ext3_abort

on a linux machine I was experiencing this error

hdc: task_in_intr: status=0x59 { DriveReady SeekComplete DataRequest Error }
hdc: task_in_intr: error=0x40 { UncorrectableError }, LBAsect=155768546, sector=155768546
ide: failed opcode was: unknown
end_request: I/O error, dev hdc, sector 155768546

Seems definitely an hardware error, but I've some reasonable doubts about drivers.

...but then, after some trivial operations on computer, this error appeared, locking the system drive "ro" and causing many errors operationals errors:

EXT3-fs error (device dm-0): ext3_find_entry: reading directory #19432083 offset 0
Aborting journal on device dm-0.
journal commit I/O error
ext3_abort called.
EXT3-fs error (device dm-0): ext3_journal_start_sb: Detected aborted journal
Remounting filesystem read-only
ext3_abort called.

a reboot solved, almost temporary the problem...