External SCSI-2 devices connect to your system through the built-in single-ended Fast/Wide SCSI-2 port on I/O+ boards (except for the board in slot 1), or through FSBE/S, DSBE/S, SWIS/S, or DWIS/S SBus cards installed on I/O+ boards.
The onboard SCSI-2 bus on the I/O+ board in slot 1 controls internal media tray devices. Therefore, the external SCSI connector on the I/O+ board in slot 1 must always have a terminator installed.
The maximum combined length for a string of SCSI cables is 6 meters for non-differential cables. For differential SCSI cables, the maximum is 25 meters. When calculating the total length of a SCSI string, include external cables, internal cables, and printed traces. Table 2-2 lists internal measurements for the Enterprise servers.
Location |
Internal Length |
Comments |
---|---|---|
Enterprise 6500 slot 1 |
3.7 meters |
Includes I/O+ board traces and cables to media tray |
Enterprise 5500 slot 1 |
3.7 meters |
Includes I/O+ board traces and cables to media tray |
Enterprise 4500 slot 1 |
1.4 meters |
Includes I/O+ board traces and cables to media tray |
SBus+ I/O board |
0.43 meter |
Includes board traces only |
Graphics+ I/O board |
0.43 meter |
Includes board traces only |
Disk board |
0.64 meter |
Includes board traces only |
For information on device addressing, priorities, and slot assignments, refer to Appendix D, "Rules for System Configuration in the Sun Enterprise 6500/5500/4500 Systems Reference Manual, part number 805-2632.
Risk of equipment damage. Do not assign the same SCSI address to two devices sharing the same SCSI bus or SBus card.
To connect an external SCSI device to your system:
Connect a SCSI cable to the appropriate SCSI-2 host on the I/O+ board.
For the I/O+ board in slot 1, use an SBus card. The onboard SCSI-2 port is reserved for the cable to the media tray.
For I/O+ boards in slots 2 through 15, use the onboard SCSI-2 port (Figure 2-11) or an SBus card.
For Enterprise 6500/5500 systems only: route the cable from the I/O+ board down along the left mounting rail inside the cabinet.
Use tie wraps to secure the cable to the left mounting rail.
Connect the other end of the SCSI cable to the external SCSI-2 device.
For Enterprise 6500/5500 systems only: replace the rear door and kick panel.
This concludes the hardware installation for the standalone server. You can now power on the system and test the server.