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Inquiry Packet
7-55
7
Inquiry Packet
The inquiry command ($12) returns information from the controller that
identifies which controller is attached and its attributes. The format and the
number of bytes returned varies from controller to controller (refer to the
appropriate controller manual for this information).
The returned data is put in the specified address, and the length does not
exceed the data length provided; however, the actual length and content
information returned depends upon the controller.
The first table below shows the inquiry packet. The second table shows the
inquiry data return packet.
Even Byte \
Odd Byte \
$17 xxxxxxxx Vector number to use
upon return
$18 xxxxxxxx Status from SCSI
firmware (byte 2)
(Note 1)
$19 xxxxxxxx Status from SCSI
firmware (byte 3)
(Note 1)
$1A 00000000 00000000 Reserved
$1C xxxxxxxx xxxxxxxx Bytes per block
NOT
E:
1. Refer to Chapter 3.
2. Buffered writes are used to allow time for additional data to be transferred,
thus keeping the tape streaming. If non- buffered, controller returns status
only after all data has been written to the tape. If buffered, controller returns
a good status when all data has been transferred to the buffer, although all
data may not yet have been written to the tape.
3. Returned on Mode Sense.
FC B8 74 30