10-21-2009
You really don't want to restore from /. If you had problems at the point you did the backup you'll drag them back into your system.
You would be better served following JGT's advice and selectively restoring the /u1 (that was the one, wasn't it?) .
There may be a problem with JGT's advice about restoring stuff to /oldroot. It depends on how much space is left on root after u1 is pulled back in and how much is stored on the tape. Doing a full restore to oldroot is going to pull /u1 into oldroot too. You may need to do a partial restore to get just those things you may need.
I'll put in a plug here for backupedge or lonetar. They are a better backup method than tar due to verifications and reporting capabilities. I've used both but find lonetar's reporting to create more messages than I need.
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LEARN ABOUT HPUX
vgcfgrestore
VGCFGRESTORE(8) System Manager's Manual VGCFGRESTORE(8)
NAME
vgcfgrestore - restore volume group descriptor area
SYNOPSIS
vgcfgrestore [-d|--debug] [-f|--file filename] [-l[l]|--list] [-h|--help] [-M|--Metadatatype1|2] [-t|--test] [-v|--verbose] VolumeGroupName
DESCRIPTION
vgcfgrestore allows you to restore the metadata of VolumeGroupName from a text backup file produced by vgcfgbackup. You can specify a
backup file with --file. If no backup file is specified, the most recent one is used. Use --list for a list of the available backup and
archive files of VolumeGroupName.
OPTIONS
-l | --list -- List files pertaining to VolumeGroupName
List metadata backup and archive files pertaining to VolumeGroupName. May be used with the -f option. Does not restore Vol-
umeGroupName.
-f | --file filename -- Name of LVM metadata backup file
Specifies a metadata backup or archive file to be used for restoring VolumeGroupName. Often this file has been created with vgcfg-
backup.
See lvm for common options.
REPLACING PHYSICAL VOLUMES
vgdisplay --partial --verbose will show you the UUIDs and sizes of any PVs that are no longer present. If a PV in the VG is lost and you
wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate) to
initialise it with the same UUID as the missing PV. Repeat for all other missing PVs in the VG. Then use vgcfgrestore --file filename to
restore the volume group's metadata.
SEE ALSO
lvm(8), vgcreate(8)
Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) VGCFGRESTORE(8)