Hi, here is what /proc/mdstat gives to me after a crash of the server. 2 drives (one on md1 and one on md4 have de (F). This means they are faulty. Should I do : mdadm /dev/md1 -a /dev/ide/host2/bus0/target0/lun0/part5 mdadm /dev/md4 -a /dev/ide/host2/bus0/target0/lun0/part7 or is there an other way to solve the problem ? Concerning md5 (raid 5), 3 drives are used. I assume the one marked [3] is not used. What can it be used for ? Best regards Eric >Personalities : [raid0] [raid1] [raid5] >read_ahead 1024 sectors >md0 : active raid1 ide/host2/bus1/target0/lun0/part1[1] ide/host2/bus0/target0/lun0/part1[0] > 15936 blocks [2/2] [UU] > >md1 : active raid1 ide/host2/bus1/target0/lun0/part5[1] ide/host2/bus0/target0/lun0/part5[0](F) > 851328 blocks [2/1] [_U] > >md3 : active raid0 ide/host2/bus1/target0/lun0/part6[1] ide/host2/bus0/target0/lun0/part6[0] > 802944 blocks 64k chunks > >md4 : active raid1 ide/host2/bus1/target0/lun0/part7[1] ide/host2/bus0/target0/lun0/part7[0](F) > 1686720 blocks [2/1] [_U] > >md2 : active raid1 ide/host2/bus1/target1/lun0/part1[1] ide/host2/bus0/target1/lun0/part1[0] > 2554176 blocks [2/2] [UU] > >md5 : active raid5 ide/host2/bus1/target1/lun0/part6[2] ide/host2/bus1/target0/lun0/part8[1] ide/host2/bus0/target1/lun0/part6[3] ide/host2/bus0/target0/lun0/part8[0] > 228524416 blocks level 5, 64k chunk, algorithm 0 [3/3] [UUU] > >unused devices: <none> > > - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html