Re: mdadm problem

[David Greaves <david@dgreaves.com>]

Jean-Yves Mertès wrote:

> Hello!
>
> I do not know if I may receive any support about mdadm through this 
> e-mail address. If not, please, could you forward this message to the 
> appropriate box if one exists.
>
> I am currently trying to migrate a Linux partition (Mandrake 10) to 
> RAID 1. To this purpose I have installed mdadm V1.8.1.

This is an experimental version:

This is a "development" release of mdadm.  It should *not* be
considered stable and should be used primarily for testing.
The current "stable" version is 1.8.0.


> The first attempt was to configure an equally-sized partition of my 
> second disk (/dev/hdb) as part of a degraded RAID 1 device. 
> Unfortunately, starting the array fails. The following shows pieces of 
> information that should help  understanding the case:
>
> The command I use is:
> mdadm -C /dev/md0 --metadata=1 --level=raid1 --raid-devices=2 missing 
> /dev/hdb5 -v
>
> To which mdadm answers:
> mdadm: /dev/hdb5 appears to contain an ext2fs file system
>    size=4843912K  mtime=Thu Dec  2 17:11:54 2004
> mdadm: /dev/hdb5 appears to be part of a raid array:
>    level=1 devices=2 ctime=Sat Dec  4 18:28:46 2004
> mdadm: size set to 4843904K
> Continue creating array? y
> VERS = 9000
> mdadm: ADD_NEW_DISK for /dev/hdb5 failed: Invalid argument

_possibly_ because

Version 1 superblocks requires 2.6.10 or a recent 2.6.10-rc snapshot


Try agin with 1.8.0 and if you have probs then yell :)

HTH
David
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