dmesg | tail
[ 825.808350] EXT4-fs (sda2): ext4_check_descriptors: Checksum for group 3 failed (56246!=71)
[ 825.808358] EXT4-fs (sda2): group descriptors corrupted!
[ 842.881246] EXT4-fs (sda2): ext4_check_descriptors: Checksum for group 3 failed (56246!=71)
[ 842.881249] EXT4-fs (sda2): group descriptors corrupted!
[ 1207.178812] EXT4-fs (sda2): ext4_check_descriptors: Checksum for group 3 failed (56246!=71)
[ 1207.178817] EXT4-fs (sda2): group descriptors corrupted!
[ 1211.328962] EXT4-fs (sda2): ext4_check_descriptors: Checksum for group 3 failed (56246!=71)
[ 1211.328965] EXT4-fs (sda2): group descriptors corrupted!
[ 1242.319455] EXT4-fs (sda2): ext4_check_descriptors: Checksum for group 3 failed (56246!=71)
[ 1242.319458] EXT4-fs (sda2): group descriptors corrupted!
e2fsck /dev/sda2
[root@localhost liveuser]# e2fsck /dev/sda2 -a
/dev/sda2: One or more block group descriptor checksums are invalid. FIXED.
/dev/sda2: Group descriptor 3 checksum is 0x0047, should be 0xdbb6.
/dev/sda2: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
(i.e., without -a or -p options)