Hitachi DK23DA-30F - 30 GB Hard Drive User manual

K6602705
Rev.3
08.20.01 - 1 -
OEM Manual
DK23DA-40F/30F/20F/10F Disk Drive
Specifications
REV.3
Caution for Safety
Read Safety descriptions carefully.
Read and recommend drive usage cautions to your end user.
Keep this manual with care.
(Total 112 pages)
H I T A C H I
All Rights Reserved, Copyright ©2001 Hitachi, Ltd.

K6602705
Rev.3
08.20.01 - 2 -
Rev.0: 06.07.01 Preliminary
Rev.1: 07.12.01
Rev.2: 07.19.01
Rev.3: 08.20.01
To use this product safely
To use the product, read safety descriptions below and understand thoroughly.
Keep this manual with care to insure unlimited use.
lGeneral Caution for Safety
The followings are general cautions for safe use of this product.
(Caution before Product Use)
- Please read and follow all instructions and cautions described on “Safety Instructions” (Page 4) and “1.2
General Caution” (Page 10 and 11) before attempting to use this product.
- Follow all instructions and cautions indicated throughout this manual and the product. Failure to follow
these instructions and cautions may cause injury, fire and product damage.
lAdvise your end user of the safety caution
Read and recommend that your end users read the caution for drive usage in this manual.
lProtect yourself
The safety instructions in this manual were thoroughly considered, but unexpected situations can occur.
Not only follow the instructions on this manual, but also be careful for the safety of yourself.
lHeadline of safety caution
Safety instructions and cautions are indicated as the following headline, which consists a word of “Caution”.
The indication and meaning are as follows:
Caution: This symbol indicates that potential danger may exist which may cause damage
to the product or to the neighboring prorerty ,if safety instructions are not followed.
lSafety caution in this manual
Followings are the cautions and contents described in this manual.
Items of indicating Caution :
-Safety Instructions Page 4
-General Caution Sec. 1.2, Page 10 – 11
-Power Supply Requirements Sec.3.1, Page 14
-Maximum Power off Interval Sec. 3.2, Page 15
-Data Reliability Sec. 3.2, Page 16
-Mounting HDD Sec. 4.2.1, Page 19
-Attention for HDD Installation Sec. 4.2.3, Page 21
-Packing Sec. 5.1, Page 23
-Handling Sec. 5.2, Page 24

K6602705
Rev.3
08.20.01 - 3 -
To use this product safely (Continued)
lEnvironmental circumstance
Although this product partially scatters electro-magnetic field into the air, it has been inspected and was
installed under Electro-magnetic regulations of resident areas, such as EMC standard EN55022
(corresponding to FCC part 15 Class B, etc.). However, anything other than this product, such as an
interface cable, is excluded. Therefore, the following cases require a system side improvement for the
electro-magnetic field regulations.
1) Disturbance of operations of other products or equipment in resident area
2) Disturbance caused by other product, such as cabling, to operations of other products or equipment.
Only Hitachi trained persons should change this product Hitachi assumes no responsibility for products
which have been changed by anyone else.
lSafety regulations
This product meets the following safety regulations, but the system side should consider the safety of the
system with this product.
Regulations: - UL1950 Third Edition dated July 28, 1995
- CSA C22.2 N0.950-M95
- IEC60950 A4: 1996
- EN60950 A11: 1992
Warranty and Limited Liability
This product is sold with a limited warranty and specific remedies are available to the original purchaser in
the event the product fails to conform to the limited warranty. Hitachi’s liability may be further limited in
accordance with its sales contact.
In general, Hitachi shall not be responsible for product damages caused by natural disasters, fire, static
discharge, misuse, abuse, neglect, improper handling or installation, unauthorized repair, alteration or
accident. In no event will Hitachi be liable for loss of data stored on product.
HITACHI SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES,
EVEN IF INFORMED OF THE POSSIBILITY THEREOF IN ADVANCE.
Please see your sales contract for a complete statement of warranty rights, remedies and limitation of
liability.

