Mode Sense (6)
96122 • Revision: F Chapter 6 SCSI Commands 129
Mode Sense (6) Data
The library returns the following mode sense data:
■ A four-byte Mode Parameter Header followed by
■ One mode page or all mode pages in the order specified in the Page Code list.
The mode pages available are those defined for medium changers in the Fibre
Channel standard, including:
■ “Fibre Channel Logical Unit Page” on page 130
■ “Low Voltage Differential SCSI Logical Unit Page” on page 131
■ “Fibre Channel Port Control Page” on page 132
■ “Low Voltage Differential SCSI Port Control Page” on page 133
■ “Informational Exceptions TapeAlert Control Page” on page 134
■ “Element Address Assignment Page Definition” on page 135
■ “Transport Geometry Mode Page Definition” on page 137
■ “Device Capabilities Page Definition” on page 138
■ Plus those defined for medium changers in the SCSI standard including a
SCSI Logical Unit Control page and a SCSI Port Control page.
■ The data can be truncated to the length specified in the allocation length field.
Mode Sense (6) Parameter Header Definition
The following table shows the Mode Sense Parameter Header page.
TABLE 6-36 Mode Sense (6) Parameter Header
Byte
Bit
76543210
0 Mode Data Length
1 Reserved
2 Reserved
3 Block Descriptor Length (00h)
Mode Sense (6) Parameter Header Page Definitions:
Mode Data Length This field indicates the number of bytes of parameter information available to
be transferred to the initiator, regardless of the allocation length. This field
excludes the Mode Data Length byte but includes three additional Mode
Parameter Header bytes and any mode pages that follow.
Block Descriptor Length The library does not support block descriptors (00h).
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