
9-2
SCSI REFERENCE 1014826
CHAPTER 9—MODE SELECT (15h)
Notes:
Before issuing any MODE SELECT commands, issue a MODE SENSE (1Ah)
command with the PC field set to 1h and the Page Code field set to 3Fh to
determine which pages of mode parameters are supported, which parameters
within the pages are changeable, and the supported length of each page. See
Chapter 10 for more information about the MODE SENSE command.
When you issue a MODE SELECT command, the parameters are not changed
until the library has verified that the new values are valid. If any value is not valid,
the library returns the appropriate error (see Section 9.3) and does not change
the MODE SELECT parameters.
9.2 WHAT YOU SEND TO THE LIBRARY
PF (Page Format) – Byte 01, Bit 4
This field specifies the page format used by the library. The library supports
the page format specified by SPC-2. This value must be 1.
SP (Saved Page) – Byte 01, Bit 0
The library supports the saved page function. The values for this field are as
follows:
Parameter List Length – Byte 04
This field indicates the length of the entire parameter list. The parameter list
length is equal to the length of one Parameter List Header (4 bytes) plus the
lengths of all pages to be transferred. Ta b l e 9 - 1 lists the page lengths. If no
pages are to be transferred, specify 0 for the Parameter List Length field.
Note: A parameter list length of 4 is not valid. When you send the Parameter List
Header, you must send at least one page with it.
0
Current configuration values are changed to the values
sent to the library. Saved values stored in nonvolatile
memory are not affected.
1
Current configuration values specified by this command
are saved in nonvolatile memory and are used for
subsequent operations.
Table 9-1 MODE SELECT page lengths
Page Length (bytes)
Element Address Assignment Page 14h (20)
Unique Properties Page 6h (6)
LCD Mode Page 24h (36)
Cleaning Configuration Page 4h (4)
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