2011/2/14 compdoc <compdoc at hotrodpc.com>: >> end_request: I/O error, dev sda, sector 451792231 > > You should run: smartctl -a /dev/sda > > Look for something like this line: > > Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 > > If that last value is greater than 0, replace the drive... Value is 0, on both drives. -- Eero