HP XP P9500 Storage - Manual (Page 18)

Continuous Access Synchronous Z operations performed with PPRC
Using PPRC commands, you can perform the following operations:
•
Create, suspend, resynchronize, and delete Continuous Access Synchronous Z pairs
•
Suspend, resynchronize, and delete Continuous Access Synchronous Z consistency groups
•
Establish and delete data paths
•
View path and pair status
The following applies when using PPRC commands:
•
The P9500 is capable of automatically configuring a Fibre Channel port as an initiator or
RCU target port, if required, in response to the TSO CESTPATH and CDELPATH commands.
Initiator and RCU target ports are required for sending and receiving data to and from the
main and remote system. System option mode 114 must be enabled for automatic port
configuration in response to PPRC commands. Only HP Technical Support can set System
Option Modes.
◦ The P9500 makes sure that the main disk array port specified for an interconnecting link
is offline to a host, and automatically configures it as an initiator port if required. Similarly,
the corresponding remote disk array port is configured as an RCU target port when
required.
When the CDELPATH command is issued, Continuous Access Synchronous Z logical paths
are removed. If there are no more Continuous Access Synchronous Z logical paths on
the port, the port is automatically changed from initiator port to RCU target port.
◦ If the ports are in initiator/external mix mode, initiator ports do not automatically change
to RCU target ports, nor to RCU target ports automatically change to initiator ports, even
though system option mode 114 is enabled.
•
Relating to the Fibre Channel interface, do not use the CESTPATH and CDELPATH commands
when using LUN Manager’s SCSI path definition function. Fibre Channel ports must be
configured as initiator or RCU target ports before the CESTPATH and CDELPATH commands
are issued.
NOTE: Ensure that the relevant paths are offline before issuing the CESTPATH command.
The add path operation fails if active logical paths exist, because the port attribute cannot be
changed.
Continuous Access Synchronous Z options not supported with PPRC
The following Continuous Access Synchronous Z options cannot be changed using PPRC. Use
Remote Web Console to change these options.
•
RCU and CU options. The following default values are used for these options:
Minimum Paths = 1 ◦
◦ RIO MIH Time = 15 sec
18 Requirements and specifications