On Mon, 2006-11-20 at 19:37 -0800, Sean Bruno wrote: > > And finally(if responding to my own post wasn't annoying enough!), if I > rebuild md0 and md1(skipping md2 for now), then reboot the machine, the > machine comes backup with all three devices as failed! > > I start the rebuild on /dev/md0 and /dev/md1 thusly: > > [root@home-desk ~]# mdadm --manage --add /dev/md0 /dev/sdb1 > mdadm: re-added /dev/sdb1 > [root@home-desk ~]# mdadm --manage --add /dev/md1 /dev/sdb2 > mdadm: re-added /dev/sdb2 > > Before reboot(cat /proc/mdstat): > [root@home-desk ~]# cat /proc/mdstat > Personalities : [raid1] > md0 : active raid1 sdb1[0] sda1[1] > 1052160 blocks [2/2] [UU] > > md1 : active raid1 sdb2[0] sda2[1] > 4192896 blocks [2/2] [UU] > > md2 : active raid1 sda3[1] > 151043008 blocks [2/1] [_U] > > All is well with md0 and md1 for now. I will work on recovering md2 > later. But if I reboot, sdb1 and sdb2 disappear from my raid > configuration, as if I hadn't added them somewhere? > > Personalities : [raid1] > md0 : active raid1 sda1[1] > 1052160 blocks [2/1] [_U] > > md1 : active raid1 sda2[1] > 4192896 blocks [2/1] [_U] > > md2 : active raid1 sda3[1] > 151043008 blocks [2/1] [_U] > > unused devices: <none> > > > Any ideas on how to make this 're-add' stick? > > Sean > Locate the kernel log and check for MD errors. I would guess that one of your drives is slowly dieing. - Gilboa
