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Chapter 5 ATAPI Interface
Page 40 STT8000A Product Manual
Inquiry command
Bit
Byte
76543210
0 Operation code (12h)
1 Reserved
2 Reserved
3 Reserved
4-7 Allocation Length
8-15 Vendor ID (8 ASCII characters) ASCII “Seagate “
16-31 Product ID (16 ASCII characters ASCII “STT8000A “
The INQUIRY command is always accepted, regardless of the state of the DSC bit.
The command does not modify the status of DSC. The INQUIRY command returns
the lesser of 36 bytes or the Allocation Length parameter of information. The
following table defines the returned values.
Note:
Much of the information returned by this command is redundant with the
ATAPI Identify Device command response.
Byte Description Value Meaning
0
Peripheral Device Type 01h Streaming Tape Drive (QIC-
121 Architectural Model)
1
Removable Media Bit (RMB) 80h Removable
2
ISO/ECMA/ANSI Version 02h ANSI=02
3
Response Data Format 02h This Format
4
Additional Length 32. 36 total bytes
5-7
Reserved 00h —
8-15
Vendor ID (8 ASCII characters) ASCII "Seagate "
16-31
Product ID (16 ASCII characters) ASCII "STT8000A "
32-35
Product Revision (4 ASCII characters) ASCII "N.NN"
The INQUIRY command is not to be used by the low-level driver; rather, it is
intended to be used by applications, which usually have access to the drive only
through the ATAPI protocol.