Hp NonStop G-Series Manual de usuario descargar pdf (Pagina 59)

Switchovers

ServerNet Nomadic Disk User’s Guide—425485-001

5-5

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 is an example of a planned switchover from primary node to backup

node.

On Primary node \PRI

1. Stop all running applications.

2. Change the position of the switches

•

If you are not using the Nomadic Disk Manager:

a. Use the SCF STOP DISK command to stop all ServerNet Nomadic Disk

drives.

b. Change the fiber-optic switches at the primary node to the opposite position

as described in Moving the Fiber Optic Switches to the Opposite Position

page 5-4.

•

If you are using the Nomadic Disk Manager:

a. Read Section 7, Nomadic Disk Manager Interface

b. Notify Network Services to perform the network switchover to the backup

node, \BCK.

c. Log on as the super ID and start the Nomadic Disk Manager at a TACL

prompt.

> NOMADIC

d. Use the LISTOPENS command to verify there are no open files on the

Nomadic volumes (except the SAFE.GUARD file on each volume, if

Safeguard is being used).

1 ND> LISTOPENS, SEGMENT *

e. Use the GIVE command to prepare for planned switchover.

2 ND> GIVE DATA

This command toggles the appropriate switch cards, switching the volumes

to \BCK.

3. Stop \PRI.

4. Inform the operators located at the \BCK node that the Nomadic volumes are ready

for switchover.

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Hp NonStop G-Series Manual de usuario Pagina 59