Re: Is LUKS cluster save?

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Hi Lars,

if the OCFS2 uses the LUKS layer just as it would use any other
physical storage device, there should not be any problem.
A LUKS device is just a block device, like a raw disk or
partition. If there are however special requirements
(typically not fulfilled by a raw disk partition) on the
layer below OCFS2, then LUKS likely does not qualify,
just as the raw partition would not qualify.

Arno



On Tue, Feb 05, 2008 at 08:23:31PM +0100, Lars T?uber wrote:
> Hi there,
> 
> lately I had the idea of setting up an external storage for a small cluster.
> I asked myself if I could encrypt the storage? So the question is:
> Is LUKS cluster save in the following way?
> 
> +-----------+   +-----------+
> |Linux box 1|   |Linux box 2|   both LUKSOpen the HDD independently evtly
> +-----+-----+   +-----+-----+   with different keys
>        \             /          both mount the OCFS2 filesystem on success
>         \           /
>          \         /
> firewire  \       /
> or scsi    \     /
> or SAS   +--+---+--+
>          |  OCFS2  |
>          |   on    |
>          |  LUKS   |
>          |   on    |
>          |   HDD   |
>          +---------+
> 
> I'm not sure if LUKS writes something to the header (or elsewhere on the storage) on a successful LUKSOpen.
> 
> Thanks an best wishes
> Lars
> 
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-- 
Arno Wagner, Dipl. Inform., CISSP --- CSG, ETH Zurich, arno@xxxxxxxxxxx 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
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