This is fascinating. It reminds me of Star Trek calm conversation in control center during laser shooting on enemy spaceship. :) hda: read_intr: status=0x59 { DriveReady SeekComplete DataRequest Error } hda: read_intr: error=0x40 { UncorrectableError }, LBAsect=1521738, sector=1501515 end_request: I/O error, dev 03:05 (ide), sector 1501515 raid1: Disk failure on hda5, disabling device. Operation continuing on 1 devices kmalloc called nonatomically from interrupt 0000002c raid1: md0: rescheduling block 750757 dirty sb detected, updating. md: updating md0 RAID superblock on device hdb5 [events: 00000004](write) hdb5's sb offset: 798208 md: recovery thread got woken up ... md0: no spare disk to reconstruct array! -- continuing in degraded mode md: recovery thread finished ... (skipping faulty hda5 ) . raid1: md0: redirecting sector 750757 to another mirror Since this failure (a few days) it runs perfectly without reboot. Marvellous! Egon