[dm-crypt] Efficacy of xts over 1TB

[Arno Wagner]

On Mon, Jul 26, 2010 at 11:28:03PM +0200, Christoph Anton Mitterer wrote:
> On Mon, 2010-07-26 at 23:01 +0200, Arno Wagner wrote:
> > On Mon, Jul 26, 2010 at 10:47:43PM +0200, Christoph Anton Mitterer wrote:
> > > On Mon, 2010-07-26 at 10:53 +0200, Arno Wagner wrote:
> > > > > Well but as far as I understand, this means that the same IV could be
> > > > > used in multiple sectors (after the 32bit), right?
> > > > Err, no? That would be "after 64 bit".
> > > 
> > > Uhm why? If we have 64, bits but the upper 32 are masked 0 as far as I
> > > understood... ?
> > 
> > For plain. Not for plain64, i.e. plain is plain 64 with 32 bits 
> > masked and plain64 is full 64 bits.
> Yeah that's what I meant,.. did I write plain64?

Hmm. I think so, but I am not sure anymore. Anyways, plain64
solves the problem. Incidentially I have kernel 2.6.34 (and 
now 2.6.34.1) running on several different machines without 
any problem, and it has plain64. Not that I have a disk large 
enough to need it ;-)
 
Arno

-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
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