On 21 April 2013 17:16, Evgeny Koryanov <evgeny.koryanov@xxxxxxxx> wrote: > Hello everybody! > > Yesterday I met a problem with one of raid5 arrays build by mdadm on three > (sd[bcd]) 1.5T devices. > I found array in degraded state with sdd fail. Drive becomes fail state > after power jump. > Server supplied by UPS but this seems was not good enough - server was not > rebooted but one drive as I said becomes fail state. > I simply reattaches it and array started rebuilding but fails after couple > of %'s passed with sdc becomes fail!!! > I assemble array again with sd[bc] and tried to attach sdd again: picture > repeated rebuild fails. > So I have sdb in sync state, sdc - failed and sdd spare. I checked SMARTs of > drives to understand reason of such behavior and > found it clean on all devices. Than I tried to dd if=/dev/sd[bcd] > of=/dev/null and found that dd also fails with IO error. > After dd bad blocks started appears in SMART :) > Finally I have: > sdb - sync > sdc - fail > sdd - spare > states and a number of bads on each hdd in random places... > > Could any one suggest how can I assemble this array now in read-only mode to > try to copy data?! > Theoretically data on sdd should not be rewritten and it still should be > possible to try recover data (meaning that bads appears in quite different > places)... > May be you know utility which helps recover data or the way how to start > array in read-only mode preventing becomes it to degraded state > and force md device to try recover data using readable places from each > devise??? > Or any other ideas appreciated! Thanks, any way... > > Best regards, > Evgeny. > -- > 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 Hi, Could you post the smartctl -a output of all the drives? If 2 drives are failling you might want to derescue them somewhere and assemble the RAID from that. Mathias -- 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
