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Re: Borked MD RAID...



If you only have 3 disks, then you can't have:
spares=1



On Sun, Nov 30, 2008 at 3:11 PM, Eitan Tsur <eitan tsur gmail com> wrote:
>>
>># mdadm.conf written out by anaconda
>>DEVICE partitions
>>MAILADDR root localhost
>>
>>ARRAY /dev/md0 level=raid5 num-devices=3 spares=1
>> UUID=0c21bf19:83747f05:70a4872d:90643876
>
> If I switch the "DEVICE partitions" with "DEVICE /dev/sdb1 /dev/sdc1
> /dev/sdd1", drives no longer are allocated as spares, however the array
> still seems to rebuild every boot.
>
> I don't remember the specifics of what was in /proc/mdstat at the time, but
> currently the array is being rebuilt.  I'll reboot after it is complete to
> give you a copy of it.  Basically it allocated the dropped drive as a spare
> which I'd have to mdadm -stop and mdadm -add to the original array after
> every boot, manually.  Give me an hour or two and I'll get you the output of
> mdstat.
>
> On Sun, Nov 30, 2008 at 2:41 PM, Lonni J Friedman <netllama gmail com>
> wrote:
>>
>> On Sun, Nov 30, 2008 at 2:38 PM, Eitan Tsur <eitan tsur gmail com> wrote:
>> > I just recently installed a 3-disk RAID5 array in a server of mine,
>> > running
>> > FC9. Upon reboot, one of the drives drops out, and is allocated as a
>> > spare.
>> > I suspect there is some sort of issue where DBUS re-arranges the
>> > drive-to-device maps between boots, but I am not sure... Just kind of
>> > annoying to have to stop and re-add a drive every boot, and wait the
>> > couple
>> > hours for the array to rebuild the 3rd disk. Any thoughts? Anyone else
>> > encountered such an issue before? What should I be looking for? I'm new
>> > to
>> > the world of RAID, so any information you can give may be helpful.
>>
>> What's in /etc/mdadm.conf, /proc/mdstat and dmesg when this fails ?
>>


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                                    netllama gmail com
LlamaLand                       https://netllama.linux-sxs.org


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