Figure 85. Command Set (Subcommand) - IBM DTLA-305040 - Deskstar 41.1 GB Hard Drive Specifications

Command (Subcommand)
S.M.A.R.T. Function
SMART Read Attribute Values
SMART Read Attribute Thresholds
SMART Enable/Disable Attribute Autosave
SMART Save Attribute Values
SMART Execute Off-line Data Collection
SMART Read Log
SMART Write Log
SMART Enable Operations
SMART Disable Operations
SMART Return Status
SMART Enable/Disable Automatic Off-line
Set Features
Enable Write Cache
Set Transfer Mode
40 bytes of ECC apply on Read/Write Long
Disable read look-ahead feature
Enable release interrupt
Disable reverting to power on defaults
Disable write cache
Enable read look-ahead feature
4 bytes of ECC apply on Read/Write Long
Enable reverting to power on defaults
Disable release interrupt

Figure 85. Command set (Subcommand)

Figure 84 on pages 30 and 0 shows the commands that are supported by the device. Figure 85 shows
the subcommands that are supported by each command or feature.
The following symbols are used in the command descriptions:
Output Registers
0 Indicates that the bit must be set to zero.
1 Indicates that the bit must be set to one.
D The device number bit. Indicates that the device number bit of the Device/Head Register
should be specified. Zero selects the master device and one selects the slave device.
H Head number. Indicates that the head number part of the Device/Head Register is an
output parameter and should be specified.
L LBA mode. Indicates the addressing mode. Zero specifies CHS mode and one does LBA
addressing mode.
R Retry. Indicates that the Retry bit of the Command Register should be specified.
Deskstar 40GV & 75GXP hard disk drive specifications
Command
Code (Hex)
B0
B0
B0
B0
B0
B0
B0
B0
B0
B0
B0
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
107
Feature
Register
(Hex)
D0
D1
D2
D3
D4
D5
D6
D8
D9
DA
DB
02
03
44
55
5D
66
82
AA
BB
CC
DD