[kwlug-disc] Why moving file in encrypted disk takes very long time?

[Bob Jonkman]

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Hi Raymond: Since it's a work computer you probably don't have
sufficient access to see anything. And even if you could, the
encrypted volume you see will hide the underlying structure anyway.

My guess is that the volume you see is joined from multiple
partitions, and when you're moving a file it's actually being copied
from one partition to another, and then being deleted.  And, although
modern CPUs are fast enough that on-the-fly encryption should be
unnoticeable, it's possible you're seeing the overhead when "move" =
"decrypt, copy, encrypt, decrypt, delete".

- --Bob.


On 2017-11-06 10:11 AM, Raymond Chen wrote:
> Now the hard disk of my company desktop is encrypted by Mcafee
> Disk Encryption. The file moving is terribly slow now, moving 10GB
> data to its parent folder takes forever. I understand file reading
> and writing are supposed to take longer, But why moving files?
> Shouldn't this just be a record change in file allocation table? It
> looks like it decrypts and re-encrypts all the files. That's a NTFS
> disk, it this the same for other file system like EXT4?
> 
> Raymond
> 
> 
> 
> _______________________________________________ kwlug-disc mailing
> list kwlug-disc at kwlug.org 
> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
> 

- -- 
Bob Jonkman <bjonkman at sobac.com>          Phone: +1-519-635-9413
SOBAC Microcomputer Services             http://sobac.com/sobac/
Software   ---   Office & Business Automation   ---   Consulting
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