Failback Settings By Operating System - HP EVA P6000 User Manual

Table 7 Failback preference settings (continued)
Setting
Path A -
Failover/Failback
Path B -
Failover/Failback
Table 8 (page 36)
ALUA-compliant multipath software is running with each operating system. Recommended settings
may vary depending on your configuration or environment.
Table 8 Failback settings by operating system
Operating system
HP-UX
IBM AIX
Linux
36 P6300/P6500 EVA operation
Point in time
On controller failover
On controller failback
At initial presentation
On dual boot or controller resynch
On controller failover
On controller failback
At initial presentation
On dual boot or controller resynch
On controller failover
On controller failback
describes the failback default behavior and supported settings when
Default behavior
Host follows the unit
Auto failback done by the host
Auto failback done by the host
Behavior
Otherwise, the units are brought online to
Controller 2.
All LUNs are brought online to the surviving
controller.
All LUNs remain on the surviving controller.
There is no failback except if a host moves the
LUN using SCSI commands.
The units are brought online to Controller 1.
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 1.
All LUNs are brought online to the surviving
controller.
All LUNs remain on the surviving controller.
After controller restoration, the units that are
online to Controller 2 and set to Path A are
brought online to Controller 1. This is a
one-time occurrence. If the host then moves the
LUN using SCSI commands, the LUN will
remain where moved.
The units are brought online to Controller 2.
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 2.
All LUNs are brought online to the surviving
controller.
All LUNs remain on the surviving controller.
After controller restoration, the units that are
online to Controller 1 and set to Path B are
brought online to Controller 2. This is a
one-time occurrence. If the host then moves the
LUN using SCSI commands, the LUN will
remain where moved.
Supported settings
1
No preference
Path A/B – Failover only
Path A/B – Failover/Failback
No preference
Path A/B – Failover only
Path A/B – Failover/Failback
No preference