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Chapter 8 SCSI Commands
Table 8.4.7.2 : History log parameter codes
The History Log Page format is shown in Table 8.4.7.3.
Table 8.4.7.3 : History Log page Format
8.5. MODE SELECT(6) Command (15h)
The MODE SELECT(6) command provides to the host with functions used to
set various autoloader parameters. Before the host issues the MODE SELECT
command, it issues a MODE SENSE command to check the Page, Page Length,
and other parameters supported by the autoloader.
Table 8.5.1 : MODE SELECT(6) command
The autoloader supports the same Page(s) for all hosts.
When a host sends a MODE SELECT command and changes a parameter that
applies to another host, the autoloader generates a UNIT ATTENTION
CONDITION for all hosts other than the host that issued the MODE SELECT
command. The autoloader sets ASC/ASCQ to MODE PARAMETERS
CHANGED.
When the Page Format (PF) bit is 0, the MODE SELECT parameters are the
same as specified for SCSI-1. (All the parameters except the vendor-specific
Block Descriptor are transferred.) When the PF bit is 1, the MODE SELECT
parameters follow the Parameter List Header.
Parameter code
Description
0000h - 00FFh
The history log pointer
0100h - FFFFh
Reserved
Bit
Byte
7
6
5
4
3
2
1
0
0
(MSB)
Parameter Code
1
(LSB)
2
DU(0)
DS(1)
TSD(0) ETC(0)
TMC(0)
Reserved
LP(1)
3
Parameter Length(n-3)
4
History Data
...
n
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation code (15h)
1
Logical unit number(0h)
PF
Reserved
SP
2
Reserved(0h)
3
Reserved(0h)
4
Parameter list length
5
Control(0h)
