Failback settings by operating system – HP 3000 Enterprise Virtual Array User Manual
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Setting
Point in time
Behavior
At initial presentation
The units are brought online to Controller
A.
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 A.
On controller failover
All LUNs are brought online to the
surviving controller.
Path A - Failover/
Failback
On controller failback
All LUNs remain on the surviving
controller. After controller restoration,
the units that are online to Controller
B and set to Path A are brought online
to Controller A. This is a one time
occurrence. If the host then moves the
LUN using SCSI commands, the LUN will
remain where moved.
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 3 Failback Settings by Operating System
Operating system
Default behavior
Settings supported
Windows® Secure Path
Autoback done by the host
No Preference, Path A/B - Failover
Only.
Sun Solaris® Secure Path
Autoback done by the host
No Preference, Path A/B - Failover
Only.
HP-UX Secure Path
Autoback done by the host
No Preference, Path A/B - Failover
Only.
IBM AIX Secure Path
Autoback 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.
Novell Netware Secure Path
Autoback done by the host
No Preference, Path A/B - Failover
Only.
Enterprise Virtual Array 3000/5000 user guide (VCS 3.110)
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