----- Digimer <linux@alteeve.com> wrote: > On 11/01/2011 03:13 PM, Dan White wrote: > > ----- Digimer <linux@alteeve.com> wrote: > >> On 11/01/2011 02:39 PM, Dan White wrote: > >>> Is a logical volume group necessary before one can start making mountable partitions ? > >>> > >>> I'm trying to work with a SAN. We were allocated a 10Gb LUN to "play" with. Another admin created a logical volume on the LUN and then made a single partition out of the logical volume. The flow I am familiar with from Red Hat's GUI is to first make a logical volume group, then make partitions in the group that I can adjust in size as necessary. > >>> > >>> Are both workflows valid ? > >> > >> LVs must be created from VGs. > >> > > > > I agree. Got a documentation reference I can use for backup ? > > man lvcreate? Not being flippant, but the 'VolumeGroupName' is a > required value. :) > > Also from the man page; > > DESCRIPTION > lvcreate creates a new logical volume in a volume group ( see vgcre- > ate(8), vgchange(8) ) by allocating logical extents from the free phys- > ical extent pool of that volume group. If there are not enough free > physical extents then the volume group can be extended ( see vgex- > tend(8) ) with other physical volumes or by reducing existing logical > volumes of this volume group in size ( see lvreduce(8) ). If you spec- > ify one or more PhysicalVolumes, allocation of physical extents will be > restricted to these volumes. > The second form supports the creation of snapshot logical volumes which > keep the contents of the original logical volume for backup purposes. > Many thanks. Not at all flippant. Direct and informative. “Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.” Bill Waterson (Calvin & Hobbes) _______________________________________________ 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/
