HP XP P9500 Storage - Manual (Page 36)

Figure 4 Connections between Supervisor, Subordinate DKCs
By using fibre-channel switches, target ports can also be connected to RCU target ports on the
secondary systems. See
“Planning ports for data transfer ” (page 46) for more information.
CAUTION: Performing maintenance operations on remote command devices (for example, the
devices A' and B' in above figure) used for connections between secondary systems cause the
pairs to be suspended as if a failure had occurred. To avoid this, before performing maintenance
tasks, remove all journals in the extended consistency group that use the remote command devices
under maintenance.
Planning extended consistency groups (EXCTG)
An EXCTG is a collection of journals in which data consistency is guaranteed. You register journals
in an EXCTG when performing copy operations between multiple primary systems and multiple
secondary systems. See
“Using extended consistency groups” (page 51) for planning and set up
information.
Planning for previous models
Continuous Access Journal Z can be used to perform remote copy operations between P9500 and
XP24000/XP20000 Disk Array or XP12000 Disk Array.
To perform remote copy between P9500 and XP24000/XP20000 Disk Array or XP12000 Disk
Array, observe the following:
•
Configure a remote path between LDKC00 of the P9500 system and the XP24000/XP20000
Disk Array.
◦ More than one XP24000/XP20000 Disk Array can be connected to LDKC00 of P9500.
◦ LDKC01 cannot be used.
Use the configuration instructions in “Configuration operations” (page 59) .
•
Both systems must be set up as shown in the figure below.
36 Planning volumes, P9500 systems