System information

Installing Hardware Options
MicroVAX 3100 Models 88/98 User Information
3-7
SCSI Addresses (SCSI ID’s)
Before installing a SCSI device, you must either set or verify the setting of the device’s
SCSI address (SCSI ID). The SCSI controller chip is normally assigned device ID seven.
Digital recommends that you use Table 3-1 as a guide for the selection of an address for
your SCSI drive.
Table 3-1 SCSI Address Recommendations
SCSI Address (ID) Device (Drive) Recommended
0 Expansion
1 Expansion/hard drive
2 Expansion/hard drive
3 System disk (where your operating system resides)
4 CD-ROM drive
5 Expansion
6 Host Adapter (SCSI Controller) default
7 Expansion
Refer to Appendix F, Setting SCSI Ids, and the section on SCSI Connectors in
Appendix E, Technical Specifications, for additional information.
________________________ CAUTION___________________________
Failure to properly set up the SCSI termination may result in loss of data or
damage to the file system.
____________________________________________________________
SCSI Termination
MicroVAX 3100 Model 88 and Model 98 Systems contain an embedded SCSI bus that is
used to connect both the internal and external drives. Both ends (and only at the ends) of
the SCSI bus MUST be terminated correctly. The controller end of the bus has embedded
termination.
External SCSI Connector Termination
An external terminator is required when the SCSI port is not being used.