mount: unknown file system type LVM2_member
Posted on December 9, 2016 • 2 minutes • 296 words • Suggest Changes
So I’m planning on making a series, “mount: unknown file system type $TYPE”. I already have how to mount a ntfs partition, also how to mount a nfs on proxmox, now to be continued by another fun file system. I was going through old disks, so I came across one that had LVM2_member.
root@svennd:~# mount /dev/sdd2 /mnt/disk mount: unknown filesystem type 'LVM2_member'
The fdisk -l already told me it is a LVM :
root@svennd:~# fdisk -l /dev/sdd Disk /dev/sdd: 233.8 GiB, 251000193024 bytes, 490234752 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 Disklabel type: dos Disk identifier: 0x0009345d Device Boot Start End Sectors Size Id Type /dev/sdd1 * 63 208844 208782 102M 83 Linux /dev/sdd2 208845 488247479 488038635 232.7G 8e Linux LVM
_ (/dev/sdi1 is /boot partition, /dev/sdi2 is where the /home data resides)
Seems lvm2 tools also provide a way to check if it is lvm or not, using **lvmdiskscan **(/dev/sdd2 here)
root@svennd:~# lvmdiskscan /dev/sdb1 [ 1.82 TiB] /dev/sdc2 [ 149.04 GiB] /dev/sdd1 [ 101.94 MiB] /dev/sdd2 [ 232.71 GiB] LVM physical volume 0 disks 4 partitions 0 LVM physical volume whole disks 1 LVM physical volume
Fine, now let’s scan what lv’s (logical volumes) are to be found using lvscan
root@svennd:~# lvscan inactive '/dev/VolGroup00/LogVol00' [230.75 GiB] inherit inactive '/dev/VolGroup00/LogVol01' [1.94 GiB] inherit
Since this is an old disk in an enclosure, it is not activated on system boot. So we need to “activate” this lvm volume.
root@svennd:~# vgchange -ay 2 logical volume(s) in volume group "VolGroup00" now active
and bam, ready to mount :
root@svennd:~# lvscan ACTIVE '/dev/VolGroup00/LogVol00' [230.75 GiB] inherit ACTIVE '/dev/VolGroup00/LogVol01' [1.94 GiB] inherit
now to mount :
mount /dev/VolGroup00/LogVol00 /mnt/disk