User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
Inquiry (12h)
124 Quantum DX-Series Software Interface Guide
Inquiry (12h) 3
The INQUIRY command allows the initiator to determine the kind of SCSI
devices attached to its SCSI Bus. It causes a device that is attached to a
SCSI Bus to return information about itself. The drive identifies itself as a
Direct Access Storage Device that implements the SCSI-2 protocol. The
drive does not need to access its tape medium to respond to the inquiry.
The drive can provide two categories of data in response to an INQUIRY
command: Standard Inquiry Data and Vital Product Data. Standard
Inquiry Data contains basic data about the drive, and Vital Product Data
comprises several pages of additional data. Each Vital Product Data page
requires a separate
INQUIRY command from the initiator.
An INQUIRY command is not affected by, nor does it clear, a Unit
Attention condition.
Table 78 INQUIRY
Command Descriptor
Block - Data Format
Bit/Byte 7 6 5 4 3 2 1 0
0
1
2
3
4
5
Operation Code (12h)
Logical Unit Number Reserved
EVPD
Page Code
Reserved
Allocation Length
Unused
Reserved
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