K6602705
Rev.3
08.20.01 - 4 -
Safety Instructions
1. The product is not authorized for use in life support devices or systems or other applications that pose a
significant risk of personal injury.
2. Since the drive uses glass media for the disk platter, opening of Metal Head Disk Assembly (HDA) may
cause bodily injury. Warranty void in case of opened HDA or any broken HDA seals. Don’t open the HDA
or break any HDA seals.
3. Dropping of the HDD may cause bodily injury. Handle with care.
4. Do not cover the breather hole. If the hole was covered with any material, it shall result in permanent
damage to the drive and/or loss of data. Label or seal shall be attached on the cover avoiding the
breather hole. Warranty void if the breather hole was covered.
5. Do not hit the interface connector pins against other objects. Do not make contact with the interface
connector pins. Contact causes pin dent, electrical discharge distraction or contact failure. Also, pins or
HDA corners may cause bodily injury. Handle with care.
6. Observe Clause 3.3 “Drive Usage Condition Specifications”. Since reliability and product life depends on
usage conditions, please consult our sales or application engineers.
7. Keep usage conditions within specifications (Power Supply, Environment, etc.). If the conditions are not
kept within the specifications, failures may occur.
8. Hot swapping (Power-on swapping) can damage the drive. The drive shall be swapped during Power Off
only.
9. Electro Static Discharge (ESD) can damage the drive. Protect the drive from ESD during handling.
10. Voltage rise time 5 - 100 ms at power on is required for power supply. The power supply voltage must not
be under below GND level (0 V) at power off.
11. This product is required over current protection for possible combustion due to circuit or component
failure. Secondary over current protection shall be prepared by the system. The requirement of the
current limitation is max. 10 A for the protection.
12. Improper insertion of connector or wrong jumper setting may cause catastrophic failures. Referring to
this manual prior to the connector insertion or jumper setting can help to insure correct insertion.
13. If a foreign conductive substance (metallic powder, fluid, etc.) adheres to active metal of the drive
(Printed pattern, component lead, etc. on PCBA), it may cause catastrophic failures. Customer should
protect the drive from the above condition.
14. The PCBA side of the drive should be covered with insulation sheet if the active metal of host system
may contact to the PCBA of the drive. If the insulation sheet is not provided for the possible contact of the
live metal, failures may occur.
15. Shock can result in permanent damage to the drive and/or loss of data. Prevent shocks, which is often
incurred by dropping, knocking over, or hitting the drive.
16. To fix the drive, use the size of screws and the torque recommended in this manual. If non-
recommended size screws and torque are used, it may cause catastrophic failures.
17. Do not press top cover. It may cause catastrophic failures. In case of steel plate installation on HDD
cover side, the spacing between HDD cover and steel plate should be kept more than 2 mm. If this
spacing is not kept for the steel plate, it may affect Load/Unload mechanism.
18. Do not push the bottom PCBA of the drive. It may cause catastrophic failures.
Caution

K6602705
Rev.3
08.20.01 - 5 -
Safety Instructions(Continued)
19. The long-term storage without power on should not exceed one year.
20. Prevent humidity when the drive is packed in a box.
21. Use original packages (50 units’ package) during drive transportation to protect from any damage.
(Keep some extra packages for the drive transportation)
22. To returning over 100 units, use original outside package with pallet or proper packaging with pallet to
protect from any damage.
23. Recorded data on the disk may be lost due to accidents such as disasters, shock damage during
handling or drive failure. To prepare for accidents, back up data. Hitachi does not perform data
recovery.
24. Data may be lost due to unexpected or accidental power loss during write operation.
NOTE TO USERS
While every effort has been made to ensure that the information provided herein is correct please feel free
to notify us in the event of an error or inconsistency.
Hitachi makes no representations or warranties with respect to the contents hereof and specifically
disclaims any implied warranties or merchantability or fitness for any purpose.
Further Hitachi reserves the right to revise this publication and to make changes from time to time in the
content hereof without obligation to notify any person of such revisions or changes.
Caution

