HP NonStop G-Series - Manual (Page 64)

Switchovers
ServerNet Nomadic Disk (Release 2) User’s Guide — 523968-001
5 -4
Moving the Fiber Optic Switches to the Opposite
Position
Moving the Fiber Optic Switches to the
Opposite Position
A switch card determines the position of the fiber-optic switch: straight or crossed. To
move the fiber-optic switches to another position, do one of the following:
•
If you are using Nomadic Disk Manager, the GIVE and TAKE commands perform
the switching. See
Section 7, Nomadic Disk Manager Interface .
•
If you are not using Nomadic Disk Manager:
•
Issue commands from the Switch Command Interface (SWCI) to each switch.
See
Section 6, Switch Command Interface (SWCI) . The SWCI commands
affect the switch card only if the key switch on the switch controller card is set
to the REMOTE position.
•
Physically move the toggle switches. The toggle switches affect the switch card
only if the key switch on the switch controller card is set to the LOCAL position.
Planned Switchovers
You perform a planned switchover to continue operations on the backup node when
the primary node must be halted to perform significant maintenance tasks or software
upgrades, minimizing down time for the users of the primary node.
The following procedure is an example of a planned switchover from primary node to
backup node.
Example 5-2. NDCONFIG on \BCK
SET PATH P $SMPRI.#A 1 CROSSED
SET PATH B $SMPRI.#A 2 CROSSED
SET PATH M $SMBCK.#A 1 STRAIGHT
SET PATH MB $SMBCK.#A 2 STRAIGHT
SET VOL $DATA01
SET VOL $DATA02
SET VOL $DATA03
SET VOL $DATA04
SET VOL $DATA05
SET VOL $DATA06
SET VOL $DATA07
SET VOL $DATA08
SET VOL $DATA09
SET VOL $DATA10
SET VOL $DATA11
SET VOL $DATA12
SET VOL $DATA13
SET VOL $DATA14
SET VOL $DATA15
SET VOL $DATA16
ADD SEGMENT SEGMENT-1, DATA