HP XP P9500 Storage - Manual (Page 153)

Thus:
•
Each site should have two command devices mapped via two target ports to the other two
sites.
•
Each site should also have two remote command devices mapped-to via external ports from
the other two sites.
The following illustration shows this command/remote command device configuration.
Figure 24 Remote command device configuration for delta resync
When mapping to remote command devices on each site is complete, you must assign mirror IDs
to the remote command devices. This is required to enable communication for delta resync
operations.
Assigning mirrors to remote command devices
The use of mirrors with remote command devices allows you to determine whether the delta resync
operation can be performed. You assign mirror IDs after setting up remote command devices as
described in the previous topic.
Prerequisites
•
To assign a mirror to a remote command device, the mirror’s status must be one of the following:
Initial, Active, Halt, Stopped, Hold, Holding, or Holding(Failure)
To use a mirror in Initial status, it must have mirror ID 00.
•
Perform this operation per journal.
•
In a journal, you can assign multiple mirrors to two remote command devices in one operation.
Procedure 40 To assign mirror IDs to remote command devices
1. In Remote Web Console, select Actions > Remote Copy > Continuous Access Journal Z >
Journal Operation. The Journal Operation window displays.
2. In the tree, select a master or restore journal below Registered > LDKC00.
3. In the mirror list, right-click the mirror that you want to assign to the remote command device,
and click Mirror > Assign R-Cmd. Dev from the menu that displays. The Assign Remote
Command Device dialog box displays, as shown below.
Delta resync configuration 153