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- From: "David Kuntz" <davkntz@gmail.com>
- To: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org>
- Subject: Re: [PLUG] LVM Question
- Date: Mon, 19 Nov 2007 08:39:26 -0500
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- Reply-to: Philadelphia Linux User's Group Discussion List <plug@lists.phillylinux.org>
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LVM writes header information with volume group/logical volume info
onto each physical disk. Among other things this makes it difficult
to accidentally overwrite a disk in use by another VG with pvcreate
or, in this case, prevents catastrophe when /dev/sd? gets shuffled due
to a reconfiguration of the storage devices.
LVM should read this information and activate the correct devices for
each Volume Group at the next boot.
David
On Nov 19, 2007 8:20 AM, James Barrett <jadoba@jadoba.net> wrote:
> On Mon, Nov 19, 2007 at 08:00:11AM -0500, Neill R wrote:
> > I am concerned that when i reboot the machine my lvm volume groups
> > will get all out of whack since the /dev/sd? devices will be shuffeled
> > around. Is this a real issue or is LVM have a mechanism to handle a
> > situation like this.
>
> If I am not mistaken, LVM identifies physical disks by their UUID, so
> shuffling block devices should really not be an issue. If I am wrong,
> someone probably will correct me, so dont try it if someone does :)
>
> -- James
>
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___________________________________________________________________________
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