Re: LVM on NetBSD/i386 v6.1.4

[Ib-Michael Martinsen <i.m.martinsen%gmail.com@localhost>]

Michael van Elst writes:

 > > Michael van Elst writes:

 > The only way to find out about the issue is to scan the system logs,
 > you cannot distinguish between a broken mirror and a volume that hasn't
 > been mirrored in the first place.
 > 
 > Fixing the mirror is obviously simply a lvconvert command, but LVM
 > doesn't know the old configuration, you have to specify again, what
 > disks are to be used how for the mirror.
 > Also, since that's basically setting up a mirror from scratch, it
 > needs to copy the whole volume and not just the information on
 > the lost disk (think about volumes that span multiple disks).

Aah, now I see! I was only thinking about mirroring disks (pairing 2
disks), but rebuilding volumes with 4 or more disks would require more
work (from the computer, not me :-).

 > > Are you saying that you can encounter data inconsistency on the healthy
 > > disk in a Linux LVM, if a disk in a mirrored LVM volume breaks down?
 > 
 > No. That would make LVM completely useless.

Yes, indeed.

 > > (I have never experienced that with the AIX LVM, but of curse it is
 > > another LVM).
 > 
 > AIX is completely different and much easier to use (you can even
 > move and resize busy filesystems), but then, who would want to
 > run AIX?  :)

As long as it is some sort of Unix, I can live with it :-)

Kind regards
  Ib-Michael
-- 
Email: i.m.martinsen(at)gmail.com
Running NetBSD/i386 v6.0

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