Is that a built-in function on the HDD or Windows 10?

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  1. Matthew Wai's Avatar
    Posts : 5,104
    Windows 10 Home 20H2
       #1

    Is that a built-in function on the HDD or Windows 10?


    When My Passport Essential has been left idle for almost 20 minutes, the disk will stop rotating, and it will start rotating again when I read files on it.
    Is that a built-in function on the HDD or Windows 10?
      My Computer

  2. Berton's Avatar
    Posts : 10,550
    Win10 Pro Versions 2004 and 2009/20H2, Win10 Pro IP_Dev, Win10 Home 1909
       #2

    Both of mine do the same, a 750GB and 1TB models. I believe it's simply a power saving feature, not a problem for me as they do not contain an Operating System, don't need the same instant access as the OS.
      My Computers

  3. Matthew Wai's Avatar
    Posts : 5,104
    Windows 10 Home 20H2
    Thread Starter
       #3

    Berton said:
    I believe it's simply a power saving feature
    So do I, but is it a feature of Windows 10? I have not installed any drivers/software of the HDD.
      My Computer

  4. Wiley Coyote's Avatar
    Posts : 1,097
    Windows 10 Home x64 Version 1809 (OS Build 17763.437)
       #4

    Could be Windows is set to shut it down for Energy Savings. Check it's properties in Device Manager:

    Is that a built-in function on the HDD or Windows 10?-capture.png

    My WD Elements External Drive has it's own power supply so I don't have that issue.

    Good luck...
      My Computer

  5. Matthew Wai's Avatar
    Posts : 5,104
    Windows 10 Home 20H2
    Thread Starter
       #5

    'Allow the computer to turn off this device to save power' is disabled at my end.
    I have never changed this setting before, so it must be the default.
      My Computer


  6. Posts : 1,212
    Windows 10 Pro
       #6

    This has been an OS feature for a long time. But some drives will power down independently of the OS, often with option to change the behavior.
      My Computer

  7. Bree's Avatar
    Posts : 18,744
    10 Home x64 (20H2) (10 Pro on 2nd pc)
       #7

    Matthew Wai said:
    ... but is it a feature of Windows 10?
    Most likely a feature of the drive itself. I have a USB HDD plugged into the USB socket on my router so that it can be shared on the network. That too stops spinning when not in use.
      My Computers

  8. swarfega's Avatar
    Posts : 7,088
    Windows 10 Pro 64-bit
       #8

    You could try setting this:

    Is that a built-in function on the HDD or Windows 10?-hdpowersetting.png
      My Computers

  9. Kari's Avatar
    Posts : 17,434
    Windows 10 Pro
       #9

    Power Options > Edit Plan Settings > Change advanced power settings:

    Is that a built-in function on the HDD or Windows 10?-image.png

    When enabled, external hard disks will disconnect when idle.
      My Computer

  10. Bree's Avatar
    Posts : 18,744
    10 Home x64 (20H2) (10 Pro on 2nd pc)
       #10

    Some figures to demonstrate that an external USB HDD is quite capable of powering itself down while not being accessed without any help from a Windows OS. This is the S.M.A.R.T. info for a USB HDD that was plugged into my router (so no Windows system controlling it) 24 hours a day for well over two years. Compare the (09) Power-On Hours with the (DE) Loaded Hours. You will see that for 95% of its life it was in standby. Contrast that with my laptop's HDD, where the Loaded Hours are 82% of the Power-On Hours.

    Is that a built-in function on the HDD or Windows 10?-power-hours.png

    Oh, and the reason I replaced it? Well the Current Pending Sector Count is entirely due to my carelessness. I dropped it while it was spinning and the heads hit the platter with a loud 'ping'.
      My Computers


 
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