Thanks for the trace. We will analyze and get back to you. We published a blog on this yesterday to bring awareness and get help from the community to root-cause the issue. We think this is all due to suspending the device when idle which we never used to do in previous OSes. We will find out if this turns out to be something else.
Windows 8.1 causes external hard drives to auto-sleep?
My 2 external hard drives are always active as I have disabled auto sleep. I didn't have this problem way since Windows 7, but after upgrading to Windows 8.1 from Windows 8, my 2 external hard drives will automatically went to sleep around 10 minutes of inactivity. I have tried the power options, device manager options, but to no avail. Any help? Thanks.
I'm using NoSleepHD as a temporary fix but I hope there's a permanent fix for this.
Windows for home | Previous Windows versions | Devices and drivers
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Anonymous
2014-10-15T22:06:07+00:00 I have the same problem with an Aegis Padlock Pro using the Surface Pro 3 - no power options for USB available. The drive sleeps in 1 -2 minutes and I have to re-enter the code on the drive to reconnect to the system.
Update
This solution using the referenced Powershell script solved my issue with the drive sleeping:
The update to windows referenced at the beginning was installed but the drive was still sleeping before I ran the Powershell script.
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Anonymous
2014-10-14T21:52:51+00:00 I have the same problem with an Aegis Padlock Pro using the Surface Pro 3 - no power options for USB available. The drive sleeps in 1 -2 minutes and I have to re-enter the code on the drive to reconnect to the system.
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Anonymous
2014-10-09T17:36:11+00:00 Any update on this? My SimpleTech external USB drive literally powers off and on every few seconds. It is attached to my Surface Pro 3, which does NOT have power options available for drives.
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Anonymous
2014-08-18T22:47:03+00:00 I think you don't have the usb settings etc. because you are using surface pro.On laptops it look likes this :)