Quantum ATL SuperLoader ATL, User Manual

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Chapter 3 Media Changer Commands
Mode Sense (6) / (10) Command (1Ah/ 5Ah)
76 Quantum ATL SuperLoader Software Interface Guide
MODE SENSE may be either MODE SENSE (6) or MODE SENSE
(10). MODE SENSE (6) data contains a 4-byte header followed by
one 8-byte block descriptor, followed by zero or more variable
length pages, depending on the Page Code and Allocation Length.
Mode Sense Data
Headers
3
The MODE SENSE (6) and MODE SENSE (10) headers are
illustrated in the following figures.
10 Report Default Values
11 Report Saved Values
Note that the media changer device does not support saved values.
Page Code This field allows the host to select any specific page or all of the pages
supported by the media changer.
Page Code Description
1Ch TapeAlert Page (1Ch) on page 79 (LTO only)
1Dh Element Address Assignment Page on page 82
1Eh Transport Geometry Parameters Page on page 85
1Fh Device Capabilities Page on page 86
3Fh Return all pages
Allocation
Length
This field specifies the number of bytes that the host has allocated for
returned MODE SENSE data. An allocation length of zero indicates that the
media changer will return no MODE SENSE data. This is not considered an
error, and GOOD status is returned.
Field Name Description