Failback Preference Setting For Hsv Controllers - HP 6400/8400 User Manual

Failback preference setting for HSV controllers

Table 1 1 (page 37)
Table 1 1 Failback preference behavior
Setting
No preference
Path A - Failover Only
Path B - Failover Only
Path A -
Failover/Failback
Path B -
Failover/Failback
describes the failback preference behavior for the controllers.
Point in time
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
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
At initial presentation
Behavior
The units are alternately brought online to
Controller A or to Controller B.
If cache data for a LUN exists on a particular
controller, the unit will be brought online there.
Otherwise, the units are alternately brought
online to Controller A or to Controller B.
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 A.
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.
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 B.
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.
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 A.
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.
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 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.
Failback preference setting for HSV controllers 37