On Sunday July 23, pwaldo@xxxxxxxxxxxxx wrote:
> Please, please! I am dead in the water!
>
> To recap, I have a RAID6 array on a Fedora Core 5 system, using /dev/hd[acdeg]
> 2 and /dev/sd[ab]2. /dev/hdd went bad so I replaced the drive and tried to
> add it back to the array. Here is what happens:
>
> #mdadm --assemble /dev/md1 /dev/hd[acdeg]2 /dev/sd[ab]2
> mdadm: no RAID superblock on /dev/hdd2
> mdadm: /dev/hdd2 has no superblock - assembly aborted
>
> I also tried assembling without the new drive:
> #mdadm --assemble /dev/md1 /dev/hd[aceg]2 /dev/sd[ab]2
> mdadm: failed to RUN_ARRAY /dev/md1: Input/output error
>
> Forgive me if the messages are not exactly correct, as I am booted into the FC
> rescue disk and I am transcribing what I see to another computer.
>
> How can I get mdadm to use the new drive? Am I completely fscked? Thanks in
> advance for any help!!!!
Sorry for not following through on this earlier.
I think I know what the problem is.
From the "-E" output you have me :
Device Size : 155308288 (148.11 GiB 159.04 GB)
From the fdisk output in the original email:
[root@paul ~]# fdisk -l /dev/hdd
Disk /dev/hdd: 160.0 GB, 160029999616 bytes
255 heads, 63 sectors/track, 19455 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdd1 1 122 979933+ fd Linux raid autodetect
/dev/hdd2 123 19455 155292322+ fd Linux raid autodetect
Notice that hdd2 is 155292322, but the device needs to be
155308288. It isn't quite big enough.
mdadm should pick this up, but obviously doesn't, and the error message
isn't at all helpful.
I will fix that in the next release.
For now, repartition your drive so that hdd2 is slightly larger.
NeilBrown
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