Harddrive power management

Seagate Barracuda 7200 1 TB 7200RPM SATA 3Gb/s 32MB Cache 3.5 Inch Internal Hard Drive ST31000528AS-Bare Drive



http://www.amazon.com/Seagate-Barracuda-7200RPM-Internal-ST31000528AS-Bare/dp/B00272NHOK

Each seagate Barracuda family hard drive of 1T will consume about 5W when idle and 9W when working.

A Widows home server with Atom d525 CPU and 3 1T hard drive will likely consume about 40Wat to 50Wat.

  • Startup Current +12 Peak(A, ±10%): 2.0
  • Seek, Average (W): 7.3
  • Operating, Average (W): 9.4
  • Idle, Average (W): 5.0


 

Seagate Barracuda XT 2 TB 7200RPM SATA 6 Gb/s 64MB Cache 3.5 Inch Internal Bare Drive ST32000641AS



  • Startup Current +12 Peak(A, ±10%): 2.8
  • Seek, Average (W): 7.3
  • Operating, Average (W): 9.23
  • Idle, Average (W): 6.39

Western Digital Caviar Green 3TB Review (WD30EZRSDTL)

This is a complete review of the 3TB drive. It is about 240$ per drive, or $80 per TB. The power saving over 3 drives of 1T is quite impressive

WD Caviar Green 5th Generation Specs

  • 2.5TB and 3TB capacities
  • 5400 RPM
  • 64MB cache
  • 3Gb/s SATA
  • Power Consumption
    • Spin Up - 10.75W
    • Seek - 6.25W
    • Idle - 5.5W
    • Standby - 1W
  • Average Read Seek - 15ms
  • Average Latency - 5.5ms
  • Spindle Start Time - 17s
  • Error Rate - <1 in 1015

Pros

  • Huge 3TB capacity
  • Speed increases over the 2TB model
  • Lower write, idle, and startup power consumption
  • As bleeding edge as it gets for computer storage for now

Cons

  • Compatibility will be an issue for some until systems meet UEFI standards
  • Significantly higher price per GB over 2TB model

Easystore H342 does not support the 3T hard drive according to this link

This blog explains the reason why there is a 2T limitation for each drive and how to get around the limitation

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