Board Slot Selection

Logically there is no difference between the board slots 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 6500 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 are boards 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 Figure 5-6.

Other than the slot 1 exception, a Disk board can be placed in any of the numbered board slots in Enterprise 5500/4500 systems. Use only slot 14 and slot 15 in Enterprise 6500 systems, and you must use slot 15 if only one Disk board is installed.

For boards being placed in the rear of the system, ensure that the component side is up. If the boards are placed in the front of the system, ensure that the component side is down (Figure 5-7).

Figure 5-6 Enterprise 5500/4500 Board Locations