Model: DPRA-20810 and DPRA-21215

Features

• Magneto resistive heads
• No-ID physical format
• Closed loop actuator servo (embedded sector servo)
• PIO data transfer - mode 3
• DMA data transfer
  Single word mode - mode 2
  Multiword mode - mode 1
• Interleave factor 1:1
• Enhanced ECC implementation
  128 bit reed solomon code operating 10-bit symbol
  Multi-burst on-the-fly correction (up to 4 symbols in a sector)
• Automatic retry on errors
• Self diagnostics during power on
• Power saving modes
• All axis (6 directions) mounting
• No preventive maintenance

 Configuration

  Interface                       IDE
  Formated capacity               810/1215 MB *1
  Sector size                     512 bytes
  Sectors / track (logical)       63
  Head number (logical)           16
  Cylinder number (logical)       1572/2358
  Customer usable data sectors    1,584,576/2,376,864
  Disks                           2/3
  Recording zones                 8
  Areal density average (max)     700 Mb/sq.in.
  Recording density (max)         110.3 Kbpi
  Track density (max)             6350 TPI

Performance

  Rotational speed                4900 RPM
  Media transfer rate             36.3(id),57.0(od) Mbits/sec
  Data buffer                     read buffer 32 KB
                                  write cache 32 KB
  Interface transfer rate (max)   10 MB/sec
  Latency average                 6.1 msec
  Seek time (typical)
    Average (read)                12 msec
    Track to track                4 msec
    Full track (read)             23 msec
  Spin up (typical)               3.0 sec

Power

  Requirements                    +5 VDC  *2
  Power supply ripple (0-20 Mhz)  100 mV p-p max *3
  Dissipation (typical)
    Idle (ave)                    1.3 Watts   0.26 A RMS
    Read/write                    2.6 Watts   0.52 A RMS
    Seek (ave)                    2.6 Watts   0.52 A RMS
    Shutdown                      0.1 Watts   0.02 A RMS
    Start up (average to ready)   3.5 Watts   0.70 A RMS
    Start up (maximum peak)       4.7 Watts   0.94 A RMS
  Supply rise time                7 - 100 ms

Physical size
  Height                          17.0 mm
  Width                           69.85 mm
  Depth                           100.2 mm
  Weight                          186 g (max)

Environmental characteristics

  Altitude
    Operating                           -300 to 3,000 m
    Ship / store                        -300 to 12,000 m

  Temperature *4
    Operating                            5 to 55 C
    Storage                              0 to 65 C
    Shipping                            -40 to 65 C
    Temperature gradient (max)           20 C / hour
      (Operating, storage or shipping)

  Operating
    Ambient temperature                  5 to 55 C
    Relative humidity (non-condensing)   8 to 90 %
    Maximum wet bulb  (non-condensing)   29.4 C
    Shock *5          (half-sine wave)   100 G / 2 msec
    Vibration random  (RMS)              0.67 G (5-500 Hz)

  Non-operating
    Ambient temperature                 -40 to 65 C
    Relative humidity (non-condensing)   5% to 95%
    Maximum wet bulb  (non-condensing)   40 C
    Shock *6          (half-sine wave)   300 G / 2 msec
    Vibration random  (RMS)              1.04 G (2-200 Hz)

Notes:

1. 1 MB = 1,000,000 bytes
2. The drive shall not incur damage for an over voltage condition of +25% (maximum duration of 20 ms) on the 5 V nominal supply.
3. The maximum supply ripple is measured at the 5 V input on the HDD.
4. The system is responsible for providing sufficient air movement to keep the surface temperature , measured at the center of the drive's top cover.
5. The drive will withstand a 100 G half-sine wave shock pulse for a 2 msec duration. The drive will experience no data loss or permanent damage during idle, seek or read modes when experiencing no more than a shock pulse of 100 G half-sine wave for a 2 ms duration.
6. The drive will withstand, with no permanent damage or degradation in performance, a 300 G half-sine wave pulse of 2 ms duration.