K6602705
Rev.3
08.20.01 - 6 -
Contents Page
To use this product safely --------------------------- 2
1. 0 General --------------------------- 9
1.1 General --------------------------- 9
1.2 General Caution --------------------------- 10
2.0 Components --------------------------- 12
3.0 Specification Summary --------------------------- 13
3.1 Principal Specifications --------------------------- 13
3.2 Environmental Specifications and Reliability --------------------------- 15
3.3 Drive Usage Condition Specifications --------------------------- 16
3.4 Load/Unload Specifications --------------------------- 17
3.4.1 Normal Load/Unload --------------------------- 17
3.4.2 Emergency Unload --------------------------- 17
3.4.3 Required Power Off Sequence --------------------------- 17
4.0 Installation --------------------------- 18
4.1 Installation Direction --------------------------- 18
4.2 Mounting HDD --------------------------- 19
4.2.1 Mounting HDD with Screws --------------------------- 19
4.2.2 Single HDD Test Condition --------------------------- 20
4.2.3 Attention for HDD Installation --------------------------- 21
4.3 Drive Address Setting(DRIVE 0/DRIVE 1) --------------------------- 21
4.4 Dimensions --------------------------- 22
5.0 Packing and Handling --------------------------- 23
5.1 Packing --------------------------- 23
5.2 Handling --------------------------- 24
6.0 Interface --------------------------- 25
6.1 Power Interface --------------------------- 25
6.2 Physical Interface --------------------------- 26
6.2.1 Connector --------------------------- 26
6.2.2 Connector Pin Assignment --------------------------- 27
6.2.3 Description of the Interface Signals --------------------------- 28
6.3 Logical Interface --------------------------- 31
6.3.1 I/O Registers --------------------------- 31
6.3.1.1 Data Register --------------------------- 31
6.3.1.2 Error Register --------------------------- 31
6.3.1.3 Features Register --------------------------- 32
6.3.1.4 Sector Count Register --------------------------- 32
6.3.1.5 Sector Number Register --------------------------- 32
6.3.1.6 Cylinder Low Register --------------------------- 32
6.3.1.7 Cylinder High Register --------------------------- 32
6.3.1.8 Device/Head Register --------------------------- 33
6.3.1.9 Status Register --------------------------- 33
6.3.1.10 Command Register --------------------------- 33
6.3.1.11 Alternate Status Register --------------------------- 34
6.3.1.12 Device Control Register --------------------------- 34

K6602705
Rev.3
08.20.01 - 7 -
6.3.2 Command --------------------------- 35
6.3.2.1 Command Summary --------------------------- 35
6.3.2.2 Command BSY Timing --------------------------- 36
6.3.2.3 PIO Data In Commands --------------------------- 37
6.3.2.3.1 Identify Device [ECh] --------------------------- 38
6.3.2.3.2 Read Buffer [E4h] --------------------------- 45
6.3.2.3.3 Read Sectors [20h, 21h] --------------------------- 45
6.3.2.3.4 Read Long [22h, 23h] --------------------------- 45
6.3.2.3.5 Read Multiple [C4h] --------------------------- 45
6.3.2.4 PIO Data Out Commands --------------------------- 46
6.3.2.4.1 Write Buffer [E8h] --------------------------- 46
6.3.2.4.2 Write Sectors [30h, 31h] --------------------------- 46
6.3.2.4.3 Write Long [32h, 33h] --------------------------- 46
6.3.2.4.4 Write Multiple [C5h] --------------------------- 46
6.3.2.4.5 Format Track [50h] --------------------------- 47
6.3.2.5 Non-Data Commands --------------------------- 47
6.3.2.5.1 Initialize Device Parameters [91h] --------------------------- 47
6.3.2.5.2. Read Verify [40h, 41h] --------------------------- 48
6.3.2.5.3 Recalibrate [1Xh] --------------------------- 48
6.3.2.5.4 Seek [7Xh] --------------------------- 48
6.3.2.5.5 Set Features [EFh] --------------------------- 48
6.3.2.5.6 Set Multiple Mode [C6h] --------------------------- 49
6.3.2.5.7 Execute Device Diagnostic [90h] --------------------------- 49
6.3.2.5.8 Flush Cache [E7h] --------------------------- 50
6.3.2.6 Power Commands --------------------------- 51
6.3.2.6.1 Power Management --------------------------- 51
6.3.2.6.2 Advanced Power Management --------------------------- 52
6.3.2.6.3 Check Power Mode [98h, E5h] --------------------------- 53
6.3.2.6.4 Idle [97h, E3h] --------------------------- 54
6.3.2.6.5 Idle Immediate [95h, E1h] --------------------------- 54
6.3.2.6.6 Sleep [99h, E6h] --------------------------- 54
6.3.2.6.7 Standby [96h, E2h] --------------------------- 54
6.3.2.6.8 Standby Immediate [94h, E0h] --------------------------- 54
6.3.2.7 DMA Data In/Out Commands --------------------------- 55
6.3.2.7.1 Read DMA [C8h, C9h] --------------------------- 55
6.3.2.7.2 Write DMA [CAh, CBh] --------------------------- 55
6.3.2.8 SMART Feature --------------------------- 56
6.3.2.8.1 Attribute Parameters --------------------------- 56
6.2.7.8.2 SMART Device Error Log Reporting --------------------------- 57
6.2.7.8.3 SMART Operation with Management Modes --------------------------- 57
6.3.2.8.4 SMART Function Default Setting --------------------------- 57
6.3.2.8.5 SMART Enable Operations [B0h, Sub D8h] --------------------------- 57
6.3.2.8.6 SMART Disable Operations [B0h, Sub D9h] --------------------------- 58
6.3.2.8.7 SMART Return Status [B0h, Sub DAh] --------------------------- 59
6.3.2.8.8 SMART Enable/Disable Attribute AUTOSAVE [B0h, Sub D2h] ------------------ 59
6.3.2.8.9 SMART Save Attribute Values [B0h, Sub D3h] ----------------------------- 60
6.3.2.8.10 SMART Enable/Disable Automatic Off-line [B0h, Sub DBh] -------------------- 61
6.3.2.8.11 SMART Execute Off-line Immediate [B0h, Sub D4h] --------------------------- 62

