mount LVM duplication drives Post: 302120833

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Top Forums UNIX for Advanced & Expert Users mount LVM duplication drives Post 302120833 by craigp84 on Friday 8th of June 2007 11:49:09 AM

06-08-2007

Registered User

Quote:

Originally Posted by onthetopo

1.I want to have a cloned disk as bootable backup
2.When booting using the master drive, I also want to mount the cloned backup disk so I can do incremental backup of certain files Smilie

. and use the clone disk as free disk space.

I think you're looking at this the wrong way.

You have 2 disks, one is larger (backup disk) than the other (primary disk) from what i understand.

In that case, you will partition the primary disk as you wish, but will make them Software RAID volumes. On disk 2 - the backup - you'll create the exact same partitions of the same size, with partition type = Software Raid.

At this point you have one disk fully allocated - the primary, and one which is an exact copy (man sfdisk for the easy way to make an exact copy) plus some free space at the end. Go ahead and create an extra partition for the free space, this will be your backup area.

Configure the software raid (there's thousands of docs on this so i wont repeat), configure your boot loader to boot disk 2 if disk 1 fails, then setup your backup process (rsnapshot?) to backup to the "spare" partition at the end of disk 2.

Hope this helps you see the concept & a more workable way to achieve.

-c

craigp84

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vxconfigbackupd

vxconfigbackupd(1M)													       vxconfigbackupd(1M)

NAME

       vxconfigbackupd - disk group configuration backup daemon

SYNOPSIS

       vxconfigbackupd [-l]

DESCRIPTION

       The vxconfigbackupd daemon automatically backs up information about a disk group's new configuration whenever the configuration is changed.

OPTIONS

       -l	 Logs backup daemon activities to the file /etc/vx/cbr/bkdaemonLog.

FILES

       /sbin/init.d/vxvm-recover
		 Startup file for vxconfigbackupd.

       /etc/vx/cbr/bk/dgname.dgid/dgid.dginfo
		 Location of backup file for disk group information.

       /etc/vx/cbr/bk/dgname.dgid/dgid.diskinfo
		 Location of backup file for disk attributes.

       /etc/vx/cbr/bk/dgname.dgid/dgid.binconfig
		 Location of backup file for binary configuration copy.

       /etc/vx/cbr/bk/dgname.dgid/dgid.cfgrec
		 Location of backup file for configuration records in vxprint -m format.

NOTES

       The vxconfigbackup command can be used to back up a disk group's configuration manually at any desired time.

       The  disk  group  configuration	backup and restore utilities do not save any data in the public region. This includes file system or other
       application data that is configured within VxVM objects.

       When a disk group is destroyed, its configuration backup information (including the backup directory) is also removed.  The only  exception
       to this behavior is when the disk group is in the precommit state of restoration.

       The  backup  directory should be large enough to accommodate copies of all the currently imported disk groups. The minimum recommended size
       of the backup directory is P * (N + 1) megabytes, where P is the private region in megabytes (by default, 32MB), and N  is  the	number	of
       disk  groups. The additional P megabytes is required to hold a temporary copy of the disk group configuration when a disk group is imported
       or a configuration change is made.

       The default backup directory is /etc/vx/cbr/bk.	The location of the backup directory can be configured	by  using  the	vxconfigbackup	-l
       backup_directory_path command.

SEE ALSO

       vxconfigbackup(1M), vxconfigrestore(1M)

VxVM 5.0.31.1							    24 Mar 2008 					       vxconfigbackupd(1M)

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