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SMART Read Attribute Thresholds, SMART Enable-Disable Attribute AutoSave

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5.3 Host Commands Table 5.7 Features Register values (subcommands) and functions (1 of 3) Features Resister X'D0' X'D1' X'D2' X'D3' X'D4' Function SMART Read Attribute Values: A device that received this subcommand asserts the BSY bit and saves all the updated attribute values. The device then clears the BSY bit and transfers 512-byte attribute value information to the host. * For information about the format of the attribute value information, see Table 5.8. SMART Read Attribute Thresholds: This subcommand is used to transfer 512-byte insurance failure threshold value data to the host. * For information about the format of the insurance failure threshold value data, see Table 5.9. SMART Enable-Disable Attribute AutoSave: This subcommand is used to enable (SC register ≠ 00h) or disable (SC register = 00h) the setting of the automatic saving feature for the device attribute data. The setting is maintained every time the device is turned off and then on. When the automatic saving feature is enabled, the attribute values are saved before the device enters the power saving mode. However, if the failure prediction feature is disabled, the attribute values are not automatically saved. When the device receives this subcommand, it asserts the BSY bit, enables or disables the automatic saving feature, then clears the BSY bit. SMART Save Attribute Values: When the device receives this subcommand, it asserts the BSY bit, saves device attribute value data, then clears the BSY bit. SMART Executive Off-line Immediate: A device which receives this command asserts the BSY bit, then starts collecting the off-line data specified in the SN register, or stops. In the off-line mode, after BSY is cleared, off-line data are collected. In the captive mode, it collects off-line data with the BSY assertion as is, then clears the BSY when collection of data is completed. SN Off-line data collection mode 00h: Off-line diagnosis (off-line mode) 01h: Simple self test (off-line mode) 02h: Comprehensive self test (off-line mode) 7Fh: Self test stop 81h: Simple self test (captive mode) 82h: Comprehensive self test (captive mode) C141-E120-02EN 5-65

