On Thu, Mar 16, 2006 at 04:08:12PM +0100, fredrik.backman@nll.se wrote: > Im doing a snapshot (hardware-based in EVA5000) of a LV (lvm2) and i > wonder what is the correct way to use this snapshot? Problem is that > this snapshot has the same ID as the original one. In HP-UX a would do a > vgchgid on this snapshot-LV. Any help would be aprreciated. Firstly your snapshot will be at the PV level not the LV level. You must take a hardware snapshot of a complete VG i.e. every PV within that VG. [If that's too much data, use pvmove and vgsplit first.] Current lvm tools can't handle two cloned VGs on the same machine, so you have to hide the old one before you can manipulate the new one. Make a temporary copy of /etc/lvm/ somewhere. Edit lvm.conf there so it filters out everything except your cloned PVs. Set the environment variable LVM_SYSTEM_DIR to point to your temporary copy of /etc/lvm. Run pvchange --uuid on each of the new PVs. Run vgchange --uuid on the VG. Run vgrename to give it a unique name. Then remove the LVM_SYSTEM_DIR environment variable and run vgscan and you should be able to use both old and new VGs. [I'm hoping to enhance the tools to simplify this process late next month.] Alasdair -- agk@redhat.com _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
