Additional stuff letting me hope for a valid array: # grep md /var/log/messages Aug 26 11:22:02 horde mdadm[3739]: RebuildFinished event detected on md device /dev/md/1 Aug 26 11:22:02 horde mdadm[3739]: SpareActive event detected on md device /dev/md/1, component device /dev/sdb3 Aug 26 11:22:02 horde mdadm[3739]: RebuildStarted event detected on md device /dev/md/2 Aug 26 12:12:02 horde mdadm[3739]: Rebuild20 event detected on md device /dev/md/2 Aug 26 12:42:53 horde kernel: ata1.00: cmd 25/00:00:b5:73:12/00:04:28:00:00/e0 tag 0 dma 524288 in Aug 26 12:42:59 horde kernel: ata1.00: cmd 25/00:00:b5:73:12/00:04:28:00:00/e0 tag 0 dma 524288 in Aug 26 12:43:05 horde kernel: ata1.00: cmd 25/00:00:b5:73:12/00:04:28:00:00/e0 tag 0 dma 524288 in Aug 26 12:43:09 horde kernel: ata1.00: cmd 25/00:00:b5:73:12/00:04:28:00:00/e0 tag 0 dma 524288 in Aug 26 12:43:12 horde kernel: ata1.00: cmd 25/00:00:b5:73:12/00:04:28:00:00/e0 tag 0 dma 524288 in Aug 26 12:43:15 horde kernel: ata1.00: cmd 25/00:00:b5:73:12/00:04:28:00:00/e0 tag 0 dma 524288 in Aug 26 12:43:19 horde kernel: ata1.00: cmd 25/00:08:fd:73:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:22 horde kernel: ata1.00: cmd 25/00:08:fd:73:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:25 horde kernel: ata1.00: cmd 25/00:08:fd:73:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:28 horde kernel: ata1.00: cmd 25/00:08:fd:73:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:31 horde kernel: ata1.00: cmd 25/00:08:fd:73:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:34 horde kernel: ata1.00: cmd 25/00:08:fd:73:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:34 horde kernel: md/raid1:md2: sda: unrecoverable I/O read error for block 643686144 Aug 26 12:43:34 horde kernel: md: md2: recovery done. Aug 26 12:43:37 horde kernel: ata1.00: cmd 25/00:08:35:74:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:41 horde kernel: ata1.00: cmd 25/00:08:35:74:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:44 horde kernel: ata1.00: cmd 25/00:08:35:74:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:47 horde kernel: ata1.00: cmd 25/00:08:35:74:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:50 horde kernel: ata1.00: cmd 25/00:08:35:74:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:53 horde kernel: ata1.00: cmd 25/00:08:35:74:12/00:00:28:00:00/e0 tag 0 dma 4096 in Aug 26 12:43:54 horde kernel: md/raid1:md2: sda: unrecoverable I/O read error for block 643686272 Aug 26 12:43:54 horde mdadm[3739]: RebuildFinished event detected on md device /dev/md/2 -- 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