Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

3-18 Preparing for TrueCopy for z/OS Operations
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Channel Extenders for Serial Remote Copy Connections
TrueCopy for z/OS Async (TCzA) can be integrated with third-party channel
extender products to provide remote data backup for distances greater than
43 km. The following information was current at the time of publication of this
document, but may change. Please contact your Hitachi account team for the
latest information on channel extender support for TCz.
Note: For fibre-channel interface connections, you can use the switches as for
ordinary switch connections, and no special settings are required for the
USP Vs.
• TrueCopy for z/OS has been tested with the CNT UltraNet Storage Director:
– UltraNet supports T3 and ATM (asynchronous transfer mode)
communication lines.
– UltraNet supports ATM OC-3 (optical carrier) levels. The transfer speed of
OC-3 is a maximum of 155 Mb/s.
– The transfer speed of T3 is a maximum of 44 Mb/s.
• The USP Vs’ serial numbers must be set on the channel extenders as follows.
If the serial numbers are not set correctly, the TCz add pair operation will
terminate with an error. For CNT UltraNet, this operation must be coordinated
with the Hitachi representative and performed by the CNT representative.
– Set the RCU serial number to the MCU-side extender.
– Set the MCU serial number to the RCU-side extender.
– Set the serial number on each CNT UltraNet port.
• Make sure that your channel extenders are capable of supporting the TCzA
channel command. The parameter length and detailed specification of the
TCzA channel command are different than for TCz Synchronous RIOs.
• The LDEV IDs of the R-VOLs must be assigned on each port of the MCU-side
extender. The maximum number of LDEVs which can be assigned on each
port is 254. Figure 3-5 shows the required LDEV assignment on each
extender port. If the LDEV IDs are not assigned properly, the TCz add pair
operation will terminate with an error. For CNT UltraNet, this operation must
also be performed by the CNT representative.