Seagate U-series 20GB HDD 3.5" Ultra-ATA/100

20GB HDD, DMA/ATA-100 (Ultra), 5400Rpm

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The U Series family of disc drives is now available in capacities of up to 80 Gbytes. This generation of U Series drives offers the best combination of performance, acoustics and reliability. Idling at just 2.9 bels, U Series is one of the quietest drives available. And with Seagate's exclusive 3D Defense, no other drive provides more to protect end-users' data. Count on U Series drives for reliable performance in PCs, consumer electronics devices, and industrial applications.

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Features
Bytes per sector	512
Average latency	5.55 ms
Average seek time	8.9 ms
Track to track seek time	2 ms
Full stroke seek time	24 ms
Read seek time	9.9 ms
Write seek time	10.9 ms
HDD number of heads	1
Storage drive buffer size	2 MB
Type	HDD
Interface	Ultra-ATA/100
HDD speed	5400 RPM
HDD capacity	20 GB
HDD size	3.5"

Power
Start-up current	2.5 A
Operating voltage	5 / 12 V
Power consumption (read)	7.5 W
Power consumption (write)	7.5 W
Power consumption (idle)	5 W
Power consumption (standby)	1.2 W
Power consumption (typical)	7.5 W

General
Product family	U-series

Operational conditions
Non-operating shock	350 G
Operating shock	63 G
Non-operating altitude	-121.92 - 12192 m
Operating altitude	-60.96 - 3048 m
Non-operating vibration	5 G
Operating vibration	0.5 G
Storage relative humidity (H-H)	5 - 95%
Operating relative humidity (H-H)	5 - 90%
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 60 °C

Weight & dimensions
Weight	680 g
Height	26.1 mm
Depth	147 mm
Width	101.8 mm