On Sat, 18 Aug 2012, Chris Murphy wrote:
If the affected chunk is rebuilt from parity (or copy in case of mirror), does md raid issue a write command to write the rebuilt chunk back to the disk at the same LBAs? If so, shouldn't this force the drive to determine if the sector error is transient or persistent, and if persistent the disk firmware will remap the bad sector to a reserve sector?
If I remember correctly from what has been described here before, a read error will cause a re-write with information created from parity, and the drive should figure it out (either is successfully writes the new information to the existing sector, or if it can't, it writes it to a spare sector (re-map)). If it throws a write error, the drive is kicked from the array (because a drive with write errors is clearly defective).
So yes, you're correct in your assumption from what I know. -- Mikael Abrahamsson email: swmike@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
