Travelstar DHAA
Product description

Models: DHAA-2270, DHAA-2405 and DHAA-2540

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
• ECC on the fly
  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
• 1, 7 run length limited (RLL) code
• All axis (6 directions) mounting
• No preventive maintenance

Configuration

  Interface                          IDE
  Formated capacity                  270/405/540 MB *1
  Sector size                        512 Bytes
  Sectors / track (logical)          63
  Head number (logical)              16
  Cylinder number  (logical)         524/785/1047
  Customer usable data sectors       528,192/791,280/1,055,376
  Disks                              1/2/2
  Recording zones                    8
  Areal density average (max)        493 Mb/sq.in.
  Recording density (max)            93.1 KBPI
  Track density                      5300 TPI


Performance

  Rotational speed                   3800 RPM
  Media transfer rate                24.9 - 36.0 Mbits/sec
  Data buffer                        Read buffer 32 KB
                                     Write cache 32 KB
  Interface transfer rate (max)      8.3 MB/sec
  Latency average                    7.9 msec
  Seek time (typical)
    Average (read)                   14 msec
    Track to track                   4.0 msec
    Full track (read)                23 msec
  Spin up (typical)                  2.7 sec


Power

  Requirements                         +5 VDC +/-5% *2
  Power supply ripple (0-20 Mhz) max   100 mV p-p *3
  Dissipation (typical)
    Idle                               0.24 A RMS
    Read/Write                         0.56 A RMS
    Seek                               0.40 A RMS
    Shutdown                           0.08 A RMS
    Start up (average to ready)        0.70 A RMS
    Start up (maximum peak)            0.94 A RMS
  Supply rise time                     7 - 100 msec


Physical size

  Height                             17 mm
  Width                              70 mm
  Depth                              100 mm
  Weight                             180 g


Environmental characteristics

  Altitude
    Operating                            -300 to 3000 m
    Ship / store                         -300 to 12000 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
    Relative humidity  (non-condensing)   8% to 90%
    Maximum wet bulb   (non-condensing)   29.4 C
    Shock *5           (half-sine wave)   20 G / 2 msec
    Vibration random   (RMS)              0.67 G (5-500 Hz)

  Non-Operating
    Relative humidity  (non-condensing)   5% to 95%
    Maximum wet bulb   (non-condensing)   40 C
    Shock *6           (half-sine wave)   250 G / 2 msec
    Vibration random   (RMS)              1.04 G (2-200 Hz)
 

Notes:

1. 1 MB = 1000000 bytes
2. The drive shall not incur damage for an over voltage condition of +25% (maximum duration of 20ms) on the 5 V nominal supply.
3. The maximum supply ripple is measured at the 5 V input on the drive.
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, below 60 C.
5. The drive will withstand, with no hard error, a 20 G half-sine wave shock pulse for a 2 ms 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 60 G half-sine wave for a 3.5 ms duration.
6. The drive will withstand, with no permanent damage or degradation in performance, a 120 G half-sine wave shock pulse of 11 ms duration or 250 G for 2 ms.