Re: spare group

[Tomka Gergely <tomka@avaxio.net>]

Neil Brown írta:
> On Monday June 11, tomka@avaxio.net wrote:
>> ARRAY /dev/md1 level=raid5 devices=/dev/sd[defg]1 num-devices=3 
>> spares=1 spare-group=ubul name=ursula:T2 
>> UUID=fb8ece28:9a6a31f8:700f37f6:7ee91bcf
>> ARRAY /dev/md0 level=raid5 devices=/dev/sd[abc]1 num-devices=3 
>> spare-group=ubul name=ursula:T1 UUID=3e420024:281f9bb1:fd9ef39b:c18153b1
> 
> You don't want the "devices=" entries in there.  If you leave them
> there, and sdg1 does get moved to md0, then on the next restart, md0
> won't get assembled properly.

Thanks.

>> According to the source:
>>
>> * If an array has active < raid && spare == 0 && spare_group !=NULL
>> * Look for another array with spare > 0 and active == raid and same 
>> spare_group
>> * if found, choose a device and hotremove/hotadd
>>
>> This is not happening. What is my mistake?
> 
> Is "mdadm --monitor" running?  That is required to perform
> spare-migration.

Yes, of course.

tg
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