Replacing SA7x FRUs
7.7 Remote OCP Cable Removal and Installation
10. Perform the checkout and power-up procedures explained in Section 7.10.
7.8 Power Harness Removal and Installation
The power harness distributes power throughout the enclosure. If a power
problem is diagnosed as a faulty power cable, the entire power harness must be
replaced. All power cables are considered part of the power harness.
The power harness cable is routed from the power supply connector on the bottom
of the frame, through holes in the frame, to the top of the enclosure. As the
harness is routed up the sides of the frame, power cables for each disk drive
branch off the harness.
7.8.1 Removing a Power Harness
Use the following procedure to remove the power harness from the SA7x
enclosure.
1. Take all of the drives in the enclosure off line and release the Run switches to
spin down the drives. Wait until all Ready lamps are off. (See Section 4.4.)
2. Remove power to the enclosure by turning off the Master On/Off switch and
disconnecting the power cord. (See the appropriate storage array guide for
complete information about how the enclosure power supply power cord is
routed through the cabinet and connects to the cabinet power controller.)
3. Remove the front and rear enclosure covers. For each cover, loosen the two
mounting screws (located in the upper corners of the cover), then lift the cover
up and outward to clear the enclosure.
4. Disconnect the storage array SDI interface cables from the rear bulkhead of
the enclosure. (Refer to Figure 7–3.)
5. If the cabinet has a cabinet stabilizer foot installed, extend it. (Refer to
Figure 7–2.)
6. Remove the OCP. (See Section 7.3.)
7. Remove the power supply. (See Section 7.2.)
8. Remove all disk drives. (See Chapter 6.)
9. Loosen the four mounting screws (located at each corner of the enclosure) and
slide the enclosure frame partially out of the cabinet.
WARNING
Be careful when pulling out the enclosure frame for access to its internal
components. A stop mechanism in the chassis locks the frame at a point
that allows access to the transition boards and the fan assembly. This
stop mechanism locks the chassis so that the frame is three-quarters of
the way out of the chassis. If you release this stop, nothing prevents the
frame from being pulled completely free of the chassis.
10. Double check the enclosure to verify there is nothing to prevent the frame
from being pulled out further. Reach into the chassis and release the chassis
latch. (It may be necessary to push the frame back in about a quarter inch
for the latch to release.)
Replacing SA7x FRUs 7–15
