User's Guide

Chapter 2 Media Changer Commands
Inquiry Command (12h)
Quantum SuperLoader 3 Software Interface Guide 12
Figure 3 Inquiry Command
Standard Inquiry Data
Page 2
Figure 4 shows the format of the Standard Inquiry Data page returned by
the media changer.
Field Description
CmdDt
Command Support Data. If CmdDt =0 and EVPD (see below) = 0, the
media changer returns the
Standard Inquiry Data. If CmdDt =1 with
EVPD = 0, the media changer returns the Command Data specified by
Page Code/ Operation. Information about Command Support Data is
provided in figure 9
on page 19 and table 6 on page 20.
EVPD
Enable Vital Product Data. If EVPD =0 and CmdDt (see above) = 0, the
media changer returns the
Standard Inquiry Data. If EVPD =1 and
CmdDt = 0, the media changer returns the Vital Product Data Page
specified by
Page Code/Operation Code.
Page Code or
Operation Code
Specifies the
Vital Product Data Page which is to be returned by the
media changer when
EVPD is set. Specifies the SCSI Operation Code
for command support data to be returned by the media changer
when
CmdDt is set. A CHECK CONDITION status is returned if this field
specifies an unsupported
Page or Operation Code or if both EVPD and
CmdDt are set. Figure Figure 5 on page 16 shows the Page Codes for
the
Vital Product Pages supported by the media changer.
Allocation Length Specifies the number of bytes of inquiry information the media
changer 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.