Hitachi Specifications
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Feature Description
Manufacturer Hitachi
Model HTS542525K9SA00
Physical layout
Bytes per sector 512
Number of heads 4
Number of disks 2
Logical layout
Number of heads 16
Number of sectors/track 63
Number of cylinders 16,383
Number of sectors 488,397,168
Total logical data bytes 250,059,350,016
Data
Rotational speed 5,400 RPM
Buffer size 8 MB
Data transfer rates (buffer to/from media) 665 Mbps
Data transfer rates 1.5 to 3.0 Gbit/sec
Recording density 1100 KBPI (maximum)
Track density 186 KTPI (maximum)
Areal density 205 Gbit/sq-inch (maximum)
Number of zones 24
Performance
Average Random Seek Time - Read 11 ms
Average Random Seek Time - Write 13 ms
Power-on-to-ready 3.5 seconds
Command overhead 1.0 ms
Disk-buffer data transfer 665 Mb/s
Buffer-host data transfer 1.5 to 3.0 Gbit/s
Average seek time Read: 11 seconds typical, 14 seconds maximum
Write: 13 seconds typical, 15 seconds maximum
Full stroke seek Read: 20.0 seconds typical, 25.0 seconds maximum
Write: 21.0 seconds typical, 26.0 seconds maximum
Single track seek time Read: 1.0 seconds typical, 2.0 seconds maximum
Write: 1.1 seconds typical, 2.2 seconds maximum
Average latency 5.5 ms
Drive ready time Power on to ready: 3.5 seconds typical
Power requirements
Nominal supply +5 Volt DC
Supply voltage -0.3 Volt to 6.0 Volt
Power supply ripple (0–20 MHz) 100 mV p-p maximum
Performance Idle average 1.7 watts
Active Idle average 0.8 watts
Low Power Idle average 0.55 watts
Read average 1.8 watts
Write average 1.8 watts
Seek average 2.2 watts
Standby 0.2 watts
Sleep .01 watts
Startup (maximum peak) 5.0 watts
Average from power on to ready 3.8 watts
Power Consumption Efficiency 0.0022 watts
Environmental
Operating conditions
  • Temperature: 5 to 55° C
  • Relative humidity: 8 to 90% noncondensing
  • Maximum wet bulb temperature: 29.4° C noncondensing
  • Maximum temperature gradient: 20° C/hour
  • Altitude: -300 to 3048 m (10,000 ft)
    • Non-operating conditions
  • Temperature: -40 to 65° C
  • Relative humidity: 5 to 95% noncondensing
  • Maximum wet bulb temperature: 40° C noncondensing
  • Maximum temperature gradient: 20° C/hour
  • Altitude: -300 to 12,192 m (10,000 ft)
    • Dimensions
  • Height: 0.37 inches (9.5 mm)
  • Width: 2.75 inches (69.85 mm)
  • Length: 3.94 inches (100.2 mm)
  • Weight: 3.28 ounces (102 grams) maximum