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SDLT 600 SCSI Interface Guide Chapter 4: SCSI Commands
81-81200-02 REV A01 January 2005 4-113
4.10.3 MODE SENSE Mode Pages
The following figure depicts the variable-length page descriptor.
Figure 4-63. MODE SENSE Page — Data Format
Descriptions of the MODE SENSE page descriptor fields are provided in Table 4-63. Detailed
descriptions of each of the MODE SENSE pages follow.
Page codes and supported pages are:
Bit
Byte
7 6 5 4 3 2 1 0
0 PS SPF (0) Page Code
1 Page Length
2 – n Mode Parameters
Table 4-63. MODE SENSE Page — Field Descriptions
Field Name Description
PS Parameters Savable. Not supported. Always set to 0.
SPF SubPage Format. Always set to 0. Indicates that the drive uses the page_0 page
format.
Page Code Refer to Table 4-64, next, for a complete list of supported page codes.
Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1. The length
is returned on MODE SENSE and must subsequently be set to the same value
when performing MODE SELECT.
Mode
Parameters
Contains the mode parameters for each mode page. The mode parameters are
described in the remaining sections of this chapter.
Table 4-64. Supported MODE SENSE Block Pages and Page Codes
Page Code Description SENSE / SELECT Refer to
00h No Requested Page SENSE ---
01h Read / Write Error Recovery Page BOTH Page 4-114
02h Disconnect / Reconnect Page BOTH Page 4-116
0Ah Control Mode Page BOTH Page 4-118
0Fh Data Compression Page BOTH Page 4-120
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