Fibre Channel ServerNet Adapter Installation and Support Guide (G06.28+, H06.03+)

Replacing an FCSA
Fibre Channel ServerNet Adapter Installation and Support Guide—528254-012
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Switch the Paths to Another FCSA
Switch the Paths to Another FCSA
Issue the SWITCH ADAPTER, AWAY command to move all the devices’ active paths
to an alternate path. (For more information about the SWITCH ADAPTER command,
see the SCF Reference Manual for the Storage Subsystem.)
->SWITCH ADAPTER $ZZSTO.#FCSA.GRP-11.MOD-2.SLOT-1 , AWAY
This command moves the paths to their alternates and warns you if a path cannot be
switched. If any of the paths do not have a functioning alternate, you receive an event
message. You can also perform a STATUS ADAPTER DETAIL command again to see
if any paths did not switch. All the DISK objects in the Configured Devices section of
the output should show inactive (no asterisk). If any DISK object is active, the path did
not successfully switch, which means something is wrong with its alternate path.
Stop the Devices That Are Using the Adapter
You can stop the disks one at a time by issuing SCF STOP DISK commands or all at
once by using the SWITCH ADAPTER, AWAY, FORCED command. The latter is more
convenient when you are stopping several devices.
These examples show the STOP DISK method:
-> STOP DISK $DS101-P
-> STOP DISK $DS109-P
-> STOP DISK $DS106-B
-> STOP DISK $DS108-P
-> STOP DISK $DS110-P
This example shows the SWITCH ADAPTER method:
->SWITCH ADAPTER $ZZSTO.#FCSA.GRP-11.MOD-2.SLOT-1 , AWAY,
FORCED
Label the Fibre Channel Cables
Check that the cables are correctly labeled. If not, label them using the procedure in
Label the Cables on page 2-13.
Caution. If one of the paths does not switch, fix the alternate path or else prepare to lose that
disk drive.
Caution. The SWITCH ADAPTER AWAY FORCED command switches the paths and then
stops all the paths regardless of whether the alternate paths are working.