Operating instructions

9-2
SCSI REFERENCE 1012975
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 autoloader has verified that the new values are valid. If any value is not
valid, the autoloader returns the appropriate error (see Section 9.3) and does
not change the MODE SELECT parameters.
9.2 WHAT YOU SEND TO THE AUTOLOADER
PF (Page Format) – Byte 01, Bit 4
This field specifies the page format used by the autoloader. The autoloader
supports the page format specified by SPC-2. This value must be 1.
SP (Saved Page) – Byte 01, Bit 0
The autoloader supports the saved page function. The values for this field are
as follows:
0 – Current configuration values are changed to the values sent to the
autoloader. 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.
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.
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)