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From: Danilo Godec <danilo.godec@agenda.si>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: [linux-lvm] Duplicate PV's - how does LVM choose which one to use
Date: Tue, 21 Feb 2012 09:40:43 +0100	[thread overview]
Message-ID: <4F43588B.8040202@agenda.si> (raw)

Hi,

I had VG's and LV's on top of a Linux MD RAID1 array using two iSCSI 
volumes. Apparently this RAID1 array wasn't started properly after a 
reboot, so LVM detected two duplcate PV's (both RAID1 members had the 
same PV UUID) and chose to use one of them. Unfortunately I didn't 
notice it so it ran like that for a while.

I was lucky and the machine was only rebooted once, so LVM used the same 
PV all the time, but what would happen on a next reboot?

How does LVM decide which one to use?  Will it always choose the same one?


    Thanks, Danilo

             reply	other threads:[~2012-02-21  8:40 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-21  8:40 Danilo Godec [this message]
2012-02-21 12:09 ` [linux-lvm] Duplicate PV's - how does LVM choose which one to use Alasdair G Kergon
2012-02-21 16:35   ` Ray Morris
2012-02-21 16:43     ` Alasdair G Kergon
2012-02-21 16:49       ` Stuart D Gathman
2012-02-21 17:07         ` Alasdair G Kergon

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