Changing virtual disk failover/failback setting, 4 failback settings by operating system, Table 4 – HP 4000.6000.8000 Enterprise Virtual Arrays User Manual
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Setting
Point in time
Behavior
At initial presentation
The units are brought online to Controller
B.
On dual boot or controller resynch
If cache data for a LUN exists on a
particular controller, the unit will be
brought online there. Otherwise, the
units are brought online to Controller B.
On controller failover
All LUNs are brought online to the
surviving controller.
Path B - Failover/
Failback
On controller failback
All LUNs remain on the surviving
controller. After controller restoration,
the units that are online to Controller
A and set to Path B are brought online
to Controller B. This is a one time
occurrence. If the host then moves the
LUN using SCSI commands, the LUN will
remain where moved.
Table 4 Failback Settings by Operating System
Operating system
Default behavior
Settings supported
Windows®
Auto failback done by the host
No Preference, Path A/B - Failover
Only.
Sun Solaris®
Auto failback done by the host
No Preference, Path A/B - Failover
Only.
HP-UX
Autoback done by the host
No Preference, Path A/B - Failover
Only.
IBM AIX
Auto failback done by the host
No Preference, Path A/B - Failover
Only.
Tru64 UNIX
Host follows the unit
All settings allowed.
Recommended setting: Path
A/B - Failover/Failback.
VMS (7.3-1 and greater)
Host follows the unit
All settings allowed.
Recommended setting: Path
A/B - Failover/Failback.
Linux
Auto failback done by the host
No PreferencePath A/B - Failover
Only
Novell NetWare
Auto failback done by the host
No PreferencePath A/B - Failover
Only
Changing virtual disk failover/failback setting
Changing the failover/failback setting of a virtual disk may impact which controller presents the disk.
identifies the presentation behavior that results when the failover/failback setting for a virtual
disk is changed.
NOTE:
If the new setting causes the presentation of the virtual disk to move to a new controller, any snapshots
or snapclones associated with the virtual disk will also be moved.
4000/6000/8000 Enterprise Virtual Array user guide
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