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I have four drives. I want that whenever user tries to mount drive it should ask for password. I know password protecting ALL drives is possible through user previlages but I dont want it for all drives. I want it for single drive.

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Well, i have a workaround of sorts, try using truecrypt? to just encrypt that one drive that you want!

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TrueCrypt is not a workaround, it's the solution - so long as you care in the least about real security. – Stefano Palazzo Nov 14 '10 at 17:07
I don't want to risk the drive using truecrypt, It has too much important data. Any other solution please? – SIDD Nov 16 '10 at 8:14
Why do you think that truecrypt is risky? I use it since 4 years ago for my personal data and it always worked right. – neuromancer Nov 16 '10 at 15:33
Of course truecrypt is quite safe to use, but you should back it up beforehand. You should always back up, and after you've done that, you should back up some more. :-) Truecrypt can't, as far as I know, convert a drive in-place, so you might as well try it out, leaving the original copy intact, to see if it is reliable before you delete the originals, having backed them up of course. – Stefano Palazzo Nov 20 '10 at 15:38

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