5–14
SF3x Storage Enclosure FRU Replacement
5.1.3 Restoring the Disk ISE
Follow the steps in this section to bring a disk ISE back into service on its
DSSI bus.
CAUTION
Perform the following steps only after repairing or replacing a
disk ISE.
1. Apply power to the disk ISE with the drive dc power switch.
2. Press the Ready button to bring the disk ISE back on-line. This
step invokes the one-time HDA to drive module calibration that runs
nominally 5 to 8 minutes.
3. Restore the customer data to the repaired disk ISE by using the usual
BACKUP procedure.
NOTE
Following the replacement of a disk ISE, a one-time calibration
is performed that takes nominally 5 to 8 minutes, during which
time the disk ISE does not communicate with the host system.
The calibration sequence is complete when the Fault LED on
the OCP stops flashing and the Ready LED is on. Until this
time, this disk ISE is unavailable.
4. Find the node name of the replacement disk ISE, R2QSAA in this
example. Type the SHOW CLUSTER (Example 5–2) command at
the system console. If necessary, compare the list of node names you
recorded in Section 5.1.1 to find the new node name.
NOTE
The SHOW DEVICES command will
not
display the repaired
disk ISE at this time.
5. Invoke PARAMS in the unit by issuing the SET HOST/DUP command:
$ SET HOST/DUP/SERVER=MSCP$DUP/TASK=PARAMS nodename
6. Using PARAMS commands, check all parameters and set them to the
values previously recorded:
a. Use the SHOW command to read each parameter.
b. Use the SET command to change parameter values.
c. Use the WRITE command once all values have been set to match
the originals.
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