5.2 PPRC Hardware Requirements
The hardware requirements for both the primary and secondary RVAs to support PPRC are:
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RVA Model T82 Feature code 7001
(LIC level T04.05.xx is the minimum level) Remote Service capability
Note: We recommend that 4 GB of cache be installed on the RVAs to maximize performance. We also recommend four ESCON links between the two subsystems.
5.3 Invoking peer-to-peer remote copy
You initiate PPRC by using the ICKDSF PPRCOPY command with the options shown in Table 1.
Table 1. ICKDSF PPRCOPY Command Options
PPRCOPY | Function | Primary | Secondary |
Command |
| Site | Site |
Option |
|
|
|
|
|
|
|
ESTPATH | Establishes ESCON paths between the RVA of an application | Yes | No |
| (primary) site and a recovery (secondary) site. |
|
|
|
|
|
|
DELPATH | Deletes all established ESCON paths between primary and | Yes | No |
| secondary site RVA. |
|
|
|
|
|
|
ESTPAIR | Establishes a remote copy device pair. | Yes | No |
|
|
|
|
DELPAIR | Removes primary and secondary volumes from PPRC and | Yes | No |
| returns the devices to a simplex state. |
|
|
|
|
|
|
QUERY | Queries the status of a PPRC volume pair and the paths | Yes | Yes |
| associated with the RVA for the addressed device. |
|
|
|
|
|
|
RECOVER | Allows the recovery site system to regain control of a DASD | No | Yes |
| volume on its RVA. |
|
|
|
|
|
|
SUSPEND | Suspends PPRC operation between a primary and secondary | Yes | Yes |
| pair. |
|
|
|
|
|
|
Note: The ICKDSF PPRCOPY commands for the primary device are issued at the primary (application) site. Commands for the secondary device are issued at the secondary (recovery) site.
Note: The PPRCOPY QUERY VOLUME command should be used to display the subsystem identifier (SSID), serial number, and channel connection (logical) address (CCA) of a device. (The CONTROL CONFIGURE (DISPLAY) command does not work with the RVA. It works only with the 3990/9390 storage controls.)
For an example of using the PPRCOPY command, see 5.5, ªExamples of PPRCOPY Commandsº on page 36. For a more detailed description of the PPRCOPY command, see Device Support Facilities User′s Guide and Reference, Release 16 Refresh with
Chapter 5.