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Drives will not spin down when DrivePool service is running



Hi, I am using a trial of the DrivePool and Scanner software.   I like the software and want to purchase it, but the only problem I am having is the hard drives will not spin down / go into standby mode when the DrivePool service is running.


I am using an external enclosure ( Mobius Pro 5C 5-Bay USB-C ) with 2 Western Digital Pro HDDs in it.  In windows settings just for testing I have it set to turn off hard disk after 1 minute.  I have tried various settings in the Scanner software but as long as the DrivePool service is running the hard drives will not go into standby.   When I disable the DrivePool service then they go into standby without any problem.   Any help would be appreciated.

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On 3/23/2021 at 4:28 PM, thebigMuh said:

To circumvent this, I changed the config file (C:\ProgramData\StableBit DrivePool\Service\Settings.json) to disable BitLocker support

Thank you for posting this. :)

I have been using Drivepool for two months now, with one internal SATA disk and two external USB disks in the pool. I too noticed that the USB disks seemed to be accessed continually. They are Western Digital "My Book" disks, and the disk LED:

  • Flashes rapidly when the disk is being accessed.
  • Remains constant when the disk is spinning but not being accessed.
  • Flashes slowly when the disk is spun down.

I noticed that the two USB disks were accessed briefly in unison every 3.5 seconds. After making the change that you suggested and then rebooting (need to "Run as Administrator" to make the change), I am pleased to report that the disks are now no longer accessed every 3.5 seconds -- the LEDs remain constant, or flash slowly. :)

In my experience USB disks don't obey the Windows "spin down" time in the power plan -- the USB disk controller decides for itself when to spin down the disk.

My suggestion: if Drivepool can determine that Bitlocker is not in use, Drivepool shouId automatically use the setting that you suggested.  If Drivepool cannot determine that Bitlocker is in use, the setting should be made available on the Drivepool "Settings" menu.

-- from CyberSimian in the UK


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I had the same problem (currently evaluating DrivePool version

After watching drive activity with filespy it seems like some interaction between DrivePool and the WMI Provider Host (WmiPrvSE.exe) is keeping the drives awake.

To circumvent this, I changed the config file (C:\ProgramData\StableBit DrivePool\Service\Settings.json) to disable BitLocker support, like this:

  "BitLocker_PoolPartUnlockDetect": {
    "Default": true,
    "Override": false

Now my drives sleep the way they should.


PS: Just noticed that this was quite the necro. It is however one of the top search results when looking for 'drivepool spin down', so I don't feel too bad.

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