On Thu, Nov 21, 2002 at 10:38:31AM -0600, Steven Lembark wrote: > > > -- "Heinz J . Mauelshagen" <mauelshagen@sistina.com> > > > On Tue, Nov 19, 2002 at 09:50:39PM +0100, kalle@idlar.nu wrote: > >> Hi! > >> > >> Im researching some diffrent what-if-scenarios to be more prepared if > >> our lvm fails. and I'm wondering..Is there any utility to find which > >> file (or fs inode) a specific LE/PE is assigned to? > > > ># lvdisplay -v /dev/YourVG/YourLV # displays mapping logical -> physical > ># extents lvdisplay -v /dev/YourPV # displays mapping physical -> logical > ># extents > > > >> What I would like to acomplish it to be able to know what files are > >> located on a specific disk in a > >> > >> VG/LV. So if I detect that a disk in a LV is starting to fail I would > >> like to know which files are more > >> > >> likely to be non-recoverable. > > > > You need to 'ask' the filesystem, where it puts stuff ;) > > I.e. "debugfs /dev/YourVG/YourLV" for ext[23]. > > The unit of failure, for all pratical purposes, is the LV > (unless you are into using dd on raw disk devices to make > your backups). If one drive is likely to fail then any LV > crossing that LV is going to get fried (short of RAID) and > will have to be restored. With LVM2 (and deprecated LVM1.1) you are able to activate a VG even though some of its PVs are inaccessable. If any filesystem is mountable still depends on the availability of alternate superblocks and (at least) the root directory. > > > > -- > Steven Lembark 2930 W. Palmer > Workhorse Computing Chicago, IL 60647 > +1 800 762 1582 > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
