IBM i 830 Repair Manual page 657

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Go to "Recovery Procedures" on page 893.
2. After you have determined the location of the disk unit to replace, remove the
front covers for access (see "FC 5075 – Covers" on page 641).
3. Remove the EMC access plate that is over the location of the disk unit that you
are removing. For location information, see "Locations — FC 5075 I/O Tower"
on page 740.
4. To remove a disk unit using concurrent maintenance perform the following:
a. Select System Service Tools (SST). If you cannot get to SST, select DST.
Do not perform a system IPL to get to DST.
b. Select the Start a Service Tool option.
c. Select the Hardware Service Manager option.
d. Select Device Concurrent Maintenance and enter the required information in
the information fields.
e. Press the Enter key on the console. After the delay time, the light above the
device location will begin flashing. You now have 9 seconds to pinch the
two surfaces of the latching mechanism together and rotate the handle of
the disk unit towards you. Pull the disk unit partially out of the tower.
Attention: If you remove the device when the light is not flashing, data
may be lost, the disk unit may be damaged, or the backplane may be
damaged.
Note: The light above the device location will go off and remain off as soon
as the device is no longer making contact with the backplane.
Wait another 5 seconds to allow time for the disk to stop spinning. Then
pull the disk unit the remaining way out of the tower.
Remove and Replace Procedures
Chapter 4. Removal and Installation Procedures
643