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    Hitachi Ultrastar 500GB Enterprise 3.5" SATA 3.0Gb/s 32MB Cache
      Mã sản phẩm: HUA722050CLA330

      Hitachi Ultrastar 500GB Enterprise 3.5" SATA 3.0Gb/s 32MB Cache

    Model(s) Standard Models
    HUA722020ALA330
    HUA722010CLA330
    HUA722050CLA330
    BDE models
    HUA722020ALA331
    HUA722010CLA331
    HUA722050CLA331
    Interface 3Gb/s SATA
    Capacity (GB) 2TB/1TB/ 500
    Sector size (variable, Bytes/sector) 512
    Max areal density (Gbits/sq. in.) 2TB 285
    <2TB 352
    Performance
    Data buffer (MB) 32
    Rotational Speed (RPM) 7200
    Interface transfer rate (MB/sec, max) 300
    Sustained transfer rate (MB/sec, typ.) 134
    Seek Time (read, ms, typical) 2TB 8.2
    <2TB 8.5
    Reliability
    Error Rate (non-recoverable, bits read) 1 in 10^15
    MTBF (M hours) 1,200,000
    Load/Unload Cycles 300,000 (at 40ºC)  
    Availability (hrs/day x days/wk) 24x7**
    Acoustics
    Idle (Bels) 2TB 2.9
    <2TB 2.4
    Power
    Requirement +5 VDC (+/-5%)
    +12 VDC (+10%/-8%)
    Requirement: Start-up (W, peak, max) 2.0 (+12V), 1.2 (+5V)
    Requirement: Read/Write (W, avg) 2TB 11.1 <2TB 8.4
    Operating (W, typical) 2TB 11.1
    <2TB 8.4
    Unload idle (W) 2TB 5.6
    <2TB 3.9
    Power consump. efficiency index (W/GB) 0.0028 / 0.0039 / 0.0078
    Physical size
    Z-height (mm) 26.1
    Dimensions (width x depth, mm) 101.6(+/-0.25) x 147
    Weight (g, max) 2TB 740 <2TB 680
    Environmental (operating)
    Ambient temperature 5º to 60ºC
    Shock (half-sine wave) 70
    Vibration 0.67(XYZ)(G RMS 5 to 500Hz)
    Environmental (non-operating)
    Ambient temperature -40º to 70ºC
    Shock (half-sine wave) 2TB 300
    <2TB 350

    Capacity GB - One GB is equal to one billion bytes and one TB equals 1,000 GB (one trillion bytes) when referring to hard drive capacity. Accessible capacity may be less.
    Availability - Intended for use in lower duty cycle environments in the enterprise storage hierarchy, such as RAID and nearline applications. This MTBF target is based on a sample population and is estimated by statistical measurements and acceleration algorithms under nominal operating conditions. MTBF ratings are not intended to predict an individual drive’s reliability. MTBF does not constitute a warranty.
    Data Buffer MB - Portion of buffer capacity used for firmware Seek Time - Excludes command overhead

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