HP 6400/8400, User Manual

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Failback preference setting for HSV controllers
Table 12 describes the failback preference behavior for the controllers.
Table 12 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 partic-
ular controller, the unit will be brought
online there. Otherwise, the units are al-
ternately brought online to Controller A or
to Controller B.
On dual boot or controller resynch
All LUNs are brought online to the surviv-
ing controller.
On controller failover
All LUNs remain on the surviving control-
ler. 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 partic-
ular controller, the unit will be brought
online there. Otherwise, the units are
brought online to Controller A.
On dual boot or controller resynch
All LUNs are brought online to the surviv-
ing controller.
On controller failover
All LUNs remain on the surviving control-
ler. 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 partic-
ular controller, the unit will be brought
online there. Otherwise, the units are
brought online to Controller B.
On dual boot or controller resynch
All LUNs are brought online to the surviv-
ing controller.
On controller failover
All LUNs remain on the surviving control-
ler. 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/Fail-
back
HP StorageWorks 6400/8400 Enterprise Virtual Array user guide 47