Instruction Manual

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 fo
raLUNexistsona
particular co
ntroller, the unit will be
brought onlin
ethere. Otherwise,the
units are brou
ght online to Controller A.
On c ontroller failover
All LUNs are brought online to the
surviving controller.
Path A - Failover/
Failback
On c ontroller failback
All LUNs remain on t he 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 comman ds, the LUN will
remain where moved.
At initia
lpresentation
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 c ontroller failover
All LUNs are brought online to the
surviving controller.
Path B - Failover/
Failback
On c ontroller failback
All LUN
s remain on the surviving
controller. After controller restoration,
the units that are online to Controller
A a nd set to Path B are brought online
toControllerB.Thisisaonetime
occurrence. If the host then moves the
LUN using SCSI comman ds, the LUN will
remain where moved.
Enterprise Virtual Array 3000/5000 user guide (VCS 3.110)
47