Question How to disconnect external hard drives when pc is hung/frozen?

gamepadx

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May 18, 2014
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I am currently recovering data from a 1TB toshiba internal hard drive (that's connected via a USB external casing and a power supply adapter ), with the help of testdisk from Parted Magic (v. May 2019) through a bootable 4GB pendrive (attached to a pc) and copying the recovered files to a WD My Passport 4TB, which is connected to the pc via a usb hub.

Last night, as the files were being copied via testdisk , I opened up some other programs in search of a wifi application and also ran a second instance of testdisk to recover some urgent files. Doing this caused the PC to freeze. The keyboard became unresponsive and while the cursor was moving via the mouse, it couldn't open or close anything, as if the mouse clicks were not being accepted by the system, and so I could not disconnect the hard drives.
(Could this have happened because there is no HDD connected via the motherboard? The task manager read the RAM correctly as 16GB).I left them on the way the way they were overnight, hoping that the freezing would resolve on it's own by the next day.

Checking this morning and the situation remains, and the mouse cursor has also become unresponsive. My only option left is to manually power down the pc. Will doing this hurt the two external hard drives? Would it be better to switch off the power supply of one of the toshiba casing and disconnect the My passport from the usb hub while the pc is on? Is there a better way to go about this?

Could really use your urgent help and advice.
 
recovering an HDD can really take a long time. Are you sure that the HDDs are not writing anymore? if not, just switch the PC of and on again
Is there a way to know if the hard drives are active? The My Passport HDD is blinking while the light of the external case of the toshiba HDD is stable.

If I touch the two drives, I can feel a faint vibration.
 
You can disconnect the drives. From the data side, you're just losing the last file the drive was trying to write to. From the hardware side, there usually isn't any risk of say a head crash because drives are designed to automatically park the head the moment power goes out, presuming USB was the only thing powering them. If they have external power, the drive will likely clean up the last operation it was doing (which still results in losing the last file), but it'll park the head eventually.
 
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Is there a way to know if the hard drives are active? The My Passport HDD is blinking while the light of the external case of the toshiba HDD is stable.

If I touch the two drives, I can feel a faint vibration.
The whirring just means the drives are one. If you hear light clicking and buzzing then that means it's writing.

I agree with the last post, you're just better off cutting power and restarting.
 
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