Re: How to remove a PV from an LVM VG?
On Sun, May 06, 2012 at 08:04:35PM -0700, Marc Shapiro wrote:
> I think that my old disk is dying and I want to get the data off of
> it before that happens. I just had the system drop out of X-windows
> and lock up completely.
>
[...]
> The old drive is /dev/sda and there are two PVs on the disk
> /dev/sda3 and /dev/sda4, both are in vg1
>
> The new drive is /dev/sdc and it has only 1 LVM PV and that is /dev/sdc4
>
[...]
>
> Is this the correct method to preserve my data:
>
> pvmove /dev/sda3 /dev/sdc4
>
> wait for it to finish
>
> pvmove /dev/sda4 /dev/sdc4
>
> once that has finished
>
> vgreduce vg1 /dev/sda3
> vgreduce vg1 /dev/sda4
>
> pvremove /dev/sda3
> pvremove /dev/sda4
>
>
> I really need to know that this is the correct procedure and get
> this done as quickly as possible. I don't want to lose data.
>
This is the method I use.
pvmove fails sometimes, you just need to restart it and it will continue
where it stopped.
Philippe
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