Parece que eu estava errado sobre isso ser um problema de algum outro lugar, na verdade não era um problema de corrupção! Corrigido via esta resposta :
% bl0ck_qu0te%wim@wim-ubuntu:~/Desktop$ df -h | grep sdc
/dev/sdc1 1.8T 1.7T 352M 100% /media/data
wim@wim-ubuntu:~/Desktop$ sudo tune2fs -l /dev/sdc1 | grep 'Reserved block count'
Reserved block count: 24418900
wim@wim-ubuntu:~/Desktop$ sudo tune2fs -m 0 /dev/sdc1
tune2fs 1.41.14 (22-Dec-2010)
Setting reserved blocks percentage to 0% (0 blocks)
wim@wim-ubuntu:~/Desktop$ sudo tune2fs -l /dev/sdc1 | grep 'Reserved block count'
Reserved block count: 0
wim@wim-ubuntu:~/Desktop$ df -h | grep sdc
/dev/sdc1 1.8T 1.7T 94G 95% /media/data
% bl0ck_qu0te%