Dell PowerVault ML6000 - Manual (Page 46)

36 SCSI Commands
Page Control (PC) - This field indicates the type of mode page parameter values to return as shown in the
following table.
Page Code - This field determines which pages should be reported. A list of the supported pages is shown
in the previous table.
Allocation Length - This field specifies the number of bytes that the initiator allocated for returned MODE
SENSE data. A length of 0 means that the library will return no MODE SENSE data. This is not considered
to be an error.
Mode Sense (10) Response
The ten-byte MODE SENSE response consists of a single eight-byte Mode Parameter Header, followed by
zero or more mode pages. Each page is individually described in “Mode Pages.”
Mode Parameter Header
The following table shows the format of the Mode Parameter Header for the ten-byte MODE SENSE
command.
Mode Data Length - This specifies the length in bytes that is available to be transferred as part of the
response. The Mode Data Length does not include itself but does include the remaining six bytes of the
parameter header, as well as the overall total number of bytes being
Table 34 Page Control (PC) field
Page Control Description
0 0 Report current values defined by:
• The values set by the last successful MODE SELECT command.
• The default values if no saved values exist.
0 1 Report changeable values
1 0 Report default values
1 1 Report saved values (report default values if no pages are previously
saved)
Table 35 Mode Parameter Header format for Mode Sense (10)
Bit
Byte
7 6 5 4 3 2 1 0
0
Mode Data Length
1
2 Reserved
3 Reserved
4
Reserved
5
6
Reserved
7