Western Digital Caviar SE 120GB 7.2K EIDE Hard Drive WD1200JB

Availability:

30 in stock


479.00 د.إ

30 in stock

Western Digital Caviar SE 120GB 7.2K EIDE Hard Drive WD1200JB

Capacity: 120GB
Spindle Speed: 7,200RPM
Interface Type: IDE / ATA (3.5″)
Disk Size: 3.5″x1.0″ (LFF Hard Drive)
Sustained Throughput (MBps)
Average Seek Time (read/write ms): 8.9 / 10.9
Electrical Interface Speed: EIDE / Ultra ATA/100 – 100MBps
On-Board Cache: 8MB

Key Features

  • RAID-specific time-limited error recovery improves compatibility with RAID adapters, and prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop hard drives.
  • 1 million hours MTBF meets enterprise-class reliability standards.
  • Backed by an industry-leading five-year warranty.
  • 8 MB cache provides a higher percentage of cache hits and significantly faster time to data than industry-standard 2 MB versions
    Model:  WD1200JB   Specifications
    Formatted Capacity 120,034 MB 
    Interface 40-pin EIDE
    Actuator Type Rotary Voice Coil
    Number of Disks 2
    Data Surfaces 4
    Number of Heads 4
    Bytes Per SECTOR 512
    User SECTORS Per Drive 234,441,648
    Servo Type Embedded
    Recording Method EPR4 Rate 16/17 PRML
    ECC Reed Solomon
    Head Park 2 Automatic

     

    PRML – Partial Response Maximum Likelihood
    EIDE – Enhanced Integrated Drive Electronics

    2 Turning the system power off causes the WD Caviar® to perform an automatic head park operation.

     

    Performance Specifications
    Average Seek 1
    – Read
    – Write
    8.9 ms average
    10.9 ms average
    Track-to-Track Seek 2.0 ms average
    Full Stroke Seek 21 ms average
    INDEX Pulse Period 8.3 ms (nominal)
    Average Latency 4.2 ms (nominal)
    Rotational Speed 7200 RPM (nominal)
    Data Transfer Rate (maximum) 100 MB/s (Mode 5 Ultra ATA)
    66.6 MB/s (Mode 4 Ultra ATA)
    33.3 MB/s (Mode 2 Ultra ATA)
    16.6 MB/s (Mode 4 PIO)
    16.6 MB/s (Mode 2 multi-word DMA)
    Interleave 1:1
    Buffer Size 8 MB
    Error Rate – Unrecoverable <1 in 1014 bits read
    Spindle Start Time
    – From Power-on to Drive Ready 2
    – From Power-on to Rotational Speed 3
    7.0 s average 
    5.0 s average 
    Spindle Stop Time 6.5 s average
    Contact Start/Stop Cycles (CSS) 50,000 minimum

     

    1 When measuring seek times, the average latency must be subtracted from read, write, or explicit seek commands.
    2 Defined as the time from power-on to the setting of the Drive Ready and Seek Complete including calibration.
    3 Defined as the time from power-on to when the full spindle rotational speed is reached

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