Hey Wol
> My plan now would be to run mdadm --assemble --force /dev/md3 with 3
> disk, to get the Raid going in a degraded state.
>Yup, this would almost certainly work. I would recommend overlays and
>running a fsck just to check it's all okay before actually doing it on
>the actual disks. The event counts say to me that you'll probably lose
>little to nothing.
So as I was trying to reassemble my Raid it crashed again. But this time
sdc vanished.
I get the following output:
[root@dirvish ~]# mdadm --stop /dev/md3
mdadm: stopped /dev/md3
[root@dirvish ~]# mdadm --assemble --force /dev/md3 /dev/sdc1 /dev/sdd1
/dev/sdf 1
mdadm: forcing event count in /dev/sdc1(2) from 5995154 upto 5995162
mdadm: clearing FAULTY flag for device 0 in /dev/md3 for /dev/sdc1
mdadm: failed to add /dev/sdc1 to /dev/md3: Invalid argument
mdadm: /dev/md3 assembled from 2 drives - not enough to start the array.
and when I checked with fdisk sdc wasn't there anymore.
[root@dirvish ~]# fdisk -l
Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 fd Linux raid
autodetect
/dev/sda2 14 535 4192965 fd Linux raid
autodetect
/dev/sda3 536 30401 239898645 fd Linux raid
autodetect
Disk /dev/sdb: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 13 104391 fd Linux raid
autodetect
/dev/sdb2 14 535 4192965 fd Linux raid
autodetect
/dev/sdb3 536 30401 239898645 fd Linux raid
autodetect
Disk /dev/sdd: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdd1 * 1 243201 1953512001 fd Linux raid
autodetect
Disk /dev/sde: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sde1 * 1 243201 1953512001 fd Linux raid
autodetect
Disk /dev/sdf: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdf1 1 243201 1953512001 83 Linux
...
After a reboot of the system sdc was back again but vanished again after
I retried the assembly.
Would the assembly also work with my 4th HDD, sde1 although in the mdadm
--eaxmine it is labeld as spare?
Greetings
Christian
