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Does the suspend process in Ubuntu (12.04) unmount the partitions on the external hard drive, and what happens if I unplug the external hard drive and resume without it plugged in?

Are there any other risks around this I should be aware of?

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This is offtopic in AskUbuntu. Please consider asking this question in or – NlightNFotis Sep 20 '12 at 11:01
I'm pretty sure that Ubuntu does not unmount the drives - but I think it does flush the cache first. (not an answer as I'm unsure) – NRoach44 Sep 20 '12 at 11:01
Thou shalt not play with your hardware while thyst power is on. – January Sep 20 '12 at 11:13
@NlightNFotis, I don't see why this is off topic on AskUbuntu as the question depends on the OS. Anyways, this is definitely off topic on ServerFault where you are suggesting the OP to move the question. – laurent Sep 20 '12 at 11:54
@NLightNFotis: if he asked here he is certainly running Ubuntu on his machine... I don't think it is necessary for him to say that or tag it (all questions here should be tagged ubuntu?), please don't forget AU is linked in Ubuntu site as a support place. His question depends on the OS too, not only hardware because what happens when you suspend depends on what the OS do. I agree it is related to hardware sites too but it is NOT off topic on AU in my opinion. – laurent Sep 20 '12 at 14:14
up vote 3 down vote accepted

Ubuntu will not unmount the drive, even this one or any other, and if you unplug it and boot the system up later if you try to access it an error will occur, and you might lose some data, by corruption.

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