Table Of Scsi Terminology And Limitations - ADIC Scalar 100 User Manual
Quantum scalar 100: user guide
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Also See for Scalar 100:
- User manual (286 pages) ,
- Quick start manual (2 pages) ,
- Release note (2 pages)
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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.
Table 3-4: SCSI Trade Association Terminology
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
(4)
Ultra3 SCSI or Ultra
160
(6)
Ultra320
ADIC Gateway Setup
Max. Bus
Speed,
MBytes/
Sec
5
10
20
20
20
40
40
40
40
(2,4)
80
160
320
Max. Bus Lengths,
Bus Width,
in Meters (1)
Bits
SE
HVD
8
6
8
3
16
3
8
1.5
8
3
16
-
16
1.5
16
3
8
(4)
16
(4)
16
(4)
16
(4)
Max.
Devices
LVD
(3)
25
8
(3)
25
8
(3)
25
16
(3)
25
8
-
-
4
(3)
25
16
-
-
8
-
-
4
12
25
8
12
25
16
(5)
12
16
(5)
12
16
41
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