HP StorageWorks 4400 User Manual page 38

Setting Point in time
On controller failback
At initial presentation
On dual boot or controller resynch
Path A - Failover Only
On controller failover
On controller failback
At initial presentation
On dual boot or controller resynch
Path B - Failover Only
On controller failover
On controller failback
At initial presentation
On dual boot or controller resynch
Path A - Failover/Fail-
On controller failover
back
On controller failback
Path B - Failover/Fail-
At initial presentation
back
38 EVA4400 operation
Behavior
All LUNs remain on the surviving control-
ler. There is no failback except if a host
moves the LUN using SCSI commands.
The units are brought online to Controller
1.
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 1.
All LUNs are brought online to the surviv-
ing controller.
All LUNs remain on the surviving control-
ler. There is no failback except if a host
moves the LUN using SCSI commands.
The units are brought online to Controller
2.
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 2.
All LUNs are brought online to the surviv-
ing controller.
All LUNs remain on the surviving control-
ler. There is no failback except if a host
moves the LUN using SCSI commands.
The units are brought online to Controller
1.
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 1.
All LUNs are brought online to the surviv-
ing controller.
All LUNs remain on the surviving control-
ler. After controller restoration, the units
that are online to Controller 2 and set to
Path A are brought online to Controller 1.
This is a one-time occurrence. If the host
then moves the LUN using SCSI com-
mands, the LUN will remain where moved.
The units are brought online to Controller
2.