DEC AlphaServer 1000A Owner's Manual page 139

1. One end of the internal 50-pin SCSI cable (17-04233-01) connects to its system
board connector.
2. The CDROM drive connector on the SCSI cable connects to the rear of the
CDROM drive.
3. The remainder of the cable connects to the rear of the tape drive, if one is
installed, and the A bus is terminated by an external SCSI terminator (12-41667-
05) at the rear of the system unit. (See Figure 6-6.)
4. One end of a 68-pin internal SCSI cable (17-04022-01) connects to the 68-pin
connector on the option card, and the remainder of the cable passes beneath the
system board and connects to the 68-pin connector (J17) at the bottom of the
StorageWorks backplane.
5. A jumper cable (17-04021-01) connects the 68-pin connectors (J11 and J16) in
the center of the backplane. This connection enables the upper four and the
bottom three drives to be united on the B bus.
6. Jumper W1 in the J3 set of jumper pins on the backplane is installed, and the W2
and W3 jumpers are removed.
7. An internal terminator (12-45490-01) attached to the 68-pin connector (J10)
terminates the B bus.
AlphaServer 1000A Owner's Guide Configuring 6-31