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Maxtor Atlas 10K V 5-65
5.14 MODE SENSE (6) Command (1Ah)
The MODE SENSE (6) command allows the initiator to read the drive's sector
descriptor and mode pages. The MODE SENSE Command Descriptor Sector is
shown in Table 5-89 and the data fields are described in Table 5-90. The Mode
Parameter Header is shown in Table 5-91 and the data fields are described in
Table 5-92.
Table 5-89 MODE SENSE (6) Command Descriptor Block-Data Format
Table 5-90 MODE SENSE Command-Field Descriptions
Table 5-91 Mode Parameter Header (6 Byte)-Data Format
Bit
Byte
765 4 3210
0 Operation Code (1Ah)
1 Reserved DBD Reserved
2 PC Page Code
3 Sub Page Code
4 Allocation Length
5 Control
Data Field Description
DBD
Disable Block Descriptor. When the value is 0, the drive returns its Block Descriptor
followed by the requested page(s). When the value is 1, the drive returns only the re-
quested pages.
PC
Page Control. Determines which type of page values are returned. These values are:
00b Current
01b Changeable
10b Default
11b Saved
Page Code
The Page Code field determines the pages to be returned to the initiator in the com-
mand's data-in buffer transfer. Refer to Table 5-49 and Table 5-93 for a complete list of
the Mode Pages (changeable and read-only). A Page Code of 3Fh causes all supported
pages to be returned.
Sub Page Code
The Sub Page Code field determines the sub pages to be returned to the initiator in the
command's data-in buffer transfer. A Sub Page Code of 0xFF causes all supported sub
pages to be returned.
Bit
Byte
7654321 0
0 Mode Data Length
1Medium Type
2 Device-Specific Parameter
3 Block Descriptor Length