Re: [linux-lvm] replacing a failling disk on a mirrred VG.

[Steve Wray <steve myself gen nz>]

Jonathan E Brassow wrote:
> This one should be pretty easy...
>
> Effectively, you want to keep the primary mirror devices, so do:
> lvconvert -m0 <vg/lv>
> to down convert them to linear devices.
>
> Then remove PV1 (vgreduce), add a new disk to your system, add it to 
> your vg (vgextend), and finally, up-convert the linear devices to 
> mirrors again:
> lvconvert -m1 <vg/lv>

So you can't just add a new disk and use pvmove to move extents off of 
the failing disk?


> On Feb 4, 2007, at 12:53 PM, Georges Giralt wrote:
>
> > Hi !
> > I run A Fedora Core 6 box with
> > lvm> version
> >   LVM version:     2.02.17 (2006-12-14)
> >   Library version: 1.02.13 (2006-11-28)
> >   Driver version:  4.10.0
> > lvm>
> > on a 2.6.19 kernel.
> > My VG comprises 3PV  onto which I've spread 4 mirrored LVs.
> > PV 0 : LV1 mirror copy 0, LV2 mirror copy 0, lv3 mirror copy 0 and lv4 
> > mirror copy 0
> > PV 1 : LV1 mirror copy 1, LV2 mirror log, LV3 mirror log and LV4 
> > mirror copy 1
> > PV2 : LV1 mirror log, LV2 mirror copy 1 , LV3 mirror copy 1 and LV4 
> > mirror log.
> > I plan to replace (Smart signals a future failure) the PV #1.
> > Question : What is the best route to do this ? And is it feasible ?
> > Thanks a lot in advance for your answer !