HP StorageWorks XP Remote Web Console Software - Manual (Page 115)

TrueCopy for z/OS user guide 115
Figure 64 Add Pair (Asynchronous) window
NOTE: When you set the several pairs at once and you want to keep some of the individual settings,
leave the parameter box blank. Then, only the parameters you enter are available.
• M-VOL: Device ID of the M-VOL.
NOTE: If # is added to the end of an LDEV number, such as 00:3F#, the LDEV is an external
volume. For more information about external volumes, see Hitachi HPAV for z/OS User Guide.
• R-VOL: Select the R-VOL device ID for the specified M-VOL. If you selected more than one volume,
R-VOLs will automatically be assigned to the rest of the selected M-VOLs based on device ID. For
example, if you select three volumes on the Volume list and select LUN01 as R-VOL for the first M-VOL,
R-VOLs of the following M-VOLs are LUN02 and LUN03.
NOTE: Verify all the assigned R-VOLs are available. If the automatically assigned R-VOLs are
already used for the other operation, you have to modify the R-VOL individually (see ” Modifying
Parameters and Omitting Selected Volumes ” on page 111 for instructions).
• RCU: Select an RCU (Serial number, CU number, SSID, and Port type) for the TC390 pair(s) being
created. The RCUs that are already registered can be selected from the list. The RCU must be the same
for all pairs being created during this operation.
• M-VOL Fence Level: The M-VOL Fence Level option (TC390 Synchronous only) specifies the conditions
under which the MCU will reject write operations to the M-VOL, which is known as “fencing.” This
option is very important for disaster recovery planning (see ” Considering the M-VOL Fence Level
Setting ” on page 135). TC390A M-VOLs are never fenced.
• If Data is selected, the M-VOL will be fenced when the MCU cannot successfully execute an update
copy operation for any reason. This setting is functionally equivalent to the CRIT(YES-ALL) parameter
for the CESTPAIR command.