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Windows 7: "Safely remove" drive before hibernation?

16 Feb 2016   #1
Alonzo Poodle

Windows 7 Home Premium 64-bit SP1
 
 
"Safely remove" drive before hibernation?

Do one have to "safely remove" (with that icon in the system tray) a drive (e.g. an external USB hdd) before hibernation? Or can one plug the plug off when / while the computer / Notebook hibernates?


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16 Feb 2016   #2
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

It would be very smart to, it may show up as unallocated one day

You should only be hooking up an external when you`re using it, there is no reason to have it hooked up any other time.
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16 Feb 2016   #3
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

Hi,
I usually just shutdown to connect and disconnect external hdd's in an enclosure
About the safest way in win-7 there is.
Flash drives I'll use safe to remove option.
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16 Feb 2016   #4
LMiller7

Windows 7 Pro 64 bit
 
 

I agree with AddRAM

When a computer goes into hibernation the contents of RAM is saved to disk. This includes portions of the disk that may be in the file cache. It is critical that this cached copy remains in sync with the data on the drive or results are unpredictable, but generally unpleasant. With a local disk it is difficult to be otherwise. Normally Windows will flush the cache of removable drives before hibernation. The problem is that sometimes removable drives do not get recognized as such and then you have a potentially serious problem. If you use the safe removal procedure the cache will be flushed properly and no problems should occur.
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17 Feb 2016   #5
rubyrubyroo

MS Windows 7 Home Premium SP1 64-bit (Family Pack Lic.) Upgrade
 
 
Hear! Hear!

I agree with AddRAM & for precisely the reason that LMiller7 has described!

(I can't say I always practice what I preach though, I've often done what ThrashZone suggests but it's a "BIG FAT do it @ your own risk scenario. Unwise if you have important data stored on it - and what else, pray tell, would one have on such a drive? Hmm..) ....Now that's a real thinker!
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17 Feb 2016   #6
Alonzo Poodle

Windows 7 Home Premium 64-bit SP1
 
 

Many thanks.

Quote:
It would be very smart to, it may show up as unallocated one day
So that is the answer to my first question. It sounds very frightening, it really can be like that (after hibernation)?

Quote:
I usually just shutdown to connect and disconnect external hdd's in an enclosure
But it might be a bit inconvenient and if you need the computer kept running not possible.

Very often it is not possible to remove a drive safely, a message is often shown saying either an unknown error occurred the drive cannot be removed or some process is accessing it. But I cannot find any process accessing the drive, e.g. "Unlocker" does not show any. And if shutting down the computer is not possible at the moment...

Quote:
When a computer goes into hibernation the contents of RAM is saved to disk. This includes portions of the disk that may be in the file cache. It is critical that this cached copy remains in sync with the data on the drive or results are unpredictable, but generally unpleasant. With a local disk it is difficult to be otherwise. Normally Windows will flush the cache of removable drives before hibernation. The problem is that sometimes removable drives do not get recognized as such and then you have a potentially serious problem. If you use the safe removal procedure the cache will be flushed properly and no problems should occur.
Sorry, I do not understand, if an external drive is not recognized (as such) why is it accessible?

Actually I would have thought according to the default settings (deactivated cache on the external drives) (screenshot) something like that, data loss, cannot / should not happen.



All of what is being said here applies to Win 10 also?
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17 Feb 2016   #7
LMiller7

Windows 7 Pro 64 bit
 
 

Quote:
Sorry, I do not understand, if an external drive is not recognized (as such) why is it accessible?
I meant that sometimes a external drive gets recognized as an internal drive and not as an external. This is usually a driver issue.

The screenshot refers to the drives internal cache, not the system file cache which is usually much larger. This must remain consistent with the data on the drive or results are unpredictable.

The basic principles of hibernation haven't changed since it was introduced so everything said applies to all versions.

I don't have a great deal of experience with hibernation but I do understand how it works quite well and the potential dangers. This isn't apparent to the user but the details of hibernation are really very complex.
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17 Feb 2016   #8
Alonzo Poodle

Windows 7 Home Premium 64-bit SP1
 
 

Quote:
I meant that sometimes a external drive gets recognized as an internal drive and not as an external. This is usually a driver issue.
I understand, I have never encountered such a problem.

Quote:
The screenshot refers to the drives internal cache, not the system file cache which is usually much larger. This must remain consistent with the data on the drive or results are unpredictable.
I am not quite sure, the text says "deactivates the writing cache of the drive and in Windows" and "the drive can be removed without using the icon 'safely remove'".

Quote:
I don't have a great deal of experience with hibernation but I do understand how it works quite well and the potential dangers. This isn't apparent to the user but the details of hibernation are really very complex.
Yes, I could imagine that. What are the "potential dangers"?

Many thanks
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17 Feb 2016   #9
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

I personally have no need to leave a machine on 24/7... so shutdown works for me
Startup times are pretty good too and a small inconvenience that does a more effective job with external drives as described by them being confused with internal drives

I get used to it I have a dual ssd evo hot swap device so I switch ssd's with operating system on it fairly often as a safer way to dual boot.
Amazon.com: Vantec 2.5-Inch Dual Bay Trayless SATA III - 6G Mobile Rack (MRK-225S6-BK): Computers & Accessories
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17 Feb 2016   #10
Alonzo Poodle

Windows 7 Home Premium 64-bit SP1
 
 

I understand, thank you for the link.
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 "Safely remove" drive before hibernation?




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