Tino Schwarze wrote:
>
> But I also had an SW RAID with some mysterious missing member.
> Supposedly, I did something wrong, but after all, I couldn't use mdadm
> for monitoring any more because it always complained although there was
> no problem.
A missing member doesn't bother raid1 at all.
>> I start with the premise that I want to be able to restore from a
>> mirrored copy of my backuppc archive. It hasn't actually been necessary
>> but I still consider it a big plus that in a disaster recovery scenario
>> I can plug this copy into a laptop and restore files instantly.
>
> That's one of the issues still bugging me - I'd like to have a live copy
> of the whole pool. RAID doesn't protect from filesystem corruption and a
> lot of related accidents.
The way I do it is to create a raid1 with 3 members, one specified as
'missing'. Then once a week I put in a disk and 'mdadm --add ...' the
partition to the array. When it finished mirroring (a little over 2
hours for a 750 gig SATA), I momentarily stop backuppc and unmount the
array so the filesystem is clean, then fail and remove the partition and
rotate that disk offsite. That way I always have a pair of mirrored
disks locally and one or two slightly out of data offsite.
--
Les Mikesell
[EMAIL PROTECTED]
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