How to Recover an Ibrix Logical Volume (ILV)

How to Recover an Ibrix Logical Volume (ilv)

Solution ID: 00000074

Created: 10/1/2008

DETAILS:

Recovering an Segment/LV Procedure

On the FM grab the lvm config file for the "ilv#" device ... and copy that "vg.date"

file to the server owner of the segment.

FM location for this file is in:

/usr/local/ibrix/web/lvm

should see something like this:

ivg1.20080520_113527

copy the later file which has the ilv# info in it to the missing segment's server to

/tmp and use cfgrestore on the server as follows:

syntax:

#/usr/sbin/vgcfgrestore -ll -n /dev/ivg1 -f /path/to/ivg1.date_file

example:

vgcfgrestore -ll -n /dev/ivg1 -f ivg1.20080520_113529

File: ivg1.20080520_113529

VG name: ivg1

Description: /usr/sbin/vgcfgbackup -f /etc/lvm/backup/ivg1.20080520_113529

ivg1

Backup Time: Tue May 20 11:35:29 2008

Last resort if the ibrix_pv -a -o /dev/mapper on the server nor a reboot worked to

recognize the damaged/overwritten lun is time to initialize the pv and restore lv

metadata as illustrated below:

First if there are partitions on the disk from a relabel job or someone inadvertently

installed linux onto the SAN disk stomp on this with:

#pvcreate -ff /dev/mapper/mpath#

#pvcreate --restorefile /etc/lvm/backup/ivg1 --uuid r0JdHv-9o4A-YZar-zL7e-m3to-

urgf-pu41L2 /dev/mapper/ibrixpath01 -ff

PAGE 1
How to Recover an Ibrix Logical Volume (ilv) Solution ID: 00000074 Created: 10/1/2008 DETAILS: Recovering an Segment/LV Procedure On the FM grab the lvm config file for the "ilv#" device ... and copy that "vg.date" file to the server owner of the segment. FM location for this file is in: /usr/local/ibrix/web/lvm should see something like this: ivg1.
PAGE 2
another example used at Discover e-Legal is as follows: pvcreate --restorefile /etc/lvm/backup/ivg22 --uuid OfVkK7-RsRj-hXdr-rx8j-VTD5wHH7-Is8AYk /dev/emcpowerz -ff You will be asked: Really INITIALIZE physical volume "/dev/mpath/mpath2" of volume group "ivg2" [y/n]? y Where the --uuid # above comes from the backup ivg#.date_file under the PV section which is the first of the 3 ids in the file here is the line to grab the --uuid# from i.e.
PAGE 3
Run following command from server that ownes the segment, we run this mkibfs command to Format new segment with mkibfs: syntax example: mkibfs device_path fsname fsid segnumber nsegs SS_hostid 1.
PAGE 4
5. If necessary an Ibrix Customer Service Engineer may request clean up of any directories in the file system that may now have invalid references left over from underlying storage events, ibrestich, etc...by running ibdircheck. From any segment server run the following command against the entire file system.