User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Read Element Status (B8h)
54 Quantum DX-Series Software Interface Guide
Read Element Status (B8h) 2
The host can determine the status of any DX-Series system element by
issuing a Read Element Status command. The command can specify the
element type:
• Medium Transfer
•Storage
• Import/Export
• Data Transfer
• Starting Address
• Number of elements for which status information is to be returned
The DX-Series system automatically updates its internal element status
every time the status changes. The DX-Series system inventory initializes
the information and it is updated with each move. Because the
information is updated with each move, no action is required by the DX-
Series system other than returning the information it has stored.
The format for the Read Element Status command block is shown in
table 39.
Table 39 Read
Element Status
Command
Tech Tip: The DX-Series system does not support import/
export.
Bit/Byte 7 6 5 4 3 2 1 0
0
Operation Code (B8h)
1
Logical Unit Number VolTag Element Type Code
2
(MSB)
Starting Element Address
3
(LSB)
4
(MSB)
Number of Elements
5
(LSB)