User's Guide

Chapter 2 Emulated Medium Changer SCSI Commands
Mode Sense (1Ah)
48 Quantum DX-Series Software Interface Guide
The XX→YY fields indicate if a transfer from an element of type XX is
possible to an element of type YY. A 1 in any of these fields indicates that
all Move Medium commands where the source element is type XX and
destination element is type YY are supported. A 0 in these fields indicates
the move may or may not be valid depending on the particular element
requested.
The DX-Series system does not support the Exchange Medium
command. Bytes 12 through 15 in this parameter page contain the
individual fields specifying the DX-Series system exchange capabilities.
Since the DX-Series system has no exchange capability, all of these fields
are 0.
The format for Mode Sense Vendor Unique Page 20h is shown in
table 36.
Table 36 Mode
Sense Data - Vendor
Unique Page 20h
Bit/Byte 7 6 5 4 3 2 1 0
0
1
2
Reserved (00h)
3
• PS-Parameters Savable
This bit is always set to 1 indicating that this page can be saved to
nonvolatile memory.
• Page Code
The page code value of 20h is used to indicate a vendor unique page,
in page format.
• Page Length
The page length is fixed at a value of 2 bytes.
• SER
This bit enables Drive Serialization, which enables reporting the
drive serial numbers in the Alternative Volume Tag (AVoltag) field
of the drive Read Element Status. The default setting is Enabled.
PS (1) Rsvd (0) Page Code (20h)
Page Length (02h)
SER
AC DLR
Reserved (00h) ADU EXB