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

[Rene C.]

I forgot to mention 'open count' is 0 for both LV's.

On Sun, Sep 2, 2012 at 9:02 AM, Rene C. <openvz at dokbua.com> wrote:
> Thanks.
>
> 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 at wombat.san-francisco.ca.us> wrote:
>> On 2012-09-01, Rene C. <openvz at 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 at wombat.san-francisco.ca.us
>>
>>
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