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

Using PPRC Commands for TrueCopy for z/OS A-9

Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide

CESTPATH

The CESTPATH command allows you to establish remote copy paths for the

USP V and can be used for either serial (ESCON) or fibre-channel interface.

However, the ESCON cable connection is not supported for the USP V. For

fibre, the RCU controller ID is specified. The syntax for the CESTPATH

command (ESCON Interface) is:

For 3990-6 and -6E controller emulations:

CESTPAT

DEVN(X’dev#’) PRIM(X’ssid’ serial#) SEC(X’ssid’ serial#’) LINK(X’aabbccdd’)

For 2105 and 2107 controller emulation (‘lss’ parameter for LCU no., CGROUP

and RESETHP options):

CESTPAT

DEVN(X’dev#’) PRIM(X’ssid’ serial# X’lss’) SEC(X’ssid’ serial#’ X’lss’)

LINK(X’aabbccdd’)

[CGROUP(YES|NO) RESETHP(YES|NO)]

Note: For fibre, do not use the RESETHP option. For serial, the RESETHP

option rejects host I/O operations. Before you use this option, stop the I/O

operations from the host.

Note: For 2105 or 2107 emulation, use the CESTPATH CGROUP option to

control freeze. Do not use the SVP RCU FREEZE option (Mode 104) or the

FREEZE option in CESTPATH LINK parameter. If you use the FREEZE option,

the CESTPATH command will be rejected.

Caution: Before issuing the CESTPATH command, you must make sure that

the relevant paths are offline from the host(s) (e.g., configure the Chipid

offline, or deactivate the LPAR, or block the port in the ESCD). If any active

paths still exist, the add path operation will fail because the port mode cannot

be changed.

Note: For fibre-channel interface, do not use the CESTPATH and CDELPATH

commands at the same time as the SCSI path definition function of LUN

Manager. The fibre-channel interface ports need to be configured as initiator

ports or RCU target ports before the CESTPATH and CDELPATH commands are

issued.

Table A- 3 describes the CESTPATH LINK parameter for fibre-channel

interface.