Hitachi 1TB 7K1000 Hard Drive

Posted on June 12, 2008
Author: Sean Potter
Pages: 1 2 3 4 5


ModelHitachi Deskstar 7K1000
Part Number0A35155
Capacity1 TB
Sector size512 bytes
InterfaceSerial ATA 3.0 Gb/s
Buffer Size32 MB
Rotational Speed7200 RPM
Media transfer rate (max)1070 Mb/s
Interface transfer rate (max)300 MB/s
Latency4.17 ms (average, 7200 RPM)
Seek time8.5 ms read (typical), 9.2 ms write (typical)
Silent-seek time14 ms read (typical), 15 ms write (typical)
Error rate (non-recoverable)1 per 1.0 E15 bits transferred
Load/unload cycles (at 40?)50,000
Power Supply+5 VDC (+/- 5%), +12 VDC (+10% / -8%)
Start up current (max)2.0 A (+12V), 1.2 A (+5V)
Acoustics (A-weighted sound power)Idle: 2.9 bels (typical)
Acoustics (A-weighted sound power)Silent seek, Seek: 3.0 bels (typical), 3.2 bels (typical)
RoHS compliantyes
Warranty3 Years

With a whopping 5 platters and 10 read/write heads, the drive is definitely heavy. It may not compare to an ancient 5.25" hard drive, but I can feel the heft of this drive at 700g.


With the massive set of technical specifications found for this drive, I expected a decent set of features. This is exactly what I found looking through Hitachi's website.

  • Storage capacities up to 1TB
  • Perpendicular magnetic recording technology
  • SATA 3.0Gb/s interface
  • Ramp load design increases shock protection and power savings
  • Thermal monitoring and fly height control enhance reliability
  • Three low-power idle modes boost power efficiency
  • Silent seek acoustics achieve ultra-quiet operation
  • Host/drive authentication for hardware security

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