Installation and Reference Guide HP StorageWorks Secure Path 3.0F Service Pack 4 for HP-UX 11i v1.0 and 11i v2.0 (5697-8001, March 2009)

5. Select two paths that you want to assign to the second target on the configuration map.
NOTE:
This assignment must allow each adapter to reach opposite controllers ( this and other ) through
opposite switches.
For example, in the previous table, select either !NEWCON13 and !NEWCON15, or !NEWCON14
and !NEWCON16..
6. Enter the following commands for the selected pair:
HSG80> set !newcon13 unit_offset=10
HSG80> set !newcon15 unit_offset=10
7. Initialize the LUNs that you want to define for the second target, using procedures described in
the HSG80 ACS Solution Software for HP-UX installation and configuration guide.
8. To view all LUNs, enter the following command:
HSG80> show devices
Up to 8 devices are displayed as used by units D0 through D7, and the new devices is displayed
as not used by assignment.
9. Add the new devices as units D10 through (or up to) D17. For example:
HSG80> add unit D10 M9
HSG80> add unit D11 DISK40300
Continue adding devices up to a maximum of D17.
The array now identifies units from D10 to D17 with a unit offset of 10, as a second target of
LUNs 0 to 7.
10. Enter the following command at the server console:
# ioscan –fn (to see the new units)
# insf –e (to install special files for each new unit)
An ioscan -fnk now shows all new LUNs. You can see these new LUNs only on half of the
original paths, and the old LUNs is seen on the other half of the original paths.
11. If you do not see all or part of the new LUNs following the ioscan, complete the procedure
described in What to do if ioscan does not see all paths to the array.
NOTE:
This irregularity results from HP-UX tables that are used by the OS to maintain accurate I/O system
persistence across reboots and is not a cause for concern.
Setting a preferred unit to a controller
In multiple-bus failover mode, you can specify units to be normally selected by a specific controller of
a controller pair. This process is called preferring and is useful in static load balancing.
Units can be preferred to one controller or the other by the preferred_path switch of the ADD
UNIT or SET UNIT command. You must use this option of preferring a unit to a controller if you
intend to use the preferred path feature in Secure Path.
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