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On a Linux system, be it Debian, Redhat or any distro, I would like to encrypt the disk on the fly.

That is, encrypt the disk transparently to the OS whilst it is running, reboots, shuts down etc. In addition it should not destroy data. I know there is (commercial) software for windows that does it. But I need a Linux solution.

The solutions I know of do not support this as far as I can see (luks, truecrypt...). Maybe there is some hack or work around available?

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closed as not constructive by Ward, EEAA, Michael Hampton, Zoredache, Brent Pabst Dec 13 '12 at 13:03

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If you're that hard up for uptime, methinks you're doing it wrong. –  EEAA Dec 13 '12 at 2:36
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It's a reasonable question. After all, BitLocker does this to some extent. Though as far as I know, no Linux solutions offer it. –  Michael Hampton Dec 13 '12 at 2:37
    
Not doing it wrong. If disk encryption requires you to re-install the OS it will become a bit prohibitive with regards to time and resources spent when you have to do it for more than a couple of users. –  aseq Dec 13 '12 at 2:42
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@aseq You don't have some sort of automated deployment, standardized images, etc.? –  Michael Hampton Dec 13 '12 at 2:45
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Your question generated some discussion in chat. Feel free to join us. –  Michael Hampton Dec 13 '12 at 2:50
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