K6602705
Rev.3
08.20.01 - 8 -
6.3.2.8.12 SMART Read Log Sector [B0h, Sub D5h] --------------------------- 65
6.3.2.8.13 SMART Write Log Sector [B0h, Sub D6h] --------------------------- 70
6.3.2.9 Security Mode Feature --------------------------- 71
6.3.2.9.1 Security Mode Default Setting --------------------------- 71
6.3.2.9.2 Initial Setting of the User Password --------------------------- 72
6.3.2.9.3 Security Mode Operation from Power-on or Hardware Reset ---------------------- 72
6.3.2.9.4 User Password Lost --------------------------- 73
6.3.2.9.5 Security Set Password [F1h] --------------------------- 74
6.3.2.9.6 Security Unlock [F2h] --------------------------- 75
6.3.2.9.7 Security Erase Prepare [F3h] --------------------------- 76
6.3.2.9.8 Security Erase Unit [F4h] --------------------------- 76
6.3.2.9.9 Security Freeze Lock [F5h] --------------------------- 77
6.3.2.9.10 Security Disable Password [F6h] --------------------------- 77
6.3.2.9.11 Security Mode Command Action [F1h] --------------------------- 78
6.3.2.10 Protected Area Feature, Address Offset Feature --------------------------- 79
6.3.2.10.1 Protected Area Feature and Set Max Security Extension -------------------------- 79
6.3.2.10.2 Address Offset Feature --------------------------- 80
6.3.2.10.3 Read Max Address Command [F8h] --------------------------- 82
6.3.2.10.4 Set Max Address Command [F9h, Sub 00h] --------------------------- 83
6.3.2.10.5 Set Max Set Password Command [F9h, Sub 01h] --------------------------- 85
6.3.2.10.6 Set Max Lock Command [F9h, Sub 02h] --------------------------- 85
6.3.2.10.7 Set Max Unlock Command [F9h, Sub 03h] --------------------------- 86
6.3.2.10.8 Set Max Freeze Lock Command [F9h, Sub 04h] --------------------------- 86
6.3.2.11 Device Configuration Overlay Feature --------------------------- 87
6.3.2.11.1 Device Configuration Restore [B1h, Sub 00h] --------------------------- 88
6.3.2.11.2 Device Configuration Freeze Lock [B1h, Sub 01h] --------------------------- 88
6.3.2.11.3 Device Configuration Identify [B1h, Sub 02h] --------------------------- 89
6.3.2.11.4 Device Configuration Set [B1h, Sub 03h] --------------------------- 91
6.3.2.12 Note for Write Cache and Auto Reallocation --------------------------- 95
6.4 Interface Signal Timing --------------------------- 96
6.4.1 Data Transfer Timing --------------------------- 96
6.4.2 Ultra DMA Data Transfer Timing --------------------------- 99
6.4.3 Power On and Hardware Reset Timing --------------------------- 109
< Glossary > --------------------------- 110
< Reference > --------------------------- 111

