ST-250/8M-WD2500AAJB

Western Digital Caviar SE 250GB 7200rpm EIDE 100MB/s 8MB Hard Drive Internal)

Cool, quiet and fast. WD Caviar SE drives offer superior performance and reliability, making them ideal for business and family desktops.

How this WD hard drive protects your data: Data Lifeguard is an exclusive set of data protection features, including shock protection, an environmental protection system and real-time embedded error detection and repair. WD's Data Lifeguard technology automatically finds, isolates, and repairs problems that may develop over the life of a hard drive. Data Lifeguard Tools are software utilities designed for WD hard drives that work with the embedded Data Lifeguard features to make hard drive installation,diagnostics and repair both simple and worry-free. (Download Data Lifeguard Tools). ShockGuard instantaneously protects the hard drive against damage from bumps and vibrations while it is running. This technology enables WD Caviar drives to achieve industry-leading shock specifications.

  • Western Digital Caviar Hard Disk Drive
  • Capacity: 250 GB
  • Rotational Speed: 7,200 RPM
  • Buffer Size: 8 MB
  • Average Latency: 4.20 ms
  • Start/Stop Cycles: 50,000 minimum
  • Read Seek Time: 8.9 ms
  • Write Seek Time: 10.9 ms
  • Buffer To Disk: 972 Mbits/s (Max)
    • Hard Disk
    Disk Capacity 250 GB
    Disk Speed 7200 RPM
    Data Buffer 8192 KB
    Performance
    Average Seek Time Read: 8.9ms • Write: 10.9 ms
    Seek Time (full track) 21 ms
    Seek Time (Track to Track) 2.0 ms
    Average Latency 4.20 ms
    Interfaces/Ports
    Interface EIDE 100 MB/s Interface Type(s) EIDE
    CPU
    Processor ( ) (L1 Cache) (L2 Cache)
    Electrical
    Power Requirement Spin Up (Max) 8.7 Watts
    Power Requirement Idle (Ready) 8.4 Watts
    Environmental
    Acoustics (Seek Mode) 29 dB
    Acoustics (Idle Mode) 28 dB
    Operating Temperature 0 to 60 °C
    Non Operating Temperature -40 to 65 °C
    Relative Humidity 5 to 95 %
    Vibration (Operating) Linear: 20-300 Hz, 0.75 G (0 to peak) • Random: 7-500 Hz (0.00221 g/2 / Hz)
    Vibration (Non-Operating) Low Frequency: 10-300 Hz, 0.195 inches (double amplitude) • High Frequency: 300-500 Hz, 5.0G (0 to peak)
    Shock (Operating) 65Gs for 2ms
    Shock (Non Operating) 350G for 2ms
    Altitude (Operating) -305 to 3,050 m
    Altitude (Non-Operating) -305 to 12,200 m
    Physical
    Form Factor Hard Disk Drive
    Enclosure type Internal
    Dimensions 10.1 cm (W) x 14.7 cm (D) x 25.4 cm (H) - Weight 0.63 kg