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Endurastar
J4K50 and N4K50
Specifi cations
Model(s)
Interface
Capacity (GB)
1
Sector size (variable, Bytes/sector)
Recording zones
Data heads (physical)
Data Disks
Max. areal density (Gbits/sq. in.)
Performance
Data buffer (MB)
2
Rotational speed (RPM)
Latency average (ms)
Media transfer rate (Mbits/sec, max)
Interface transfer rate (MB/sec, max)
Seek time (read, typical) (avg. ms)
Maximum (typical, ms)
Minimum (typical, ms)
Reliability
Error rate (non-recoverable)
Load/unload
Availability
3
(hrs/day x days/wk)
Power
Requirement
Startup (W, peak, max.)
Read / Write (W, avg.)
Low power idle (W, avg.)
Standby (W, avg.)
Sleep (W)
Physical size
z-height (mm)
Dimensions (width x depth, mm)
Weight (g, typ.)
Environmental (operating)
Ambient temperature
Altitude (m)
Shock (half-sine wave)
Vibration (sine wave)
Environmental (non-operating)
Ambient temperature
Altitude (m)
Shock (half-sine wave)
Vibration (sine wave)
Acoustics (A-weighted sound power)
Idle (Bels, typ.)
Op (Bels, typ.)
Hitachi Global Storage Technologies' trademarks are authorized for use in countries and jurisdictions in which Hitachi Global Storage Tech-
nologies has the right to use, market and advertise the brands. Contact Hitachi Global Storage Technologies for further information. Hitachi
Global Storage Technologies shall not be liable to third parties for unauthorized use of Hitachi Global Storage Technologies trademarks..
References in this publication to Hitachi Global Storage Technologies' products, programs, or services do not imply that Hitachi Global
Storage Technologies intends to make these available in all countries in which it operates.
Product specifi cations provided are sample specifi cations and do not constitute a warranty. Information is true as of the date of
publication and is subject to change. Actual specifi cations for unique part numbers may vary. Please visit the Support section of our website,
www.hitachigst.com/support, for additional information on product specifi cations. Photographs may show design models.
DSEJ425007EN-02
Endurastar J4K50
HEJ425050F9AT00
HEJ425030F9AT00
HEN425040F9AT00
ATA-6
50 / 40 / 30
512
24
2
1
86.1
8
4260
7.04
388
100 Ultra DMA mode-5
16.6 PIO mode-4
13
24
3
< 1 per 10
13
bits transferred
600,000
24x7
+5 VDC (+/-5%)
6.5
2.15
0.8
0.15
0.1
9.5
70 x 100
95
-30° to 85° C
-300 to 5,000
250G (2ms)
Up to 3G (10-500Hz)
-40° to 95° C
-300 to 15,000
800G (1ms)
Up to 5G (10-500Hz)
2.4
3.0
Endurastar N4K50
Hitachi quality and service
Hitachi Endurastar hard disk drives are designed
HEJ425040F9AT00
HEN425050F9AT00
to the highest quality standards and contain fi eld-
HEN425030F9AT00
proven components. Hitachi provides worldwide
f
technical support and integration services to
f
enable global customers to bring their products
f
to market quickly.
f
Hitachi drives are backed by an array of technical
f
support and services, which may include
f
customer and integration assistance. Hitachi is
f
dedicated to providing a breadth of hard disk
drive solutions to satisfy all of today's demanding
f
computing needs.
f
How to read the Travelstar model number
f
HTJ425050F9AT00 = 50 GB/8 MB buffer
f
H = Hitachi
f
E = Endurastar
J = J4K50 model (N = N4K50)
f
42 = 4200 RPM
f
50 = Full capacity — 50 GB
f
50 = Capacity this model, 50 = 50 GB
f
F = Generation code
f
9 = 9.5mm z-height
f
AT = ATA interface
0 = Feature code
f
0 = Reserved
f
Information and Technical Support
f
www.hitachigst.com (Main Web site)
f
www.hitachigst.com/partners (Partner Web site)
f
North America
f
support_usa@hitachigst.com
Toll free: 1 888 426-5214, Direct: 1 507 322-2370
f
f
Asia Pacifi c
support_ap@hitachigst.com / 65 6840 9595
f
EMEA and UK
-16o to 70o C
support_uk@hitachigst.com / 44 20 7133 0032
-300 to 3,000
Germany
f
support_uk@hitachigst.com / 49 6929 993601
f
Program Support
Partners First
f
channelpartners@hitachigst.com
f
f
f
1 One GB is equal to one billion bytes when referring to hard drive
f
2 Portion of buffer capacity used for drive fi rmware.
3 Intended for less than 20 percent duty cycle industrial applications
f
© 2007 Hitachi Global Storage Technologies
Hitachi Global Storage Technologies
3403 Yerba Buena Road
San Jose, CA 95135 USA
Produced in the United States 8/06. Revised 3/08.
All rights reserved.
Endurastar
Hitachi Global Storage Technologies.
(40 = 40 GB, 30 = 30 GB)
™
Program
capacity. Accessible capacity may be less.
and other non mission critical applications.
™
and Partners First
™
are trademarks of
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