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2–18 Configuring 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.