On 12 Jun 2011 at 11:01, Milan Broz wrote: Date sent: Sun, 12 Jun 2011 11:01:41 +0200 From: Milan Broz <mbroz@redhat.com> To: LVM general discussion and development <linux- lvm@redhat.com> Copies to: "Michael D. Setzer II" <mikes@kuentos.guam.net> Subject: Re: Question on LVM and Bare Metal Restore? > On 06/12/2011 12:44 AM, Michael D. Setzer II wrote: > > > Backing up the regular partitions that contain an LVM has been > > always been available, and backing up the whole disk image. > > Recent versions have added the ability to backup the LVM dm > > partitions as well. Backing up and restore works fine as long as > > the LVM setup is already there, but it a disk completely fails one > > would need to recreate the LVM before being able to restore it. > > Recovery is very easy with LVM (once you find how to do that:-) > > I suggest you read the LVM documentation, mainly > the section 6. LVM troubleshooting. > > http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Logical_Volume_Manager_Administration/index.html > > All you need to recover LVM metadata is metadata backup > (automatically maintained in /etc/lvm or directory specified in lvm.conf) > and then something like > pvcreate -u <uuid> --restorefile <backup file> <PV> # only if PV header is lost! > vgcfgrestore -f <backup file> <VG> > > Milan > Thanks for both messages, they will give me a starting point to test. In doing a backup of a 250GB physical partition with a LVM and swap it takes about 1 hour and 40 minutes to backup, but only 20 minutes to use fsarchiver to backup the lvm root directly. Perhaps adding vgcfgbackup and vgcfgrestore options to the mbr backup section will work. Will have to setup a test machine, and see if I can complete wipe the disk, and have it restore LVM from scratch. Thanks again. +----------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor Guam Community College Computer Center mailto:mikes@kuentos.guam.net mailto:msetzerii@gmail.com http://www.guam.net/home/mikes Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +----------------------------------------------------------+ http://setiathome.berkeley.edu (Original) Number of Seti Units Returned: 19,471 Processing time: 32 years, 290 days, 12 hours, 58 minutes (Total Hours: 287,489) BOINC@HOME CREDITS SETI 10870621.860383 | EINSTEIN 6012510.330851 ROSETTA 3240336.813559 | ABC 6279463.408252 _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
