On Mon, 30 May 2011, Itay wrote:
I'd like to set up a USB drive using LVM. Could someone knowledgable confirm
that the following recipe should allow me to hot-plug the USB drive without
rendering the LVM file-systems inaccessible?
The recipe has a problem in the vgcreate step (below,
marked with '***********').
The physical volume is not listed in /dev/disk/by-uuid/...
Can someone suggest how to fix the recipe, or suggest a different
workflow for working with lvm on hot-pluggable USBs?
Recipe follows:
Set up:
# (Actual number of partitions, etc., is not important here.)
# Assume attached disk is /dev/sdc and it has an extended partition #+ that
covers that whole disk.
# Prepare partitions for LVM (say, 2 partitions)
$ parted /dev/sdc mkpart logical START1 END1
$ parted /dev/sdc mkpart logical START2 END2
# Create Physical Volumes
$ pvcreate /dev/sdc1
$ pvcreate /dev/sdc2
# Identify the Physical Volumes' UUIDs
$ blkid
# Create Volume Groups using PVs **UUIDs**
***********'
$ vgcreate [options] myVG /dev/disk/by-uuid/UUID-OF-PART-1
***********'
$ vgexted [options] myVG /dev/disk/by-uuid/UUID-OF-PART-2
# From this point I can "forget" that I deal with a USB drive, and #+
continue the set up as with built in drives; right?
[snip]
Thanks,
Itay
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