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Page 66
Mode Sense Data
Mode Parameter Header
6-Byte CDB Mode Parameter Header
Field
Bytes
Bits
PC
2
6-7
Page
2
0-5
Code
Allocation
7-8
Length
Reserved
Control
The Mode Sense data list, for both the 6-byte CDB and 10-byte CDB versions is in
the following general format:
Mode Parameter Header
Block Descriptor
Mode Parameter Pages
Bits
Byte
7
6
0
1
2
WP
Buffered Mode
3
Description
Page Control specifies the type of values to be returned.
00b = Report current values.
01b = Report changeable values. Any bit that can be changed by
Mode Select is set to 1; otherwise, the bits are set to 0.
10b = Report default values. Returns the power-up, or reset, values.
11b = Report saved values. Returns the power-up, or reset, values.
76b = Unit
The Page Code selects the page or pages to be returned by the
drive.
00h = Return only the Parameter List Header/Block Descriptor
02h = Return the Disconnect/Reconnect Page
0Ah = Return the Control Mode Page
0Fh = Return the Data Compression Control Page
10h = Return the Device Configuration Page
1Ch = Return the Information Exceptions Page
21h = Return the Drive Capabilities Page
22h = Return the Interface Control Page
3Fh = Return all available pages in ascending order starting from
page 02h
Specifies the number of bytes the host has allocated for returned
Mode Sense data. The drive will not return more than this amount of
data. A value of 0 is a valid entry and indicates no data.
All reserved bits must be 0.
See Control Byte Format on page 18.
The Mode Parameter Header is always returned.
The Block Descriptor is returned if DBD is 0 in
the Mode Sense CDB.
One or all Mode Parameter Pages may be
returned depending on the value of Page Code in
the Mode Sense CDB.
5
4
3
Mode Data Length
Medium Type
Speed
Block Descriptor Length
LTO SCSI Interface Manual
2
1
0
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