Получилось! Правда не sda, а sdb и пришлось размонтировать раздел, но это уже мелочи. Вот вывод консоли, может кому пригодится :)
[root@localhost ~]# fsck -pvy /dev/sdb2
fsck из util-linux 2.22.1
/dev/sdb2 contains a file system with errors, check forced.
/dev/sdb2: Unattached inode 21685
RECONNECTED.
/dev/sdb2: Inode 21685 ref count is 2, should be 1. FIXED.
434153 inodes used (13.55%, out of 3203072)
1250 non-contiguous files (0.3%)
182 non-contiguous directories (0.0%)
# of inodes with ind/dind/tind blocks: 0/0/0
Extent depth histogram: 412325/329/1
6366457 blocks used (49.74%, out of 12799744)
0 bad blocks
1 large file
373625 regular files
38535 directories
16 character device files
4 block device files
4 fifos
16123 links
21932 symbolic links (21438 fast symbolic links)
28 sockets
------------
450266 files
[root@localhost ~]#