K6602705
Rev.3
08.20.01 - 9 -
1.0 General
1.1 Introduction
The DK23DA series disk drives reach high capacities (40GB,30GB,20GB and 10GB for 9.5mm height) in a
2.5 type form factor by applying the latest high-density recording technology.
Capacity
Model (Formatted) Height Interface
DK23DA-40F 40.007 GB 9.5 mm ATA-5(IDE)
DK23DA-30F 30.005 GB 9.5 mm ATA-5(IDE)
DK23DA-20F 20.003 GB 9.5 mm ATA-5(IDE)
DK23DA-10F 10.056 GB 9.5 mm ATA-5(IDE)
[Features]
-GMR Head
-ID-less Format
-ME2PRML Read Channel
-Data Transfer Rate
(Host-Device)
-16.6 MB/sec: PIO mode-4/Multiword DMA mode-2
- 100 MB/sec: Ultra DMA mode-5
(Device-Buffer)
- 18.7 to 34.7 MB/sec
-CDR (Constant Density Recording)
-On-the-fly ECC Correction
-Buffer: 2MB
-Read-ahead Cache/Write Cache
-Auto Read Reassign/Auto Write Reassign
-SMART
-Average Access Time 13 ms
-Embedded Sector Servo
-FDB(Fruid Brting) Motor
-Rotary Actuator
-Load/Unload Mechanism
-95 grams(DK23DA-40F/30F)/91 grams(DK23DA-20F/10F)
-Low Power Consumption: 0.65W(130mA) at Idle mode, 0.25W(50mA) at Standby mode
-Advanced Power Management(APM)
-Non-operating Shock 7,840m/S2(800G, 1ms, half-sine wave)
-Operating Shock 1,764m/S2(180G, 2ms, half-sine wave)
-MCC 2.5 inch Small Form Factor(9.5mm height)
[Identify Device Information for Setup]
Table 1.1 Identify Device information (Addressing)
Model Word 1
Number of CYL. Word 3 Number of HD Word 6 Number of SPT Word 60､61
Total LBA
DK23DA-40F 16383 (*1)
(3FFFh) 16
(0010h) 63 (3Fh) 78140160 (04A85300h)
DK23DA-30F 16383 (*1)
(3FFFh) 16
(0010h) 63 (3Fh) 58605120 (037E3E40h)
DK23DA-20F 16383 (*1)
(3FFFh) 16
(0010h) 63 (3Fh) 39070080 (02542980h)
DK23DA-10F 16383 (*1)
(3FFFh) 16
(0010h) 63 (3Fh) 19640880 (012BB230h)
*1. Maximum capacity in CHS mode is 8,455MB.

K6602705
Rev.3
08.20.01 - 10 -
1.2 General Caution
Adhere to the following cautions.
(a) Warranty void if Metal Head Disk Assembly (HDA) is opened, or any HDA seal/label is broken.
(b) Hot swapping (Power on) damages the drive. The drive should be swapped during Power Off only.
(c) Shock can result in permanent damage to the drive and/or loss of data.
Prevent shocks often incurred by dropping, knocking over, or hitting the drive.
(Dropping) (Knocking over)
(Hitting) (Hitting)
Figure 1-1
Caution
PREVENT SHOCKS
Caution

K6602705
Rev.3
08.20.01 - 11 -
(Continued)
(d) Do not cover the breather hole. If the hole was covered with any material, it shall result in permanent
damage to the drive and/or loss of data. Label or seal shall be attached on the cover avoiding the
breather hole. Warranty void if the breather hole was covered.
Caution Do not cover the breather hole
Breather hole
Figure 1-2 Breather hole location

K6602705
Rev.3
08.20.01 - 12 -
2.0 Components
DK23DA-40F/30F/20F/10F Disk Drive
Figure 2-1 Overview of DK23DA-40F/30F/20F/10F (9.5mm height)
Note: 1) Prepare connection cables referring to Sec. 6.2.
2) Mounting holes are compatible with DK237A-XX, DK238A-XX, DK239A-XX, DK23AA-XX,
DK23BA-xx, DK23BA-XXE,DK23CA-XX and DK23CA-XXF.

