Inquiry; Command Description; Command Descriptor Block; Table 9-1: Inquiry Command Descriptor Block - Tandberg Data SLR7-140 PROGRAMMER Manual

9.
BYTE BIT 7
00 Operation Code 12h
01 Logical Unit Number (LUN)
02 Page Code
03 RESERVED
04 Allocation Length
05 Control Byte
Table 9-1:
CmdDt
EVPD
Page Code

Inquiry

9.1.

Command Description

The INQUIRY command requests that information regarding
parameters of the Drive are to be sent to the Initiator.
The Parameter List is transferred during the DATA-IN
phase of the command.
The INQUIRY command will execute even if the Initiator
specifies an unsupported LUN
The INQUIRY command will execute normally even if a
reservation conflict exists.
The INQUIRY command
Attention condition is pending and the INQUIRY command
will not clear the Unit Attention condition.
The INQUIRY command will not check for Deferred Errors.
9.2.

Command Descriptor Block

6 5
INQUIRY Command Descriptor Block
The Command Supported Data (CmdDt) bit must be set to
zero.
An Enable Vital Product Data bit of one specifies that
the Drive will
specified by the Page Code field. An EVPD bit of zero
specifies that
INQUIRY data.
This field specifies which page of VPD information the
Drive will return. This field MUST be set to zero if the
EVPD bit is not set to one. Legal values are:
9-1 Tandberg SLR Product Line SCSI Functional Specifications
will execute
4 3
RESERVED
return the Vital
the Drive will
even if a
2 1
CmdDt EVPD
Product Data (VPD)
return the standard
Unit
0