Why does SAN LUN with ext4 file system fail to mount?
Issue
- Not able to mount SAN lun with ext4 filesystem.
# mount /dev/mapper/mpatha /mnt
mount: wrong fs type, bad option, bad superblock on /dev/mapper/mpatha,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
- Running dmesg|tail shows:
EXT4-fs (sdc): ext4_check_descriptors: Checksum for group 3936 failed (43645!=0)
EXT4-fs (sdc): group descriptors corrupted!
Environment
- Red Hat Enterprise Linux 6
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