On Sat, 11 Oct 2014, lee wrote: > Well, who can afford that? Someone who can doesn't need to swap > drives.
I've upgraded the drive capacity in machines on multiple occasions because drives have gotten cheaper... but we don't have enough funding to afford replacing the computers at the same time. > How do I merge VGs that have different extent sizes? Change the extent size using vgchange, and then vgmerge them. > The snapshots are to back up guests in vg_guests. They must go into the > free space available in vg_mydata. Other than that, there's a 16GB swap > partition (/dev/sda2) currently used by one of the guests. > > Both sda and sdb are logical RAID volumes. Dom0 is on /dev/sda1. > > As you can see, it's a very straightforward and logical set up, except > for the swap partition which is way too large for dom0 and thus has been > re-assigned to a guest that actually requires it. The only problem is > LVM which doesn't let me make snapshots. OK. This sounds like you can just disable the swap on /dev/sda2 (swapoff), pvcreate /dev/sda2; vgextend /dev/mapper/vg_guests /dev/sda2; Do your snapshots, and whatever else you need, then you can vgreduce /dev/mapper/vg_guests /dev/sda2; and reset your swap if you need to. Alternatively, you can make the physical extents the same (probably using vgchange on vg_mydata to make the size 16M), inactivate all of the volumes of vg_guests, vgmerge it, and then make snapshots. > > Volume groups don't reside on partitions or devices. They encompass > > physical volumes which do. > > Physical volumes do not reside on partitions or devices. They provide > them. This is incorrect. A physical volume (LVM) sits on top of a block device, which is usually a partition (or an entire disk). -- Don Armstrong http://www.donarmstrong.com "The trouble with you, Ibid" he said, "is that you think you're the biggest bloody authority on everything" -- Terry Pratchet _Pyramids_ p146 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20141011024213.gm23...@teltox.donarmstrong.com
