
/dev/sdb1 [ 512,00 MiB]
/dev/sdb5 [ 931,01 GiB]
/dev/sde1 [ <2,72 TiB]
2 disks
6 partitions
1 LVM physical volume whole disk
0 LVM physical volumes


----------------------------------
sudo lvscan
inactive '/dev/kubuntu-vg/root' [110,11 GiB] inherit
inactive '/dev/kubuntu-vg/swap_1' [980,00 MiB] inherit


----------------------------------
sudo vgchange -ay
2 logical volume(s) in volume group "kubuntu-vg" now active


----------------------------------
sudo mount -o ro /dev/kubuntu-vg/root /mnt/ssd


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ls /mnt/ssd
bin dev initrd.img lib64 mnt root snap tmp vmlinuz
boot etc kdeinit5__0 lost+found opt run srv usr vmlinuz.old
cdrom home lib media proc sbin sys var