Nov 21, 2014
mount: unknown filesystem type 'LVM2_member'
disk errors or file systems errors are what we sysadmins dread the most. my most recent encounter of one taught me a thing or two:
# lvmdiskscan
# lvdisplay
if you tried to mount the disk using its VG name it might give you the following error:
"mount: special device /dev/[vg_name]/[lv_name] does not exist"
and if you did an:
# lvscan
it might show you that the disk is "inactive", so all you need to do now is make it active!
# modprobe dm-mod
# vgchange -ay
doing another lvscan now should label your disk now as "ACTIVE", so then go ahead now and mount it!
