On Oct 17, 2012, at 10:27 AM, Mathias Burén wrote: > [419246.582409] end_request: I/O error, dev sde, sector 2343892776 > [419246.582492] md/raid:md0: read error not correctable (sector > 2343890728 on sde1). > [419246.582502] md/raid:md0: read error not correctable (sector > 2343890736 on sde1). > [419246.582511] md/raid:md0: read error not correctable (sector > 2343890744 on sde1). > [419246.582519] md/raid:md0: read error not correctable (sector > 2343890752 on sde1). > [419246.582527] md/raid:md0: read error not correctable (sector > 2343890760 on sde1). > [419246.582535] md/raid:md0: read error not correctable (sector > 2343890768 on sde1). > [419246.582543] md/raid:md0: read error not correctable (sector > 2343890776 on sde1). > [419246.582552] md/raid:md0: read error not correctable (sector > 2343890784 on sde1). > [419246.582560] md/raid:md0: read error not correctable (sector > 2343890792 on sde1). > [419246.582568] md/raid:md0: read error not correctable (sector ... > > You can see the first start of the reshape, then sde started freaking out. A lot more than just 5 sectors. I'd replace the drive and the cable. If it's under warranty, have it replaced. If not, maybe ata secure erase it, extended offline smart test, and use it down the road for something not so important if it passes without further problems. So basically, replace the dead sda drive ASAP so it can start rebuilding. I'd consider marking sde faulty so that it's neither being reshaped or rebuilt and then replace it once the new sda is rebuilt. You can probably replace them both at the same time and have them both rebuilding; but I'm being a little conservative on how many changes you make until you get yourself back to some level of redundancy. Chris Murphy-- 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