User's Manual

Table 12 Failback Settings by operating system
Supported settingsDefault behaviorOperating system
No Preference
Path A/B – Failover Only
Host follows the unit
1
HP-UX
Path A/B – Failover/Failback
No Preference
Path A/B – Failover Only
Host follows the unit
1
IBM AIX
Path A/B – Failover/Failback
No Preference
Path A/B – Failover Only
Host follows the unit
1
Linux
Path A/B – Failover/Failback
No PreferenceHost follows the unitOpenVMS
Path A/B – Failover Only
Path A/B – Failover/Failback
(recommended)
No PreferenceHost follows the unit
1
Oracle Solaris
Path A/B – Failover Only
Path A/B – Failover/Failback
No Preference
Path A/B – Failover Only
Host follows the unit
1
VMware
Path A/B – Failover/Failback
No PreferenceFailback performed on the hostWindows
Path A/B – Failover Only
Path A/B – Failover/Failback
1
If preference has been configured to ensure a more balanced controller configuration, the Path A/B – Failover/Failback setting is
required to maintain the configuration after a single controller reboot.
Changing virtual disk failover/failback setting
Changing the failover/failback setting of a virtual disk may impact which controller presents the
disk. Table 13 (page 31) identifies the presentation behavior that results when the failover/failback
setting for a virtual disk is changed.
NOTE: If the new setting moves the presentation of the virtual disk to a new controller, any
snapshots or snapclones associated with the virtual disk are also moved.
Table 13 Impact on virtual disk presentation when changing failover/failback setting
Impact on virtual disk presentationNew setting
None. The disk maintains its original presentation.No Preference
If the disk is currently presented on Controller 2, it is moved to Controller 1.
nl
Path A Failover
If the disk is on Controller 1, it remains there.
If the disk is currently presented on Controller 1, it is moved to Controller 2.
nl
Path B Failover
If the disk is on Controller 2, it remains there.
If the disk is currently presented on Controller 2, it is moved to Controller 1.
nl
Path A Failover/Failback
If the disk is on Controller 1, it remains there.
If the disk is currently presented on Controller 1, it is moved to Controller 2.
nl
Path B Failover/Failback
If the disk is on Controller 2, it remains there.
Failback preference setting for HSV controllers 31