K6602705
Rev.3
08.20.01 - 13 -
3.0 Specification Summary
3.1 Principal Specifications Table 3.1 Principal Specifications
Specifications
No. Item DK23DA-
40F DK23DA- 30F DK23DA- 20F DK23DA- 10F
Units
1 Capacit
y
per drive
(
Formatted
)
40.007 30.005 20.003 10.056 GB
Capacit
y
per sector 512 B
y
tes
Disks 2211
Heads 4321
C
y
linders 33
,
067
2 Seek time Avera
g
e 13 *1 ms
(
Nominal Maximum 25 *1 ms
value
)
Minimum 3 ms
3Avera
g
e latenc
y
7.1 ms
Disk rotational speed 4
,
200 RPM
4 Recordin
g
densit
y
Max. 600 kBPI
Track densit
y
55.0 kTPI
Recordin
g
method ME2PRML
,
ID-Less format
5 Interface ATA-5
(
IDE
)
Data transfer rate
(
Disk-Buffer
)
18.7 – 34.7 MB/sec
Data transfer rate
(
Host-Buffer
)
Max. 16.6 MB/sec
(
PIO mode 4/ Multiword DMA mode 2
)
Max. 100
(
Ultra DMA mode 5
)
MB/sec
Buffer size 2
,
048 kB
6 Power on - Read
y
*2 5
(
T
y
pical
)
*3 sec
Sleep/Standb
y
- Read
y
*2 3
(
T
y
pical
)
*3 sec
7Dimensions（W×H×D) 70W×9.5H×100D mm
Wei
g
ht
(
Approximate value
)
95 95 91 91
g
rams
8 DC Power Requirements *4
(Typical)
+5v ±5% Ripple noise 150mvp-p or less
- Start up *5 0.90 A(4.5W)
- Idle *6 0.13 A(0.65W)
- Low Power Active *7 0.33 A(1.65W)
-Seek *8 0.45 A(2.25W)
- Read/Write *9 0.40/0.40 A(2.0/2.0W)
- Standby 0.050 A(0.25W)
- Sleep 0.020 A(0.1W)

K6602705
Rev.3
08.20.01 - 14 -
*1 :Average time of seek is calculated under the following condition. (Read/Write ratio: Read only)
Average of 10,000 random seeks, Voltage 5.0V, Temperature 25°C.
Maximum time of seek is calculated under the following condition.
Average of 1,000 full stroke seeks, Voltage 5.0V, Temperature 25°C.
This maximum time is not included the seek time by seek retry.
*2 :Periodically, during start up, the drive may perform a spin up retry operation. When this operation occurs,
the start up sound will change slightly and the ready timing will also be altered from typical time.
*3 :Power on to Ready time could take up to 20 seconds in case of spin up retries under certain
conditions of the voltage specifications(Table 3.1) and environmental specifications(Table 3.2).
*4 :For DC power input, the average current is measured at the connector of the PCBA of this drive and in
the nominal condition in which the power voltage and the temperature are 5.0V and 25°C, respectively.
Burst free (common mode). The average current may have some tolerance after power-on. The current
measurement is recommended at 5 minutes later after power-on.
Voltage rise time 5 - 100 ms at power on is required for power supply. The power
supply voltage must not be under below GND level ( 0 V) at power off.
This product is required over current protection for possible combustion due to
circuit or component failure. Secondary over current protection
shall be prepared
by the system. The requirement of the current limitation is max. 10 A for the
protection.
*5 :For more information, refer to Section 6.1.
*6 :This value is at Low Power Idle mode. The heads are unloaded.
*7 :Power mode automatically enters to Low Power Active mode after Read/Write operation. Head position
is kept on the same track before this power transition.
*8 :Measured during random seek , and the seek interval is 1.5 revolution times (i.e. the average latency
and one revolution).
*9 :Measured while reading or writing 16 sectors of data located on the same track.
Caution
Caution

