Endurastar™J4K30 and N4K30
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Product specifications provided are sample specifications and do not constitute a warranty. Information is true as of the date of
publication and is subject to change. Actual specifications for unique part numbers may vary. Please visit the Support section of our website,
www.hitachigst.com/support, for additional information on product specifications. Photographs may show design models.
© 2007 Hitachi Global Storage Technologies
Hitachi Global Storage Technologies
3403 Yerba Buena Road
San Jose, CA 95135 USA
Produced in the United States 12/04. Revised 3/08.
All rights reserved.
Endurastar™and Partners First™are trademarks of
Hitachi Global Storage Technologies.
DSEJ423007EN-02
Hitachi quality and service
Hitachi Endurastar hard disk drives are designed
to the highest quality standards and contain field-
proven components. Hitachi provides worldwide
technical support and integration services to
enable global customers to bring their products to
market quickly.
Hitachi drives are backed by an array of technical
support and services, which may include
customer and integration assistance. Hitachi is
dedicated to providing a breadth of hard disk
drive solutions to satisfy all of today’s demanding
computing needs.How to read the Travelstar
model number
How to read the Travelstar model number
HTJ423030F9AT00 = 30GB/8 MB buffer
H = Hitachi
E = Endurastar
J = J4K50 model (N = N4K50)
42 = 4200 RPM
30 = Full capacity — 30GB
30 = Capacity this model, 30 = 30GB
(20 = 20GB)
F = Generation code
9 = 9.5mm z-height
AT = ATA interface
0 = Feature code
0 = Reserved
Information and Technical Support
www.hitachigst.com (Main Web site)
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Specifications Endurastar J4K50 Endurastar N4K50
Model(s) HEJ423030F9AT00 HEJ423020F9AT00
HEN423030F9AT00 HEN423020F9AT00
Interface ATA-5 (IDE) f
Capacity (GB) 130 / 20 f
Sector size (variable, Bytes/sector) 512 f
Recording zones 16 f
Data heads (physical) 2 f
Data Disks 1 f
Max. areal density (Gbits/sq. in.) 56.5 f
Performance
Data buffer (MB) 28 f
Rotational speed (RPM) 4172 f
Latency average (ms) 7.19 f
Media transfer rate (Mbits/sec, max) 361 f
Interface transfer rate (MB/sec, max) 100 Ultra DMA mode-5 f
16.6 PIO mode-4
Seek time (read, typical) (avg. ms) 13 f
Maximum (typical, ms) 24 f
Minimum (typical, ms) 3 f
Reliability
Error rate (non-recoverable) < 1 per 1013 bits transferred f
Load/unload 300,000 f
Availability 3(hrs/day x days/wk) 24x7 f
Power
Requirement +5 VDC (+/-5%) f
Startup (W, peak, max.) 6.5 f
Read / Write (W, avg.) 2.15 f
Low power idle (W, avg.) 0.6 f
Standby (W, avg.) 0.15 f
Sleep (W) 0.1 f
Physical size
z-height (mm) 9.5 f
Dimensions (width x depth, mm) 70 x 100 f
Weight (g, typ.) 107 f
Environmental (operating)
Ambient temperature -20° to 85° C 0o to 60o C
Relative humidity (non-condensing) 5% to 90% f
Shock (half-sine wave) 250G (2ms) f
Vibration (sine wave) 1G (22-500Hz) f
Environmental (non-operating)
Ambient temperature -40° to 85° C f
Relative humidity (non-condensing) 5% to 90% f
Shock (half-sine wave) 800G (1ms) f
Vibration (sine wave) 5G (22-500Hz) f
Acoustics (A-weighted sound power)
Idle (Bels, typ.) 2.4 f
Op (Bels, typ.) 3.0 f
1 One GB is equal to one billion bytes when referring to hard drive
capacity. Accessible capacity may be less.
2 Portion of buffer capacity used for drive firmware.
3 Intended for less than 20 percent duty cycle industrial applications
and other non mission critical applications.
