HP 3000 Enterprise Virtual Array - Manual (Page 36)

Changing virtual disk failover/failback setting
Changing the failover/failback setting of a virtual disk may impact which controller presents the disk.
Table 4 identifies the presentation behavior that results when the failover/failback setting for a virtual
disk is changed.
NOTE:
If the new setting causes the presentation of the virtual disk to move to a new controller, any snapshots
or snapclones associated with the virtual disk will also be moved.
Table 4 Impact on virtual disk presentation when changing failover/failback setting
New setting Impact on virtual disk presentation
No Preference None. The disk maintains its original presentation
Path A Failover If the disk is currently presented on controller B, it is moved to
controller A. If the disk is on controller A, it remains there.
Path B Failover If the disk is currently presented on controller A, it is moved to
controller B. If the disk is on controller B, it remains there.
Path A Failover/Failback If the disk is currently presented on controller B, it is moved to
controller A. If the disk is on controller A, it remains there.
Path B Failover/Failback If the disk is currently presented on controller A, it is moved to
controller B. If the disk is on controller B, it remains there.
Obtaining a license key
There is no longer a licensing requirement for initialization of the Enterprise Virtual Array storage system
controllers and firmware. However, implementation of the value-added Business Copy EVA or Continuous
Access EVA products on Enterprise Virtual Array systems does require licensing. Licensing of the snapshot
capability on an Enterprise Virtual Array storage system is included as part of the Business Copy EVA
license. Activation procedures for Business Copy EVA and Continuous Access EVA licenses are provided
with the purchase of the license.
Business Copy EVA
Business Copy EVA can create nearly instantaneous copies of any active volume on the Enterprise
Virtual Array for use by other applications or systems for batch processing, backup, or testing, without
interrupting current workflow. This data replication eliminates data movement between the host and
storage device. Business Copy EVA offers licenses for several capacity levels, based on replicated
capacity, rather than on total system capacity.
Continuous Access EVA
Continuous Access EVA provides remote data replication functionality on the EVA and requires a
separate license for each HSV controller pair. The Continuous Access EVA license is purchased using
its own part number.
Setting up the storage system hardware
To install the storage system hardware, the following procedures must be performed by an authorized
service representative. Contact your service representative before proceeding.
• Complete the prerequisites.
• Verify the site requirements.
36 Startup and operation