Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

Configuring a Data Replication Manager Solution 4–29
1. Disable access on all units with this command:
SET Unit DISABLE_ACCESS_PATH=ALL
NOTE: Be sure to issue this command for all units.
2. Verify that the access on each unit is set to none by using the following CLI command:
SHOW UNITS FULL
The display will be similar to the following:
LUN Uses Used by
------------------------------------------------------------------------------
D10 DISK1000
LUN ID: nnnn-nnnn-nnnn-nnnn-nnnn-nnnn-nnnn-nnnn
NOIDENTIFIER
Switches:
RUN NOWRITE_PROTECT READ_CACHE
READAHEAD_CACHE WRITEBACK_CACHE
MAXIMUM_CACHED_TRANSFER_SIZE = 32
Access:
NONE
State:
ONLINE to this controller
Not reserved
NOPREFERRED_PATH
Size: nnnnnnnn blocks
Geometry (C/H/S): ( 7000 / 20 / 254 )
.
.
NOTE: For OpenVMS, all units must have an identifier set.
3. For OpenVMS, set device ID on all units with the following command:
SET UNIT IDENTIFIER = value
Example: SET D1 ID = 1
This becomes the VMS device ID for DGA1.
4. Distribute the units by setting their preferred path. Use either of the following CLI
commands:
SET Unit PREFERRED_PATH=THIS_CONTROLLER
SET Unit PREFERRED_PATH=OTHER_CONTROLLER
Keep the busiest units on different host ports.
5. Restart the controllers after configuring the units. Otherwise, the preferred path
settings will not go into effect.