On Tue, December 12, 2017 9:06 am, Christian, Mark wrote:
> On Tue, 2017-12-12 at 09:41 -0500, Wells, Roger K. wrote:
>> I have existing systems with un-encrypted disks.
>> I have tried unsuccessfully to encrypt them using LUKS.
>> Has anyone out there been able to encrypt an existing system (after the
>> fact, so to speak)?
> Using cryptsetup to create a LUKS encrypted disk will wipe all the data on
> an
> existing disk.
This is easy to understand if one considers them as layers: and you can
not sneak anything underneath existing layer, you can only put next layer
on top of existing (first is without second is with encryption):
physical or virtual disk --> filesystem
physical or virtual disk --> encryption layer --> filesystem
I hope, this helps.
Valeri
>
> Mark
>
>>
>> TIA
>>
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++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
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