K6602705
Rev.3
08.20.01 - 15 -
3.2 Environmental Specifications and Reliability
Table 3.2 Environmental Specification and Reliability
No. Item Specification
DK23DA-
40F DK23DA- 30F DK23DA- 20F DK23DA- 10F
1Ambient *1 Operational 5 to 55°C
temperature Non-operational -40 to 70°C *2
Temperature gradient Max. 20°C /hour
2 Relative humidity Operational 5 to 90 %
Non-operational 5 to 95 %
Maximum wet Operational 29°C (without condensation)
bulb Non-operational 40°C (without condensation) *3
3 Vibration Operational 1.0mm p-p or less (5 - 22Hz)
9.8 m/s2(1.0G) or less m/s2(22 – 500Hz)
Non-operational 5mm p-p or less (5 – 22Hz)
49m/s2(5G) or less (22 – 500Hz)
4Shock *6 Operational 1,764m/s2(180G) or less (2 ms, half sine wave)
Non-operational 7,840m/s2(800G) or less (1 ms, half sine wave)
5 Atmospheric condition Without corrosive vapors or salt
Idle Typical 2.4 Bels6 Acoustic-noise
*4 seek Typical 3.1 Bels
7 Height Operational 3,000m or less
(Altitude) Non-operational 12,000m or less
Height gradient Max. 300m/min.(3.1kpa/min.)
8
(*5)Data reliability
(with retries and ECC) Less than 1 non-recoverable error in 10 E 13 bits read
9 External magnetic field 1,500 micro Tesla (DC) or less
*1 :Ambient temperature should be measured at point 10 mm away from the nameplate of the drive. If the
maximum operational ambient temperature cannot be measured at a point 10 mm away from the
nameplate, a substitution method is stipulated in the table below.
Ambient
temperature Temperature at cover (Point A)
55°C62
°C
5°C5
°C
*2 :In case the ambient temperature is -40 to 0°C, the drive should be
packed in HDD package box. Please see specification 5.1 Packing
for reference.
Maximum power-off interval is 12 months.
*3 :In case of the maximum wet bulb 40°C , the drive should be packed in HDD package box with ESD bag
and desiccant. Please see specification 5.1 Packing for reference. If the drive is not packed in the HDD
package box with ESD bag and desiccant, maximum wet bulb 29°C is applied.
Caution
Measurement point
(Point A）

K6602705
Rev.3
08.20.01 - 16 -
*4 :3.9 Bels are the maximum sound power levels with A-weighted . This value is specified at product
shipment, except during startup, load, unload or stop. Clicking noise of releasing magnet latch will occur
at power-on and loading operation. Also, the licking noise of locking magnet latch will occur at normal
and emergency unloading operations.The value of seek mode is at ranom seek operation,intervals of
48ms.
*5 : Data reliability is not to be used to compromise the host system data backup.
For the HDD evaluation, long term operation is not recommended. In case of
evaluation, once or more unload operation by Power off , Standby or Sleep is
recommended within twelve hours’ power on time.
*6 :These shock specifications are defined for each axis. For non-operating rotational shock, the
specification is 15K radian/sec2or less (2 ms, half sine wave).
3.3 Drive Usage Condition Specifications
The drive is designed for usage under the following conditions. Since reliability and product life depends on
usage conditions, please consult our sales representatives or application engineers if the drive may be
operated outside these conditions.
-Power on hours (POH) : Less than 160 hours/month
POH includes Sleep and Standby modes.
The heads are unloaded during Power off, Standby, Sleep or Low Power Idle
modes. The spindle motor is stopped during Standby and Sleep modes.
-Operating (Seek/Write : Less than 20% of POH
Read operations)
-Motor Start/Stop Count : Max. 100,000 times. This number includes Standby, Sleep and power-on/off
count.
-Environment : Within environmental specifications given in Table 3.2
-Power Requirement : Within DC power requirement specifications given in Table 3.1 “Principal
Specifications”
-Drive Grounding : Drive frame should be grounded to system ground with four screws electrically.
Grounding noise should be less than 500mVp-p. The grounding noise
should be measured between electrical ground and system frame ground
without the drive. Grounding AC current (measuring between two of side
mounting holes) should be less than 50 mAp-p (Frequency Range: less than
20MHz). The grounding current should be measured through 50 ohm resistor.
-External Magnetic Field : Within specifications given in Table 3.2
-Mounting : Mount with recommended screws and regular torque.
-Physical/Electrical Interface: ATA-5
-Handling : Do not add Electrical Static Discharge, and Vibration and Shock to the drive.
Do not press top cover and bottom PCBA surface of the drive.
Caution

