Supported Scsi Commands - Maxtor ATLAS 10K III Product Manual

This chapter contains an overview of SCSI command and status processing and a
detailed description of the commands supported by the disk drives. The SCSI
command system enables the initiator to instruct the drive to perform specific
functions.
In this manual, unless otherwise stated, numerical values are given in decimal.
Hexadecimal numbers, such as opcodes, are always given with an "h" following, as in
5Ah except when entire data tables are in hexadecimal.
The disk drives support the SCSI-3 commands listed in Table 5-1. The command
categories are sequential, normal, and immediate.
Immediate commands are processed when received by the drive. In most cases, these
commands do not require drive resources, do not change the state of the drive, and
bypass the command queue (unless the command is tagged).
Sequential commands execute in the order that they arrive (unless accompanied by
a HEAD OF QUEUE tag) and execute to completion before a subsequent command
is activated.
Normal commands are allowed to execute concurrently (with the restriction that the
drive executes overlapping writes in the order received). Normal commands are
usually I/O commands
T a b l e 5 - 1 Supported SCSI Commands
CHANGE DEFINITION
FORMAT UNIT
INQUIRY
LOG SELECT
LOG SENSE
MODE SELECT (6)
MODE SELECT (10)
MODE SENSE (6)
MODE SENSE (10)
PERSISTENT RESERVATION IN
% J C R V G T 
5 % 5 + & G U E T K R V K Q P
40h
04h
12h
4Ch
4Dh
15h
55h
1Ah
5Ah
5Eh
Maxtor Atlas 10K III
Sequential
Sequential
Immediate
Sequential
Sequential
Sequential
Sequential
Sequential
Sequential
Sequential
5-1