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250GB External USB 2.0 Hard Drive
Name: 250GB External USB 2.0 Hard Drive; 536292
Drivers:

Natively supported by Windows XP, Windows 2000, and Windows Me
Windows 98 Driver

Support Documentation: Windows 98 Driver Installation
Product Specifications:  

Features:  
  - Connects a 3.5" hard disk easily to a USB 2.0 Hi-speed port;
- Supports Hi-Speed USB data transfer speed of up to 480Mbps
- Fully USB 1.1 backwards compatible
- USB Mass Storage Class offers native support in Windows XP, 2000 and ME
- Supports most 3.5" HDD, and ultra high capacity HDDs larger than 137GB
- External power supply and internal fan maintain cool operation
- Portable data system, easy to connect by plug-and-play, hot swappable
- Includes an Advanced Shock Absorber System Protection.
Enclosure Specifications:  
Bus Interface USB 2.0
Compliance USB 2.0 EHCI Based, USB 2.0 compliant
Data Speeds 1.5/12/480 Mbps
Connector USB B connector
Internal IDE Interface 3.5” ATA-66/100/133 Hard disk drive
HDD Support Standard 3.5" IDE HDD, without limitation of 137GB
Power Supply 12V/1.7A output, switching AC/DC power adapter
Dimension of Enclosure 215 mm (L) x 130 mm (W) x 37 mm (H)
Drive Specification: Western Digital 250G Byte, model 2500BB
Rotational Speed 7,200 RPM (nominal)
Buffer Size 2 MB
Average Latency 4.20 ms (nominal)
Contact Start/Stop Cycles 50,000 minimum
Seek Times (Average)  
Read Seek Time (Average) 8.9 ms
Write Seek Time (Average) 10.9 ms (average)
Track-To-Track Seek Time 2.0 ms (average)
Full Stroke Seek 21.0 ms (average)
Transfer Rates:  
Buffer To Disk

 

748 Mbits/s (Max)
Buffer to Host (EIDE)
Mode 5 Ultra ATA 100.0 MB/s
Mode 4 Ultra ATA 66.6 MB/s
Mode 2 Ultra ATA 33.3 MB/s
Mode 4 PIO 16.6 MB/s
Mode 2 multi-word DMA 16.6 MB/s
General:  
Cylinders 16,383
Number of Heads (Logical) 16
Number of Heads (Physical) 6
Sectors Per Track 63
Formatted Capacity 250,059 MB
Capacity 250 GB
Interface EIDE
Actuator Type Rotary Voice Coil
Number of Platters 3
Bytes Per Sector 512
User Sectors Per Drive 488,397,168
Servo Type Embedded
Physical Dimensions:  
Height 1.028 Inches (Max)
Length 5.787 Inches (Max)
Width 4.00 Inches (+/- 0.010 inch)
Weight 1.32 Pounds (+/- .10 lb)
Temperature:  
Operating 41° F to 131° F
Non-operating -40° F to 149° F
Voltage and Current Requirements:  
12 VDC Read/Write 430 mA
Idle 400 mA
Standby 20 mA
Sleep 20 mA
5 VDC Read/Write 730 mA
Idle 680 mA
Standby 190 mA
Sleep 85 mA
Power Dissipation:  
Read/Write 8.85 Watts
Idle 8.30 Watts
Standby 1.20 Watts
Sleep 0.70 Watts

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