Failback preference setting for hsv controllers – HP 6400.8400 Enterprise Virtual Array User Manual
Page 37
Failback preference setting for HSV controllers
describes the failback preference behavior for the controllers.
Table 10 Failback preference behavior
Behavior
Point in time
Setting
The units are alternately brought online to
Controller A or to Controller B.
At initial presentation
No preference
If cache data for a LUN exists on a particular
controller, the unit will be brought online there.
On dual boot or controller resynch
Otherwise, the units are alternately brought
online to Controller A or to Controller B.
All LUNs are brought online to the surviving
controller.
On controller failover
All LUNs remain on the surviving controller.
There is no failback except if a host moves the
LUN using SCSI commands.
On controller failback
The units are brought online to Controller A.
At initial presentation
Path A - Failover Only
If cache data for a LUN exists on a particular
controller, the unit will be brought online there.
On dual boot or controller resynch
Otherwise, the units are brought online to
Controller A.
All LUNs are brought online to the surviving
controller.
On controller failover
All LUNs remain on the surviving controller.
There is no failback except if a host moves the
LUN using SCSI commands.
On controller failback
The units are brought online to Controller B.
At initial presentation
Path B - Failover Only
If cache data for a LUN exists on a particular
controller, the unit will be brought online there.
On dual boot or controller resynch
Otherwise, the units are brought online to
Controller B.
All LUNs are brought online to the surviving
controller.
On controller failover
All LUNs remain on the surviving controller.
There is no failback except if a host moves the
LUN using SCSI commands.
On controller failback
The units are brought online to Controller A.
At initial presentation
Path A -
Failover/Failback
If cache data for a LUN exists on a particular
controller, the unit will be brought online there.
On dual boot or controller resynch
Otherwise, the units are brought online to
Controller A.
All LUNs are brought online to the surviving
controller.
On controller failover
All LUNs remain on the surviving controller.
After controller restoration, the units that are
On controller failback
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.
The units are brought online to Controller B.
At initial presentation
Path B -
Failover/Failback
Failback preference setting for HSV controllers
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