XVM Volume Manager failover capability

The SAN Volume Controller supports version 2 of XVM failover capability for SGI Origin hosts.

The XVM Volume Manager Administrator's Guide describes the configuration and administration of XVM logical volumes.

You must create and edit the /etc/failover2.conf file.

To set up the SGI host, complete the following steps:

Rescan the HBA ports: scsiha -rp <device>.
Find the physical paths of volumes within XVM: show -v *.
Create SGI labels and partitions on the volume: /usr/bin/fx -x -d <physical path>.
Manually create the /etc/failover2.conf file. For HBA load balancing, use different paths.
Either restart the SGI host or initialize failover.
Label volumes within XVM: label -name <labelname> <path>.
Create slices and volumes within XVM: slice -volname <volname> /phys/<name>.
Create the xfs filesystem on the volumes: mkfs -t xfs <path>.
Create mount directories.
Mount the volumes.
Update /etc/fstab.

The following output provides an example of the failover2.conf file:

#lun0_svc
	/dev/dsk/5005076801000deb/lun0vol/c4p400000 affinity=0 preferred
	/dev/dsk/5005076801000deb/lun0vol/c3p200000 affinity=0
	/dev/dsk/5005076801000df8/lun0vol/c3p100000 affinity=1
	/dev/dsk/5005076801000df8/lun0vol/c4p300000 affinity=1
#lun1_svc
	/dev/dsk/5005076801000deb/lun1vol/c3p100000 affinity=0 preferred
	/dev/dsk/5005076801000deb/lun1vol/c4p300000 affinity=0
	/dev/dsk/5005076801000df8/lun1vol/c4p400000 affinity=1
	/dev/dsk/5005076801000df8/lun1vol/c3p200000 affinity=1

To display, configure, or change the settings for the XVM physical volumes, complete the following steps:

Use the XVM hardware inventory command to display the actual status for preferred / alternate paths: hinv –c disk
Use the XVM foconfig command to parse the failover2.conf file on a running system and configure the settings for the preferred or alternate path.
Use the XVM foswitch command to change the settings for the preferred or alternate path and access a physical volume.