On Thu, Nov 4, 2010 at 1:52 PM, <madworm_de.dirv...@spitzenpfeil.org> wrote: > On 04.11.2010 18:41, Dale Amon wrote: >> I've had USB connected drives appear to be failing >> but then work fine after powering down and reconnecting >> them.
Could happen... >> I've also had a drive that did not have good enough >> air flow and appeared to have failed... but after I >> got another cooling fan in the enclosure it worked >> fine and the 'bad' sectors even went away. > And you dare use it as a backup drive? > > 'Self-healing' bad sector errors... but maybe I'm just paranoid. Do SATA > drives do bad sector remapping, and do they do it well? Who knows... Certainly they do. I recommend checking the SMART firmware status by running smartctl -a /dev/sdd or skdump /dev/sdd On more recent kernels they can interrogate most disks across the USB bus as well as the standard ATA-attached disks. Look for Reallocated_Sector_Ct and especially Current_Pending_Sector : the former shows hard errors that were recovered by replacing the bad sector by a spare; the latter shows presently occurring errors that could not yet be repaired. _______________________________________________ Dirvish mailing list Dirvish@dirvish.org http://www.dirvish.org/mailman/listinfo/dirvish
