User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands

Mode Sense (1Ah)

Quantum DX-Series Software Interface Guide 41

• Otherwise, the current setting for each parameter is always the

same as the setting that parameter had when the DX-Series

system was turned on

• Page Codes

The valid page codes are:

• 00h — Vendor Unique Page, length 44h

• 1Dh — Element Address Assignment Page, length 18h

• 1Eh — Transport Geometry Parameters Page, length 08h

• 1Fh — Device Capabilities Page, length 18h

• 20h — Vendor Unique Page, length 08h

• 3Fh — Return All Pages, length 74h

The parameter data returned for each Mode Sense command is preceded

by a Mode Parameter header block. The header block is then followed by

either the requested parameter page or all pages if the Return All Pages

page code was used.

The format for the Mode Sense header block is shown in table 31.

Table 31 Mode

Sense Data Header

Bit/Byte 7 6 5 4 3 2 1 0

• Mode Data Length

Field is set to the data amount following the Data Length field in

bytes. This includes the last 3 bytes in the header block as well as all

bytes in the parameter page or pages.

• Medium Type Code

Field is reserved for medium changer devices.

Mode Sense Data Length

Medium Type (00h)

Device-Specific Parameter (00h)

Block Descriptor Length (00h)