Instruction Manual

Table 2 Failback Preference Settings
Setting Point in time
Behavior
At initial pres
entation
Theunitsareal
ternately b rought online
to Controller
A or to Controller B.
On dual boot or controller resynch
IfcachedataforaLUNexistsona
particular controller, the unit will be
brought online there. O th erwise, the
units are alternately brought online to
Controller A or to Controller B.
On controller failover
All LUNs are brought online to the
surviving controller.
No preference
On controller failback
All LUNs rem
ain on the surviving
controller. There is no failback except
if a host moves the LUN using SCSI
commands.
At initial presentation The units are brought online to Controller
A.
On dual boot or controller resynch
IfcachedataforaLUNexistsona
particular controller, the unit will be
brought online there. O th erwise, the
units are brought online to Controller A.
On contr
oller failover
All LUNs are brought online to the
surviving controller.
Path A - Failover
Only
On controller failback
All LUNs remain on the surviving
controller. There is no failback except
if a host moves the LUN using SCSI
commands.
At initial presentation The units are brought online to Controller
B.
On dual boot or controller resynch
If cac
he data for a LUN exists on a
part
icular controller, the unit will be
brou
ght online there. O therwise, the
unit
s are brought online to Controller B.
On controller failover
All LUNs are brought online to the
surviving controller.
Path B - Failover Only
On controller failback
All LUNs remain on the surviving
controller. There is no failback except
if a host moves the LUN using SCSI
commands.
34
Startup and operation