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Re: [linux-lvm] Removing vg and lv after physical drive has been removed


dmsetup status does indeed show the orphan LV's vg04-vz and vg04-swap as active.

There seems to be two ways to clear them, dmsetup clear and dmsetup
remove - which one is the best to use? Anything I should be
particularly careful about to not mess up things?

Neither partition are active in Linux, both were unmounted before
removing the drive.

On Sun, Sep 2, 2012 at 1:01 AM, Keith Keller
<kkeller wombat san-francisco ca us> wrote:
> On 2012-09-01, Rene C. <openvz dokbua com> wrote:
>> We had a disk fail in a server and replaced it before removing the
>> drive from LVM.
>> The server has 4 physical drives (PV's), each with it's own volume
>> group (VG). Each VG has 2 or more logical volumes (LV's.) Now LVM is
>> complaining about the missing drive. So we have a VG (vg04) with two
>> LV's that have become orphans than we need to clear out of the system.
>> The problem is every time we run any LVM command we get some 'read
>> failed' errors. I've tried different commands to try to clear it out
>> but so far without luck:
> [snip]
>> The missing VG and LV's are not important, we just want to remove them.
> I believe that you can use dmsetup to remove the vestiges of old unused
> LVs and VGs.  Of course you *must* be careful that you don't
> fumblefingers the command.  ;-)  I don't recall the exact syntax, so
> check out man dmsetup, and if you have questions, hope that someone with
> more experience can reply.  (I did this safely many months ago, but I do
> not recall the exact syntax I used.)
> --keith
> --
> kkeller wombat san-francisco ca us
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

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