Inquiry Command (12H); Figure 5-4 Inquiry Command Descriptor Block - Data Format - Quantum DLT 8000 Product Manual

5.4

INQUIRY Command (12h)

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 applicable interfacing protocol. The drive does not need to access its
storage 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.
Bit 7
Byte
0
1
2
3
4
5 Unused
Figure 5–4 INQUIRY Command Descriptor Block — Data Format
6 5
Operation Code (12h)
Reserved
Page Code or Operation Code
Allocation Length
Quantum DLT 8000 Tape System
4 3
Reserved
Reserved
SCSI Commands
2 1
CmdDt EVPD
Flag Link
0
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