On Monday 30 June 2003 14:58, Martin Bene wrote: > Hi, > > Administrationg quite a few systems with HW raid controllers, I've come to > really like a feature that seems to be missing from current SW raid: > > Scheduling a (weekly) complete media scan where all surfaces of all drives > get read; in case of read errors a repair is tried: the content for the > failed sector is reconstructed just as if the drive had completely failed > and rewritten to the failed sector; if reading works afterwards, regard the > repair as successfull and continue using the drive. > > Is there any way to do this with SW raid? I truly hate situations where > some sectors on a drive fail silently and you don't notice until a 2nd > drive dies and you find you can't recostruct your raid data becaus of > silent "bitrot". > Hi, /proc/mdstat is to monitor the status of your raid, so when one drive fails it becomes dropped out of the raid-array. Using mdadm you can monitor /proc/mdstat and it even can send you a mail when one of your disks fails. So if you really want to scan your disk once a week, why not running 'dd if=/dev/mdX of=/dev/zero' ? So every block of every raid-disk should become read and the md-driver should automatically drop a failing disk out of the raid. I guess you could even try to repair a disk when it became dropped out of the raid by running some scripts, but since I never trusted any disk that had failed ones, I never worried about it. Bernd - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
