HP XP7 Storage - Manual (Page 130)

Figure 18 Remote command devices in a delta resync configuration
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
You assign the mirror IDs used by the configuration’s journals to the remote command devices.
This enables Cnt Ac-J control information regarding the delta resync to be transferred and then
read at the remote sites. This is necessary for the delta resync operation.
Prerequisite information
•
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 0.
•
Perform this operation for each journal.
•
In a journal, you can assign multiple mirrors to two remote command devices in one operation.
•
A maximum of 16 mirrors can be shared with a remote command device. When a remote
command device is shared, you can use it to do the following:
◦ Assign it to other mirrors
◦ Use it with RAID Manager
130 Configurations with Continuous Access Synchronous