User's Guide

Chapter 1 Theory of Operation
Operational Sequences
8 Quantum DX-Series Software Interface Guide
Off-Line 1
Changing the DX-Series system status to Off-line through the web GUI
causes the DX-Series system to go off-line. When a DX-Series system is
placed off-line, this sequence is performed:
1 The local controller for the DX-Series system completes any currently
processing command.
2 When all commands are complete, the web GUI displays System
Off-Line.
3 The DX-Series system generates a Unit Standby Button Was
Pressed event (SK=6 ASC=80 ASCQ=09).
When the DX-Series system is off-line it responds to these commands:
• Inquiry
• Request Sense
•Log Sense
•Mode Sense
• Check condition is set for all other commands and Unit Is Turned
Off-Line (SK=2 ASC=80 ASCQ=09) is set in the sense data
The DX-Series system remains off-line until one of the other operational
sequences occur.
Typical
Application
Enhancements
1
For optimum system performance, please note:
• Direct the host to check for any attention or error conditions the tape
DX-Series system may have buffered by issuing Request Sense
commands until “no sense data available” exists.
• The internal software does not support command queueing. It is up
to the host application to queue commands to the unit. It may be
advantageous for the application to group queued commands to
require the least amount of actuator motion.