Section	Page
Front Cover	1
FOR SAFE OPERATION	2
Revision History	3
Preface	5
Important Alert Items	9
Manual Organization	11
Contents	13
Figures	18
Tables	19
CHAPTER 1 Device Overview	21
1.1 Features	22
1.1.1 Functions and performance	22
1.1.2 Adaptability	22
1.1.3 Interface	23
1.2 Device Specifications	24
1.2.1 Specifications summary	24
1.2.2 Model and product number	25
1.3 Power Requirements	25
1.4 Environmental Specifications	27
1.5 Acoustic Noise	28
1.6 Shock and Vibration	28
1.7 Reliability	29
1.8 Error Rate	30
1.9 Media Defects	30
1.10Load/Unload Function	30
CHAPTER 2 Device Configuration	33
2.1 Device Configuration	34
2.2 System Configuration	36
2.2.1 ATA interface	36
2.2.2 1 drive connection	36
2.2.3 2 drives connection	36
CHAPTER 3 Installation Conditions	39
3.1 Dimensions	40
3.2 Mounting	41
3.3 Cable Connections	47
3.3.1 Device connector	47
3.3.2 Cable connector specifications	48
3.3.3 Device connection	48
3.3.4 Power supply connector (CN1)	49
3.4 Jumper Settings	49
3.4.1 Location of setting jumpers	49
3.4.2 Factory default setting	50
3.4.3 Master drive-slave drive setting	50
3.4.4 CSEL setting	51
CHAPTER 4 Theory of Device Operation	53
4.1 Outline	54
4.2 Subassemblies	54
4.2.1 Disk	54
4.2.2 Head	54
4.2.3 Spindle	55
4.2.4 Actuator	55
4.2.5 Air filter	55
4.3 Circuit Configuration	56
4.4 Power-on Sequence	59
4.5 Self-calibration	60
4.5.1 Self-calibration contents	60
4.5.2 Execution timing of self-calibration	61
4.5.3 Command processing during self-calibration	62
4.6 Read/write Circuit	62
4.6.1 Read/write preamplifier (HDIC)	62
4.6.2 Write circuit	62
4.6.3 Read circuit	65
4.6.4 Digital PLL circuit	66
4.7 Servo Control	67
4.7.1 Servo control circuit	67
4.7.2 Data-surface servo format	70
4.7.3 Servo frame format	72
4.7.4 Actuator motor control	73
4.7.5 Spindle motor control	74
CHAPTER 5 Interface	77
5.1 Physical Interface	78
5.1.1 Interface signals	78
5.1.2 Signal assignment on the connector	79
5.2 Logical Interface	82
5.2.1 I/O registers	83
5.2.2 Command block registers	84
5.2.3 Control block registers	89
5.3 Host Commands	89
5.3.1 Command code and parameters	90
5.3.2 Command descriptions	92
5.3.3 Error posting	164
5.4 Command Protocol	166
5.4.1 PIO Data transferring commands from device to host	166
5.4.2 PIO Data transferring commands from host to device	168
5.4.3 Commands without data transfer	170
5.4.4 Other commands	172
5.4.5 DMA data transfer commands	172
5.5 Ultra DMA Feature Set	175
5.5.1 Overview	175
5.5.2 Phases of operation	176
5.5.3 Ultra DMA data in commands	176
5.5.4 Ultra DMA data out commands	181
5.5.5 Ultra DMA CRC rules	185
5.5.6 Series termination required for Ultra DMA	186
5.6 Timing	187
5.6.1 PIO data transfer	187
5.6.2 Multiword data transfer	188
5.6.3 Ultra DMA data transfer	189
5.6.4 Power-on and reset	202
CHAPTER 6 Operations	203
6.1 Device Response to the Reset	204
6.1.1 Response to power-on	204
6.1.2 Response to hardware reset	205
6.1.3 Response to software reset	207
6.1.4 Response to diagnostic command	208
6.2 Power Save	209
6.2.1 Power save mode	209
6.2.2 Power commands	210
6.3 Defect Management	211
6.3.1 Spare area	211
6.3.2 Alternating defective sectors	211
6.4 Read-Ahead Cache	213
6.4.1 Data buffer configuration	214
6.4.2 Caching operation	214
6.4.3 Usage of read segment	216
6.5 Write Cache	222
Glossary	225
Acronyms and Abbreviations	229
Comment Form	231
Spine	233

Match case Limit results 1 per page

5.3

Host Commands

C141-E120-02EN

5-65

Table 5.7

Features Register values (subcommands) and functions (1 of 3)

Features Resister

Function

X’D0’

SMART Read Attribute Values:

A device that received this subcommand asserts the BSY bit and saves all

the updated attribute values.

The device then clears the BSY bit and

transfers 512-byte attribute value information to the host.

For information about the format of the attribute value information, see

Table 5.8.

X’D1’

SMART Read Attribute Thresholds:

This subcommand is used to transfer 512-byte insurance failure threshold

value data to the host.

For information about the format of the insurance failure threshold value

data, see Table 5.9.

X’D2’

SMART Enable-Disable Attribute AutoSave:

This subcommand is used to enable (SC register

≠

00h) or disable (SC

attribute data.

The setting is maintained every time the device is turned off

and then on.

When the automatic saving feature is enabled, the attribute

values are saved before the device enters the power saving mode.

However,

if the failure prediction feature is disabled, the attribute values are not

automatically saved.

When the device receives this subcommand, it asserts the BSY bit, enables

or disables the automatic saving feature, then clears the BSY bit.

X’D3’

SMART Save Attribute Values:

When the device receives this subcommand, it asserts the BSY bit, saves

device attribute value data, then clears the BSY bit.

X’D4’

SMART Executive Off-line Immediate:

A device which receives this command asserts the BSY bit, then starts

collecting the off-line data specified in the SN register, or stops.

In the off-line mode, after BSY is cleared, off-line data are collected. In the

captive mode, it collects off-line data with the BSY assertion as is, then

clears the BSY when collection of data is completed.

Off-line data collection mode

00h:

Off-line diagnosis (off-line mode)

01h:

Simple self test (off-line mode)

02h:

Comprehensive self test (off-line mode)

7Fh:

Self test stop

81h:

Simple self test (captive mode)

82h:

Comprehensive self test (captive mode)