HP StorageWorks XP Remote Web Console Software - Manual (Page 147)

If a TrueCopy for Mainframe pair is established using PPRC commands, the CFW data option
is set to the Copy to R-VOL setting.
By using Remote Copy Function Switch, you can set the following option with CESTPAIR: CFW
data = only M-VOL. To use this function, contact your HP service representative.
•
DFW to R-VOL (Synchronous only): Specifies whether the MCU will suspend a TrueCopy for
Mainframe pair when the RCU cannot execute DFW to the R-VOL:
◦ DFW not required: the pair is not suspended when DFW to the R-VOL is blocked.
◦ DFW required: the pair is suspended when DFW to the R-VOL is blocked.
CAUTION: The interaction of the DFW required setting and the M-VOL fence level setting
can cause a host application to fail with a permanent I/O error when attempting to update
an M-VOL. Keep track of which pairs have the DFW required setting, and make sure that
DFW to the R-VOL is not blocked.
If a TrueCopy for Mainframe pair is established using PPRC commands, the DFW to R-VOL
option is set to the DFW not required setting.
•
Time Stamp (Synchronous only): Specifies whether the host I/O time stamp is transferred from
M-VOL to R-VOL. The default is Disable:
◦ Enable: The host I/O time stamp is transferred from M-VOL to R-VOL.
◦ Disable: The host I/O time stamp is not transferred from M-VOL to R-VOL.
Asynchronous Parameters (Asynchronous only):
•
CT Group: consistency group for the new pair(s). Consistency groups which have already
been added to the current MCU are displayed.
This option cannot be changed after a pair has been added.
Only TrueCopy for Mainframe Asynchronous pairs that belong to the same CLPR can be
allocated to one consistency group. For further information on CLPR, see the HP StorageWorks
XP24000/XP20000 Disk/Cache Partition User's Guide.
•
Error Level: Select the desired error level for the new pair(s): Group, or Volume (default =
Group).
The CESTPAIR TSO command also allows you to specify the error level for TrueCopy for
Mainframe Async pairs.
The Cancel button cancels the settings you have made and closes the Add Pair dialog box. Set
sets the parameters and closes the Add Pair dialog box.
To add (establish) one or more TrueCopy for Mainframe pairs:
1. At the remote site:
a.
Make sure that the LVI(s) which will be the R-VOL(s) are offline from all hosts.
b. Connect to the storage system which will be the RCU for the new pair(s), and log on with
Administrator or TrueCopy write access.
c. Make sure that the RCU remote copy port(s) is/are configured to RCU target port(s).
2. At the main site:
a.
Connect to the storage system which will be the MCU for the new pair(s), and log on
with Administrator or TrueCopy write access.
b. Make sure that the MCU remote copy port(s) is/are configured to initiator port(s).
c. Make sure that the correct RCU CU (contains the LVIs that will be R-VOLs) has been added
to the correct MCU CU (contains the LVIs that will be M-VOLs).
3. Click the Pair Operation tab, and select the CU which contains the LVI(s) which will be the
M-VOL(s) of the new pairs. Make sure that you selected proper CU, port, or host group. Use
Creating TrueCopy for Mainframe Pairs 147