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Chapter 3 Media Changer Commands

Inquiry Command (12h)

Quantum ATL SuperLoader Software Interface Guide 33

Figure 8 Inquiry

Command

Standard Inquiry

Data Page

Figure 9

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 15

on page 43 and table 14 on page 43.

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 11

on page 39 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.

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