Inquiry (12H); Table 5: Inquiry Command - Quantum ACL 4/52 Supplementary Manual

ACL 4/52 Software Interface Guide
Document 6211225-03
Version 3.0
Table 5: Inquiry
Command
Bit/Byte 7
0
Logical Unit Number
1
2
3
4
5
Logical Unit Number
EVPD
Allocation Length
Page Code
3-12

Inquiry (12h)

The host uses the Inquiry Command to determine the devices attached
to the SCSI bus. Using this command, the host can request a
description from each device. The description provided by the library
identifies the type of device, manufacturer, and the nature of the
supported SCSI interface.
Only the standard Inquiry data format is supported.
The format for this command data block is shown in Table 5.
6 5 4
Operation Code (12h)
Page Code (00h)
Reserved (00h)
Allocation Length
Reserved (00h)
The Logical Unit Number must be set to 0. This field indicates
which logical unit the command should be sent to.
The Enable Vital Product Data (EVPD) bit should always be zero.
An EVPD bit of zero specifies that the target returns the Standard
Inquiry Data.
This field contains the maximum amount of data that may be
returned. Anything greater than 36 returns the full 36 bytes of data.
Vital Product Data Page Code. The ACL 4/52 returns only the
Standard Inquiry Data. This field is not used and must be set to 0.
The format for the Standard Inquiry Data block returned by the library
to the initiator is shown in Table 6.
3 2 1
Reserved
(0h)
0
EVPD
(0)
SCSI Interface