SCSI Commands
Quantum DLT 4000 Tape Drive
5-17
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 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.
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (12h)
1
Logical Unit Number
Reserved
EVPD
2
Page Code
3
Reserved
4
Allocation Length
5
Unused
Reserved
Flag
Link
Figure 5–4 INQUIRY Command Descriptor Block - Data Format
Summary of Contents for DLTtape DLT 4000
Page 1: ...DLT 4000 Tape Drive Product Manual November 10 2003 81 60043 04 ...
Page 5: ...USER MANUAL STATEMENTS FOR CLASS B EQUIPMENT continued ...
Page 6: ......
Page 24: ...About This Manual Quantum DLT 4000 Tape Drive xxiv ...
Page 62: ...Hardware Implementation 2 28 Quantum DLT 4000 Tape Drive ...
Page 100: ...Messages 4 12 Quantum DLT 4000 Tape Drive ...
Page 264: ...SCSI Commands 5 164 Quantum DLT 4000 Tape Drive ...
Page 274: ...Appendix B EEPROM Resident Bugcheck and Event Logs B 6 Quantum DLT 4000 Tape System ...
Page 280: ...Appendix C Updating the Firmware C 6 Quantum DLT 4000 Tape Drive ...
Page 298: ...Index Index 6 Quantum DLT4000 Tape Drive ...
Page 299: ......