Specifications

ATAPI For Streaming Tape QIC-157 Rev B
45
Table 6-8 INQUIRY Data Format
Bit
Byte
7 6 5 4 3 2 1 0
0 Reserved (Peripheral Qualifier) Peripheral Device Type (01)
1 RMB Reserved
2 ISO Version ECMA Version ANSI Version (02)
3 Reserved
(AENC)
Reserved
(TrmIOP)
Reserved Response Data Format (02)
4 Additional Length (n-4)
5 Reserved
6 Reserved
7 Reserved
(RelAdr)
Reserved
(WBus32)
Reserved
(WBus16)
Reserved
(Sync)
Reserved
(Linked)
Reserved Reserved
(CmdQue)
Reserved
(SftRe)
8-15 Vendor Identification
16-31 Product Identification
32-35 Product Revision Level
36-55 Vendor-specific
56-95 Reserved
Reserved (Vendor Specific Parameters)
96
n
The Device-type field identifies the Device. It is defined in Table 6-9 Peripheral Device Types on page 45.
[Editor's Note: Due to hardware restrictions all pages should be padded to a multiple of 4 length.]
6.8.2.2. Using the INQUIRY Command
The INQUIRY command may be used by the Host to determine the configuration of the Device.
Devices respond with information that includes their type and Specification level and may include
the vendor’s identification, model number and other useful information.
Table 6-9 Peripheral Device Types
Code Description
00h Direct-access Device (e.g. magnetic disk)
01h Streaming Tape Device (QIC-121 Architectural Model)
02h - 04h Reserved
05h CD-ROM Device
06h Reserved
07h Optical memory Device (e.g. some optical disks)
08h - 1Eh Reserved
1Fh Unknown or no Device type
The Peripheral Device Type shall be set to 01h to indicate a Streaming Tape Device.
A Removable Medium Bit (RMB) of zero indicates that the medium is not removable. A RMB bit
of one indicates that the medium is removable. Streaming Tape Devices should always report
“Removable”.
The usage of non-zero code values in the ISO Version and ECMA Version fields are defined by
the International Organization for Standardization and the European Computer Manufacturers
Association, respectively.
The ANSI Version field must contain a 02h to comply with this version of this Specification.