2.5 inch ATA-5 hard disk drives
Capacities: 20, 30, 40, & 60 GB.
Hitachi Travelstar DK23EA /DK23EB
hard disk drives
Highlights
20,30,40 or 60 GB 4200 RPM in 9.5mm high package for maximum capacity slimline portable applications
20 and 40 GB 5400 RPM in 9.5mm high package for applications that require increased performance
250G/2ms operating shock
ATA-5 interface with 2048kB read/write cache
Ultra DMA mode 5 (100 MB/s max.)supported
GMR head and ME2PRML read channel technology
3-bit RISC microprocessor, shock sensor, S.M.A.R.T.
Fluid Dynamic Bearing Motors for improved acoustic
and shock characteristics
Hitachi Travelstar DK23EA and DK23EB hard disk drives specifications
Product name Travelstar DK23EA Travelstar DK23EB
Model number DK23EA-60, DK23EA-40, DK23EB-40, DK23EB-20
DK23EA-30, DK23EA-20
Performance
Interface ATA-5 ATA-5
Capacity (GB) 60/40/30/20 40/20
Sector size (bytes) 512 512
Number of cylinders 42,0091 42,091
Disks 2/2/1/1 2/1
Data heads 4/3/2/2 4/2
Seek Time (nominal)
1 track (ms) 3 3
Average (ms) 13 13
Full track (ms) 24 24
Average latency (ms) 7.1 5.6
Rotational speed (RPM) 4,200 5,400
Read technology ME
Internal transfer rate (MB/s) 22.1 –42.8/19.4 –37.1/22.1 –42.8/19.4-37.1 27.8 –44.1
Recording density (Max.(Mtpm)) 28.6/25.4/28.6/25.54 24.1
Track density (Mtpm) 2.76 2.48
Interface transfer rate 100MB/sec Ultra DMA mode-5 100MB/sec Ultra DMA mode-5
16.6MB/sec PIO mode-4 16.6MB/sec PIO mode-4
Data buffer (MB)
1
2 2
Physical size
Height (mm) 9.5 9.0
Width (mm) 70 70
Depth (mm) 100 100
Weight (g) 95/95/91/91 95/91
Power
Requirement +5VDC(±5%) +5VDC(±5%)
Dissipation (typical)
Seek (max. peak) 0.45 0.45
Spin up (average) 0.90 0.90
Idle (average) 0.14 0.17
Read/Write (average) 0.40 0.42/0.40
Sleep (average) 0.02 0.02
Stand-by (average) 0.03 0.03
Temperature
Operating 5° to 55° C (41° to 131° F) 5° to 55° C (41° to 131° F)
Non-operating -40° to 70° C (140° to 158° F) -40° to 70° C (140° to 158° F)
Reliability
Error rate (non-recoverable) < 1 per 1013 bits transferred < 1 per 1013 bits transferred
Preventive Maintenance Non required Non required
Environmental characteristics
Relative humidity
Operating 5% - 90% 5% - 90%
Non-operating 5% - 95% 5% - 95%
Maximum wet bulb (non-condensing)
Operating 29° C (84.2° F) 29° C (84.2° F)
Non-operating 40° C (140° F) 40° C (140° F)
Shock (half sine wave)
Operating 2,450m/s
Non-operating 7.840m/s
Vibration
Operating 1G (22 - 500Hz) 1G (22 - 500Hz)
Non-operating 5G (22 - 500Hz) 5G (22 - 500Hz)
Acoustic noise (Bels)
Idle (typical) 2.4 2.8
Seek 3.1 3.1
2
PRML, ID-less format ME2PRML, ID-less format
2
(250G)or less (2ms) 2,450m/s2 (250G)or less (2ms)
2
(800G) or less (2ms) 7.840m/s2 (800G) or less (2ms)
Hitachi Global Storage Technologies
For more information
Internet and e-mail:
• www.hgst.com
• N. America: support_usa@hgst.com
• EMEA: support_uk@hgst.com
• Asia Pacic: support_ap@hgst.com
Hitachi hard drive product information:
• US: 1 888 426-5214
• For a complete list of worldwide phone
numbers, visit www.hgst.com/support
© Copyright Hitachi Global Storage Technologies 2003
Hitachi Global Storage Technologies
5600 Cottle Road
San Jose, CA 95193
Produced in the United States
5/03, revised 7/03
All rights reserved
1
Space reserved for firmware
TravelstarTM is a trademark of
Hitachi Global Storage Technologies.
Other product names are trademarks or registered
trademarks of their respective companies.
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are trademarks of Hitachi Global Storage Technologies.
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Technologies products, programs or services do not
imply that Hitachi Global Storage Technologies intends
to make these available in all countries in which Hitachi
Global Storage Technologies operates.
Product information is provided for information purposes only and does not constitute a warranty.
Information is true as of the date of publication and is
subject to change. Actual results may vary.
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Photographs may show design models.