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Operating Systems Linux Red Hat Increase root file system size ... Post 302545569 by mark54g on Monday 8th of August 2011 10:25:04 PM
Old 08-08-2011
LVM doesn't work on a slice philosophy the way Solaris did. It works on a PV > VG > LV system, where PV is physical volume (a disk or partition), VG is a volume group, the logical construct of one or more PVs, and LV is a section of a VG, made up of extents.

You can add multiple PVs into a VG, even migrating old PVs out and adding new ones in, moving the data around. However, you can't add the existing root volume to a VG without losing the data, as technically, the partition type changes and the data is not encapsulated.

You CAN try to migrate to LVM, but it is not fool proof and if something goes wrong, the data can be destroyed. It is not as safe as I would like to recommend.

http://www.linuxweblog.com/blogs/san...filesystem-lvm
http://tldp.org/HOWTO/LVM-HOWTO/upgraderoottolvm.html

Last edited by mark54g; 08-08-2011 at 11:30 PM..
 

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PVREMOVE(8)						      System Manager's Manual						       PVREMOVE(8)

NAME
pvremove - remove a physical volume SYNOPSIS
pvremove [-d|--debug] [-h|--help] [-t|--test] [-v|--verbose] [--version] [-f[f]|--force [--force]] [-y|--yes] PhysicalVolume [PhysicalVol- ume...] DESCRIPTION
pvremove wipes the label on a device so that LVM will no longer recognise it as a physical volume. OPTIONS
See lvm(8) for common options. -ff, --force --force Force the removal of a physical volume belonging to an existing volume group. Normally vgreduce(8) should be used instead of this command. You cannot remove a physical volume which in use by some active logical volume. -y, --yes Answer yes to all questions. SEE ALSO
lvm(8), pvcreate(8), pvdisplay(8), vgreduce(8) Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) PVREMOVE(8)
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