K6602705
Rev.3
08.20.01 - 17 -
3.4 Load/Unload Specifications
Load /Unload is a mechanism to load/unload the heads on the disk surfaces.
3.4.1 Normal Load/Unload
Normal load/unload operations are limited to maximum 300,000 times during HDD life. The normal unload
operation is performed by the following commands.
-Standby
-Standby Immediate
-Sleep
Also, the normal unload is automatically performed by control software, during Idle mode. The above normal
unload time does not include an emergency unload as explained in Sec. 3.4.2.
3.4.2 Emergency Unload
The emergency unload is occurred by unexpected power down, and is limited to maximum 20,000 times
during HDD life. Since normal unload can not be performed by the software control after power off, the
heads are unloaded by a hardware control. The maximum number of emergency unload is defined
separately.
3.4.3 Required Power Off Sequence
To operate the load/unload normally, the following BIOS sequence is required by Host system before power
off.
[Sequence #1]: Execute one of following commands.
-Standby
-Standby Immediate
-Sleep
Note: Such as Soft Reset, Flush Cache command or Check Power Mode command does
not unload the heads.
[Sequence #2]: Check the Status Register, and wait the command complete.
Note: The head is unload by the sequence #1 command, and the command completion
normally takes about 400 ms. Considering the error retries, BIOS timer should be set
to over 30 sec by the Host side.
[Sequence #3]: Power off the drive
Above sequence is required for the Host system at Power off, Suspend and Hibernation operations.

K6602705
Rev.3
08.20.01 - 18 -
4.0 Installation
4.1 Installation Direction
The DK23DA-40F/30F/20F/10F can be installed in the 6 directions as shown below.
Figure 4-1 Installation

K6602705
Rev.3
08.20.01 - 19 -
4.2 Mounting HDD
4.2.1 Mounting HDD with screws
Mount the HDD with the screws according to the following instruction to optimize the
performance.
(a) Mount the HDD with M3 screws. Take care not to add any distorting force to the HDD when mounting.
Using 4 screws holes, secure the HDD.
(b) Use screws with the following specifications when the HDD is mounted.
i) M3 (screw engagement of 2.5mm max)
ii) The torque for fixing the screws is 3±0.5kgcm(2.6±0.4 lb. inch)
(c) Any distortion of HDD over 0.020mm should be avoided. Take care that the system chassis are
flat enough.
(d) Consider an appropriate cooling to keep the temperature of center of HDD top cover less than 62°C.
(e) The inertia of the chassis around the Z-axis of the gravity center of the device must be more than
7 X 10-4 kg m2.
Note) In case of general Sub-Notebook PC(Weight: 1.7kg), the inertia of the chassis around the Z-axis of
the gravity center of the device is greater than 100 X 10-4 kg m2. Therefore, the required inertia level
has no problem with the general electronic equipment.
Caution
(0.2)
4-M3x0.5
Chassis
XZ
Y
(
Unit: mm
)
HDD
Figure 4-2 Mounting the HDD

K6602705
Rev.3
08.20.01 - 20 -
4.2.2 Single HDD Test Condition
To optimize the performance, keep the following instructions.
1) For the Single HDD test, HDD should be placed on an ABS-sheet. HDD should be place with
no movement by external force min. 0.39N for X axis and Y-axis directions.
2) Don’t place HDD on a soft sponge sheet or hard surface at HDD test. If the HDD is placed on
the soft sponge sheet or slippery hard desk surface, the HDD has unstable conditions such as HDD
self-vibration at seek operations or spindle motor rotation. It may cause performance reduction or
some errors. Also, HDD floating by tension of I/F cabling may cause the similar symptom. The HDD
should be placed without any floating. Don’t test the HDD under these unstable conditions.
3) If the HDD cannot be fixed by the required holding torque above item 1), put a body weight on the
HDD as shown in Figure 4-3. The body weight is provided for preventing the HDD movement or HDD
floating by tension of I/F cabling.
Use the body weight as specified below.
Material : SS41 with ELP-coat
Weight : M=0.66kg
Inertia : I=7.3X10 kg m
Figure 4-3 Single HDD Test Condition
Y Axis Direction
X Axis Direction
(70)
(13)
(92)
Weight
SS41 with Insulation sheet
(m=0.66kg, I=7.3X10 kg m )
-4 2
HDD
ABS-sheet
(t = 5mm)