Re: [linux-lvm] Strange behavior adding LUN

[Stuart Browne <stuart browne ausregistry com au>]

Huh, nice to know I missed such an obvious step.

Cheers ;)

Stuart

> -----Original Message-----
> From: linux-lvm-bounces redhat com [mailto:linux-lvm-bounces redhat com]
> On Behalf Of Ray Morris
> Sent: Tuesday, 21 February 2012 7:41 AM
> To: linux-lvm redhat com
> Subject: Re: [linux-lvm] Strange behavior adding LUN
> 
> > So, weird.  Why is the 'pvcreate' seeing the new LUN, seeing that it
> > is 2.93TB, but not creating any PE's for use.
> 
> You need to vgextend. The PE size is a property of the VG, so until
> it's added to a VG there's no way of knowing how big the PEs are and
> therefore how many will fit on the PV.
> --
> Ray Morris
> support bettercgi com
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> 
> 
> On Mon, 20 Feb 2012 10:26:05 +1100
> Stuart Browne <stuart browne ausregistry com au> wrote:
> 
> > Hi,
> >
> > We've been cleaning up some of our storage recently and migrating to
> > new disks etc. when I came across this issue.
> >
> > I've re-allocated some old storage back to a server as a new array,
> > but lvm is refusing to allow the LUN to participate.  Here's what I
> > see:
> >
> > [root office ~]# pvcreate /dev/mpath/backup1
> >   Physical volume "/dev/mpath/backup1" successfully created
> > [root office ~]# pvdisplay /dev/mpath/backup1
> >   "/dev/mpath/backup1" is a new physical volume of "2.93 TB"
> >   --- NEW Physical volume ---
> >   PV Name               /dev/mpath/backup1
> >   VG Name
> >   PV Size               2.93 TB
> >   Allocatable           NO
> >   PE Size (KByte)       0
> >   Total PE              0
> >   Free PE               0
> >   Allocated PE          0
> >   PV UUID               ipTgcI-kjdJ-Aucx-cUVs-TWKr-wAFO-Rkd0u8
> >
<snip>
> >
> > Given that it looks, well, 'ok' to me, I thought I'd 'pvremove' it
> > and validate that the disk is empty.  It was (^@'s all the way, for
> > the first 10MB at least), and re-add it.  New UUID, but basically the
> > same.
> >
> > So, weird.  Why is the 'pvcreate' seeing the new LUN, seeing that it
> > is 2.93TB, but not creating any PE's for use.
> >
> > Anybody have any idea what I should try next?
> >
> > Stuart J. Browne
> > Senior Unix Administrator, Network Administrator, Database
> 
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