Hitachi TrueCopy for z/OS user guide (December 2005)

16 TrueCopy for the XP128/XP1024/XP10000/XP12000

The RAID-protected SI390 duplicates are created within the same XP128/XP1024/XP10000/XP12000 at

hardware speeds. SI390 can be used in conjunction with TC390 to maintain multiple copies of critical

data at your primary and/or secondary (remote) sites. For more information on combining TC390 and

SI390 operations, see ”Combining TrueCopy and ShadowImage” on page 57.

Hitachi Extended Remote Copy

The Hitachi Extended Remote Copy (HXRC) feature of the XP128/XP1024/XP10000/XP12000 is

functionally compatible with the industry-standard IBM Extended Remote Copy (XRC) host software function

and is provided as a program product. HXRC is also compatible with the DFSMS® data mover that is

common to the XRC environment. HXRC operations are performed in the same manner as XRC operations,

by issuing XRC TSO commands from the host system to the XP128/XP1024/XP10000/XP12000.

This chapter provides disk array-specific HXRC information (for example, SVP modes), but does not cover

XRC operations.

SVP modes: For important information on XP128/XP1024/XP10000/XP12000 SVP modes for HXRC,

refer to Table 3 on page 20.

16 session support: The XP128/XP1024/XP10000/XP12000 must be configured with 3990-6E

emulation (no 3380 LVIs) and 256 LDEVs/SSID for 16 session (per disk array) support. APAR OW36948

must be applied. A disk array power cycle is required when the SSID boundary is changed (64Û256).

Device blocking, load balancing: For important information on HXRC device blocking support and load

balancing control, refer to ”HXRC Device Blocking and Load Balancing” on page 201.

Changing from 3990 to 2105: For important information and instructions on changing from 3990 to 2105

emulation for disk arrays with existing HXRC volumes, refer to ”CU Emulation Types” on page 22.

HXRC operations, as well as TC390A operations, use additional cache to store the sidefile queue of

asynchronous recordsets. If you are maintaining HXRC pairs and TC390A pairs, verify that your

XP128/XP1024/XP10000/XP12000 has adequate cache installed and available to support your

asynchronous remote copy workloads. Contact your HP account support representative to determine how

much cache will be needed for your disk array configuration.

NOTE: If the ANTX5123W console message is displayed during the RESUME operation for HXRC pairs,

the operation might be unsuccessful. In this case, you must perform the XDELPAIR operation to delete the

pairs, and then perform the XADDPAIR operation to create the pairs again.

NOTE: If the ANTA5107E (RC=9014, REAS=604, or REAS=608) console message is displayed

during the XADDPAIR operation, the HXRC PP option may not have been installed. Verify that the HXRC PP

option is installed and if not, install the HXRC PP option.

NOTE: The HXRC option is only required for the 2105 CU emulation type. You can use HXRC for the

3990 controller emulation type without enabling the HXRC option.

If you use HXRC with FICON®, carefully set the path configuration. Refer to the following table.

Table 2 HXRC path configuration with FICON

Application Site Path

(System - DKC)

Record Set Transfer Path

(System Data Mover - DKC)

For Use

ESCON ESCON No

ESCON FICON Supported

FICON ESCON Not Recommended

FICON FICON Supported