topic Re: pvmove command question in Operating System - HP-UX

pvmove command question

Error_1 — Wed, 17 Oct 2001 20:30:56 GMT

does the source and destination have to be same size

does the source and destination have to be in the same vg?

can the dest. be associated with an excisitng vg?

does it use rdsk or dsk?

Re: pvmove command question

James R. Ferguson — Wed, 17 Oct 2001 21:32:27 GMT

Hi:

'pvmove" requires that extents be moved *within the same* volume group.

The source and destination volumes (pv_paths) can be the same or can differ. In fact, in a multi-disk volume, if the destination is not specified, then *all* disks (except the source disk) are candidates as receipients of the moved extents.

Have a look at the man pages for 'pvmove' for more information.

Regards!

...JRF...

Re: pvmove command question

Michael Tully — Wed, 17 Oct 2001 21:33:44 GMT

Hi,

No, it is all dependant on size, and the
tyep of logical volumes being move that
are on this disk. This takes into
consideration the logical volume structure,
especially if it is strict, contiguous etc.

Yes the disks have to be in the same volume
group. Once a disk is committed to a group
it is not possible to move the disk and
it's logical volumes. It is only uses 'dsk'

Have a look at the man page for 'pvmove' for
a full explanation.

HTH
-Michael

Re: pvmove command question

Santosh Nair_1 — Wed, 17 Oct 2001 23:46:57 GMT

The source and destination disks do not have to be the same size, but the destination disk should have enough free extents to accomodate the move.

The pvmove command only works with disks in the same VG and obviously the VG must exist for the command to work. It uses the block device, i.e. the /dev/dsk devices.

-Santosh