Re: Change disk problem

[David Greaves <david@dgreaves.com>]

Jon Lurås wrote:
> Hello 
> 
> Thank you for your input.
> 
> I gave to little information in the original mail. I had tried to 'add'
> the new disk. It shows up like this - se below. The bad thing is that then
> the device '/dev/hdj1' suddenly changes to 'spare'...
> and everything looks very bad :-(

OK, you also wrote (forgot to cc the list)
Jon Lurås wrote:
> Hi again
>
> A little more information:
> The only solution I found to the problem which arised after the 'add' og
> /dev/hdk1 is
> "mdadm --create /dev/md0 --verbose --level=5 --chunk=64 --raid-devices=3
> /dev/hdi1 /dev/hdj1 missing"
>
> The it looks like the original 'mdadm --detail /dev/md0' result.
>
> Jon

So I'm now quite confused.

Can you tell us what you did a step at a time.
This is what should have happened:

1 Original disk failed.
2 md0 went into degraded and mdadm --monitor sent you an email
3 you shutdown and replaced /dev/hdk (?)
4 you partitioned /dev/hdk to make hdk1
5 you used --add to add hdk1 to the array
6 all was well

now you seem to have done several 'interesting' things in addition (like issuing
a --create).
However, if you can go back to the original --detail given, a simple --add
should resolve your problems...

You may want to check your dmesg to make sure you don't have a hardware issue.

> demeter:/etc# mdadm --detail /dev/md0
> /dev/md0:
>         Version : 00.90.00
>   Creation Time : Sat Jun  7 22:04:01 2008
>      Raid Level : raid5
>      Array Size : 490223232 (467.51 GiB 501.99 GB)
>     Device Size : 245111616 (233.76 GiB 250.99 GB)
>    Raid Devices : 3
>   Total Devices : 4
> Preferred Minor : 0
>     Persistence : Superblock is persistent
> 
>     Update Time : Sun Jun  8 12:05:02 2008
>           State : active, degraded
>  Active Devices : 1
> Working Devices : 3
>  Failed Devices : 1
>   Spare Devices : 2
> 
>          Layout : left-symmetric
>      Chunk Size : 64K
> 
>            UUID : 7edd5dfe:14b3ffb2:304b0607:0d821dcd
>          Events : 0.8
> 
>     Number   Major   Minor   RaidDevice State
>        0      56        1        0      active sync   /dev/hdi1
>        1       0        0        1      removed
>        2       0        0        2      removed
> 
>        3      57        1        3      spare   /dev/hdk1
>        4      56       65        4      spare   /dev/hdj1

This doesn't look good.

what does --examine say about each of the components?

David
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