5-8 UltraEnterprise 6000/5000/4000 Systems Manual—November 1996
5
5. If a board is not immediately replaced, a filler panel or a load board (for
Enterprise 6000 systems only) must be installed in its place.
See Section 5.2, “Filler Panels and Load Boards.”

5.5.1.2 Removing a Board froma Nonpowered On System

1. Use a Phillips #1 screwdriver to mechanically release the board from the
system card cage.
Insert the screwdriverinto each quarter-turn access slot (the slots are located
on the left and right sides of the board‘sfront panel) and then turn a quarter
turn so that the arrow points to the unlocked position. See Figure5-4 on
page 5-7.
2. Unfasten any cable connectors from the front panel and set them aside.
Label cables to identify them for reconnection later.
3. Pull the ends of both extraction levers outward simultaneously to unseat
the board from the centerplane receptacles.
See Figure5-5 on page 5-7.
5.5.2 Installing a Board

5.5.2.1 Board Slot Selection

Note – Logically there is no difference between the boardslots in the front or
rear of the card cage, and each slot can accept any board type. It is suggested
that CPU/Memory boards be installed in the front slots, and I/O and Disk
boards be installed in the rear slots because of cabling. Should the need arise,
however,any of these three board types can be placed in any of the numbered
board slots, with these exceptions:
Slot 1: Slot 1 should be used by the first I/O board because it is the only
slot connected to the onboard SCSI devices.
Slots 14 and 15: In Enterprise 6000 systems, Disk boards are supported
only in these two slots.
The first CPU/Memory board is placed in slot 0, followed sequentially by all
remaining even numbered slots. If there areboards remaining, they can be
installed sequentially in odd numbered slots, if available, in the system rear
(with the exception of slot 1 as noted above). See Figure5-6.