Lowell Gilbert wrote:
"Ronald F. Guilmette" <r...@tristatelogic.com> writes:Nov 15 15:24:17 coredump kernel: ad4: FAILURE - READ_DMA status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=256230591This is *not* necessarily a big deal, despite what your other response told you. Errors on reads do not mean that your drive's bad-sector table is full; only errors on write indicate that. If you can try manufacturer's drive diagnostics, do that. If you can't, then it's harder to fix things up, but not impossible; write back if you really can't use a low-level diag.
Yes -- this is correct. It's possible for a disk to be unable to read a sector, but rewriting the sector would either succeed and leave the sector fully workingagain, or cause it to be remapped in which case the disk will subsequently perform perfectly well[*].
Beyond running the manufacturers diagnostics, as the OP has said he has nothing particularly valuable on the drive, it might be worth running a few passes of dban or similar on the disk --- this will overwrite every part of the platter and should make it abundantly clear if there is a real and persistent problem. If you can't afford to scrub the disk, then just keep it under observation: if the problems recur within a few weeks then yes, definitely RMA that drive. Cheers, Matthew [*] If the error messages have disappeared since, then this has probably already happened. -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW
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