Re: How to auto rebuild array?

[Rui Santos <rsantos@ruisantos.com>]

Hi Bart,

    Nevertheless, i could realy use those commands outputs.

Rui


bart@ardistech.com wrote:

>Hi Rui,
>
>  
>
>>    Is that a RAID1 ou RAID5?
>>
>>    
>>
>It's a RAID5, but the problem also happends on RAID1.
>
>  
>
>>    Can you give the output of these commands?
>>
>>    mdadm --misc -D /dev/md3
>>    mdadm --misc -E /dev/hda4
>>    mdadm --misc -E /dev/hdb4
>>    mdadm --misc -E /dev/hde4
>>    mdadm --misc -E /dev/hdf4
>>
>>    One other thing. Are you sure that all you raid partitions are
>>marked 0xfd ?
>>
>>    
>>
>There are 0xfd partitions with persistent superblock.
>
>  
>
>>    Also attach you mdadm.conf/raidconf file, if you have any...
>>
>>    
>>
>I don't use a /etc/mdadm/mdadm.conf file, the raid is started during kernel
>boot with raid autodetect. That's when the 'kicking non-fresh drive' print
>occurs. When this happened 'mdadm --detail' will not display the kicked disk
>in the list of array disks anymore, also the mdadm deamon only will get the
>name of the array that's degraded, not the name of the kicked device :(
>
>I made a script that runs after reboot as fix, it will hott-add the kicked
>disks back to the array. It seems to fix the problem.
>
>Regards,
>		Bart
>
>
>-----------------------------------------------------
>#! /bin/bash
>
>DEVLIST=`ls /dev/hd??`
>for dev in $DEVLIST; do
>	 result=`mdadm --query $dev | grep mismatch`
>	 if [ -n "$result" ]; then
>		raid=/dev/`echo $result | awk 'BEGIN {FS="[ .]"} {print $9}'`
>		echo $raid needs $dev added
>		mdadm --add $raid $dev
>	 fi
>done
>-----------------------------------------------------
>
>
>
>
>  
>
>>>I have the problem that after a power failure I get the message:
>>>
>>>Jul 12 15:29:17 kernel: md: created md3
>>>Jul 12 15:29:17 kernel: md: bind<hda4>
>>>Jul 12 15:29:17 kernel: md: bind<hdb4>
>>>Jul 12 15:29:17 kernel: md: bind<hde4>
>>>Jul 12 15:29:17 kernel: md: bind<hdf4>
>>>Jul 12 15:29:17 kernel: md: running: <hdf4><hde4><hdb4><hda4>
>>>Jul 12 15:29:17 kernel: md: kicking non-fresh hde4 from array!
>>>Jul 12 15:29:17 kernel: md: unbind<hde4>
>>>
>>>I understand that hde4 is not 'fresh' and the array need to be rebuild
>>>but I only can do that with 'mdadm --add /dev/md3 /dev/hde4'. I would
>>>like to have it turned into a hot-spare, in which case a rebuild would
>>>start automatic.
>>>
>>>This application runs unattended, so there is nobody there to enter
>>>mdadm commands.... How can I make the rebuild starting automatic
>>>(like a hardware raidcard does)?
>>>
>>>      
>>>
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>  
>