IBM iSeries 270 Service Manual page 554

book.)
Note: Do not IPL the system to get to DST.
b. From the Service Tools display, select Work with disk units—>Work with disk unit
recovery—>Rebuild disk unit data.
Does the resource name of the disk unit you just exchanged appear on the display as a unit that can
be rebuilt?
v Yes: Continue with the next step.
v No: It can take up to five minutes for the input/output processor (IOP) to report the device to the
system. Keep trying the Rebuild Disk Unit Data option until the device is available. If the Rebuild
Disk Unit Data Failed display continues to appear even after 5 minutes, try a different disk unit or
ask your next level of support for assistance.
3. Perform the following:
a. Select the disk unit on the display with the resource name of the disk unit you just exchanged.
b. Rebuild the disk unit data. When the new disk unit is rebuilt, the display will show that the status is
complete (this may take 30 minutes or longer).
Note: Once the rebuild has started, it is not necessary to wait to verify the array rebuild completes
successfully.
c. Return to the procedure that sent you here.
This ends the procedure.
4. Exchange the failing disk unit. (See "Remove and replace procedures" on page 2.)
5. Perform the following:
a. Ask the customer to stop all active applications on the system and power the system off with the
Power Down System (PWRDWNSYS) command.
b. Perform an IPL to DST. (See Performing an IPL to DST in the iSeries Service Functions
book.)
c. From the Service Tools display, select Work with disk units—>Work with disk unit
recovery—>Rebuild disk unit data.
d. Select the disk unit on the display that was installed in place of the failing disk unit.
e. Rebuild the disk unit data. When the new disk unit is rebuilt, the display shows that the status is
complete (this may take 30 minutes or longer).
f. After verifying that the status is complete, press Enter.
6. Perform the following:
a. Return to the Use Dedicated Service Tools (DST) display.
b. Select Perform an IPL to complete the IPL.
c. Return to the procedure that sent you here.
This ends the procedure.
Exchange a disk unit with mirrored protection: For use by authorized service providers.
Definitions:
v Local load source: A disk used as the source for IPL data.
Primary partition:
– For system models 270 and 820, this disk unit must be located in position D01, D02, D03, or D04.
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Hardware (Remove and Replace; Part Locations and Listings)