v No: Go to Recovery procedures.
3.
After you have determined the location of the disk unit to replace, remove the front covers for access.
(See FC 5095, FC 0595 - Covers.)
4. Remove the EMC access plate that is over the location of the disk unit that you are removing. For
location information, see Locations — FC 5095, FC 0595 I/O tower.
5. 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 Start a Service Tool—>Hardware Service Manager.
c. Select Device Concurrent Maintenance and enter the required information in the information
fields.
d. Press Enter on the console. After the delay time, the light between the two DASD enclosures will
begin flashing (see Figure 2 (See page 196) below). You now have nine 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. The light between the two DASD enclosures will go off
and remain off as soon as the device is no longer making contact with the backplane.
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.
Figure 1. Removing FC 5095, FC 0595 - Disk unit (concurrent)
Wait another five seconds to allow time for the disk to stop spinning. Then pull the disk unit the
remaining way out of the tower.
6.
Are you finished with the repair?
v No: Continue with the next step.
v Yes: Replace the covers that were removed during this procedure and return to the procedure that
sent you here.
This
ends the procedure.
7. To install a disk unit using concurrent maintenance, perform the following:
a. Select System Service Tools (SST). If you cannot get to SST, select DST.
Analyze hardware problems 195
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