Table Of Scsi Terminology And Limitations - ADIC Scalar 1000 User Manual

The SCSI protocol also defines a priority-based arbitration method, based on
the target ID of the device attaching to the bus. The SCSI ID priority order is,
from highest to lowest, 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8.

Table of SCSI Terminology and Limitations

The following table (look for updates at http://www.scsita.org/) defines the
number of devices supported, based on the negotiated transfer type. When
reviewing the limitations of a bus, the capabilities of the fastest devices must be
considered. The bus length indicates total SCSI bus length, including any
internal device cables, rather than the length between any two devices.
Endorsed Terminology
for SCSI Parallel
Interface Technology
SCSI 1 (2)
Fast SCSI (2)
Fast Wide SCSI (2)
Ultra SCSI (2)
Ultra SCSI (2)
Wide Ultra SCSI
Wide Ultra SCSI
Wide Ultra SCSI
Ultra2 SCSI
Wide Ultra2 SCSI
Ultra3 SCSI or Ultra 160
Ultra320
26 Other Installation Issues
SNC 5100
Table 5: SCSI Trade Association Terminology
Max. Bus Speed,
5
10
20
20
20
40
40
40
40
(2,3)
80
(3)
160
(5)
320
Bus
Width,
MB/Sec
Bits
8
8
16
8
8
16
16
16
8
16
16
16
Max.
Bus
Lengths
Max.
,
Devices
in
Meters
(1)
LVD
25 8
25 8
25 16
25 8
- 4
25 16
- 8
- 4
25 8
25 16
(4) 16
(4) 16
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