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SMART Write Log
B0
D6
SMART Enable Operations
B0
D8
SMART Disable Operations
B0
D9
SMART Return Status
B0
DA
SMART Enable/Disable Automatic Off-line
B0
DB
Table 84 shows the commands that are supported by the device. Table 85 shows the sub-commands 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 0.
1
Indicates that the bit must be set to 1.
D
The device number bit. Indicates that the device number bit of the Device/Head Register should be specified.
This bit is reserved since all Serial ATA devices behave like Device 0.
H
Head number. Indicates that the head number part of the Device/Head Register is an output parameter and
should be specified.
L
Indicates the addressing mode. = 1 device supports LBA addressing mode.
R
Retry. Original meaning is already obsolete, there is no difference between 0 and 1. (Using 0 is recommended
for future compatibility.)
B
Option Bit. Indicates that the Option Bit of the Sector Count Register should be specified. (This bit is used by
Set Max ADDRESS command)
V
Valid. Indicates that the bit is part of an output parameter and should be specified.
X
Indicates that the hex character is not used.
-
Indicates that the bit is not used.
Input Registers
0
Indicates that the bit is always set to 0.
1
Indicates that the bit is always set to 1.
H
Head number. Indicates that the head number part of the Device/Head Register is an input parameter and will
be set by the device.
V
Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1 by the device.
-
Indicates that the bit is not part of an input parameter.
The command descriptions show the contents of the Status and Error Registers after the device has completed
processing the command and has interrupted the host.
Please refer to ATA interface specifications about other commands’ descriptions which are not described in this SATA
interface specification. However, be careful that Serial ATA Device/Head register bit-4 (d) is different from that of
Parallel ATA. In Serial ATA, Device/Head register bit-4 is reserved for all commands.
137
Hard Disk Drive Specification