Sorry, a few typo's fixed from my previous response.. -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Geofrey Rainey Sent: Friday, 12 June 2009 2:54 p.m. To: General Red Hat Linux discussion list Subject: RE: LVM level snapshot backup and restore I don't think a snapshot image can be used to create a backup of a logical Partition by itself because the snapshot image only contains changes (actually I think it contains the copies of the old blocks - like the redo logs in a database), thus the original partition is needed to restore the data and if you've destroyed this with your partition extension, the snapshot won't help. Therefore, I'd be inclined to backup your lvm partition Like the following (this is how I do it): 1. create a snapshot file - this can probably be quite small (depending on usage but 1G is probably enough) lvcreate -s -L 1G -n <name of snapshot> /dev/<volume_group>/<logical_volume_name> 2. then backup your partition with something like this: dd if=/dev/<volume_group>/<name of snapshot> of=<path/lvm_backup.img> bs=1M 3. if you need to restore, do the following: dd if=< path/lvm_backup.img of=/dev/<volume_group>/<logical_volume_name> Of course you'll need as much space as the original partition for this but that's the only solution I think. -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Narayanan, Karthikeyan Sent: Friday, 12 June 2009 10:55 a.m. To: redhat-list@xxxxxxxxxx Subject: Re: LVM level snapshot backup and restore Hi There, I have a production server which requires a logical volume expansion. The file system which requires expansion is not yet placed in the backup rotation. Before expanding the file system, I wanted to setup a LVM snapshot to ensure we have a proper backup in case of a failure during expanding the volume. Can anyone here describe me the steps to do? Thanks Karthik -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe https://www.redhat.com/mailman/listinfo/redhat-list ========================================================== For more information on the Television New Zealand Group, visit us online at tvnz.co.nz ========================================================== CAUTION: This e-mail and any attachment(s) contain information that is intended to be read only by the named recipient(s). This information is not to be used or stored by any other person and/or organisation. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list ========================================================== For more information on the Television New Zealand Group, visit us online at tvnz.co.nz ========================================================== CAUTION: This e-mail and any attachment(s) contain information that is intended to be read only by the named recipient(s). This information is not to be used or stored by any other person and/or organisation. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
