User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
Inquiry (12h)
Quantum DX-Series Software Interface Guide 125
Table 79 INQUIRY
Command Descriptor
Block - Field
Descriptions
Field Description
EVPD Enable Vital Product Data. If 0, the drive returns the
Standard Inquiry Data page. If 1, the drive returns the
Vital Product Data page specified in Page Code.
Page Code Specifies which Vital Product Data page is to be
returned by the drive. This field must be 0 if EVPD is
0. A
CHECK CONDITION with ILLEGAL REQUEST
status is returned if this field specifies an unsupported
page code. Table 80
lists the page codes for the Vital
Product Pages supported by the drive.
Allocation
Length
Specifies the number of bytes of inquiry information
the drive is allowed to return to the initiator during
the command's DATA IN phase. Error status is not
returned if the value in this field truncates the
requested information.
Flag Bit The Flag bit is used in conjunction with the Link bit to
notify the initiator in an expedient manner that a
command has been completed.
Flag bits are not supported by the DX-Series system.
Link Bit A Link bit set to 1 indicates that the initiator requests
continuation of a task (an I/O process) across two or
more SCSI commands.
If the Link bit is 1 and the Flag bit is 0, and the task
completes successfully, the drive continues the task
and returns a status of
INTERMEDIATE and a LINKED
COMMAND COMPLETE message.
If the Link bit and the Flag bit within a Control word
are both set to 1, and the drive completes a command
with a status of
INTERMEDIATE, the drive returns a
LINKED COMMAND COMPLETE message (with Flag).
Link bits are not supported by the DX-Series system.