[linux-lvm] using a read-only PV
Heinz J . Mauelshagen
mauelshagen at sistina.com
Fri Feb 22 05:52:02 UTC 2002
On Fri, Feb 22, 2002 at 11:26:51AM +0100, Eduard Bloch wrote:
> Hello,
>
> is it possible to use a physical volume in read-only mode?
"hdparm -r 1 PhysicalVolumePath" would set the device used as a PV to
read-only mode (if supported), but that wouldn't allow LVM to work properly
because it needs to write to *all* PVs on updates.
> The idea is:
> put a snapshot of the PV on a CDROM. Later, build a volume group, with
> this read-only volume as the first volume in the snapshot mode, and an
> additional volume on the harddisk where the differences are stored.
>
> Is a such scenario possible - or already useable?
No.
LVM needs to be enhanced to support what you want.
>
> Gruss/Regards,
> Eduard.
> --
> The UNIX Guru's view of Sex:
> unzip ; strip ; touch ; finger ; mount ; fsck ; more ; yes ; umount ;
> sleep [Hauke Heidtmann in dcoud]
>
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--
Regards,
Heinz -- The LVM Guy --
*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***
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Heinz Mauelshagen Sistina Software Inc.
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Mauelshagen at Sistina.com +49 2626 141200
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