A P P E N D I X A |
Ultra320 SCSI Configuration |
This appendix provides general information about Ultra320 SCSI configuration rules. This appendix discusses the following topics:
For Ultra320 SCSI performance of up to 320 Mbytes/sec, there can be a maximum of 15 devices connected to each port on the host adapter.
The available target addresses (SCSI IDs) for each port on the host adapter are 0 through F.
The maximum SCSI bus length is determined by the SCSI bus type (that is, the number of devices connected).
TABLE A-1 shows the maximum SCSI bus lengths for Ultra320 SCSI with an 8/16-bit bus width.
Max Length (Meters)[1] |
Max Length (Meters)* |
||||
---|---|---|---|---|---|
|
|||||
In order to maintain Ultra320 SCSI performance, all cables used must be Ultra320 SCSI compliant. In addition, the SCSI bus must be correctly terminated. Most Sun devices use auto-termination. For more information, see the documentation that came with the device.
This host adapter has active terminators with an automatic means of enabling and disabling the termination. The termination circuit derives its power from the PCI or SCSI bus. When the PCI bus power is removed, active SCSI termination is maintained if the other SCSI device supplies power to the Term Pwr pins of the SCSI bus.
One of the four following symbols is placed near a SCSI port to indicate which type of SCSI the port is using. The icon might appear alone or with descriptive text.