Compaq 18Configuring an HSZ80 Array Controller, SET Multibusfailover Copy = Thiscontroller

2–18Configuring an HSZ80 Array Controller

5.Put this controller in multiple-bus failover mode, using the following command:

CAUTION: Issuing the SET MULTIBUS_FAILOVER COPY command will overwrite data on the companion controller. If you are reconfiguring the controllers, see “CONFIGURATION RESET” in Chapter 5, “CLI Com- mands,” before proceeding and for more information.

SET MULTIBUS_FAILOVER COPY = THIS_CONTROLLER

The other controller inherits this controller’s configuration, then restarts. Wait for it to return to normal operation before continuing.

See “Selecting a Failover Mode,” page 2–29,for details about failover modes.

6.If you want to enable mirrored write-back cache in a failover configuration, enter this command:

SET THIS_CONTROLLER MIRRORED_CACHE

NOTE: Both controllers restart when you set mirror mode. This process can take up to 5 minutes, depending on the amount of data that must be flushed from the cache.

For details about caching techniques, see “Caching Techniques,” page 1–20.

For details about mirrored write-back cache, see “Enabling Mirrored Write-Back Cache,” page 2–31.

7.Set the SCSI target ID numbers for the controller. Use the following command:

SET THIS_CONTROLLER PORT_1_ID= (n,n)

or

SET THIS_CONTROLLER PORT_2_ID= (n,n)

See “Setting SCSI Target ID Numbers,” page 2–33,for details about valid SCSI target ID numbers.