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SCSI-1 bus width?
8-bit
SCSI-1 bus speed?
5 MHz
Major downfall of SCSI-1?
Lack of compatibility, had to buy controller and devices from same manufacturer.
SCSI-2 benefits over SCSI-1?
Standardized connectors, bus widths, and bus speeds.
SCSI-2 (Regular) bus width?
8-bit
SCSI-2 (Regular) bus speed?
5 MHz
SCSI-2 (Wide) bus width?
16-bit
SCSI-2 (Wide) bus speed?
5 MHz
SCSI-2 (Fast) bus width?
8-bit
SCSI-2 (Fast) bus speed?
10 MHz
SCSI-2 (Fast-Wide) bus width?
16-bit
SCSI-2 (Fast-Wide) bus speed?
10 MHz
Single-ended maximum length for SCSI-2 devices?
6 meters
Differential maximum length for SCSI-2 devices?
25 meters
Can single-ended and differential devices be mixed?
No, they will smoke/burn.
What is the main difference between differential and single-ended signaling?
Differential uses 2 wires per data bit and single-ended uses 1 wire per data bit.
How many devices including the controller does SCSI-1 support?
8
How many devices including the controller does SCSI-2 support?
8
How many devices does SCSI-3 support including the controller?
Up to 16
Ultra SCSI bus speed?
20 MHz
Ultra SCSI bus width?
8-bit
Ultra SCSI Single-ended maximum length?
1.5 meters
Ultra SCSI Differential maximum length?
25 meters
Wide Ultra SCSI bus speed?
20 MHz
Wide Ultra SCSI bus width?
16-bit
Wide Ultra SCSI maximum length?
25 meters
Ultra2 SCSI bus speed?
40 MHz
Ultra2 SCSI bus width?
8-bit
Ultra2 SCSI maximum length?
25 meters
Wide Ultra2 SCSI bus speed?
40 MHz
Wide Ultra2 SCSI bus width?
16-bit
Wide Ultra2 SCSI maximum length?
25 meters
Ultra3 SCSI bus speed?
80 MHz
Ultra3 SCSI bus width?
8-bit
Ultra3 SCSI maximum length?
12 meters
Wide Ultra3 SCSI bus speed?
80 MHz
Wide Ultra3 SCSI bus width?
16-bit
Wide Ultra3 SCSI maximum length?
12 meters
What does a LUN do for SCSI devices?
Makes it so that multiple SCSI devices can use the same SCSI ID. Such as a hard drive array.
Author
jackdaniels2007
ID
49242
Card Set
SCSI Devices
Description
The specifications of SCSI devices for the A+ Certification Exam from the video.l
Updated
2010-11-13T16:37:57Z
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