[FDE] FDE Impact analysis: Tools / method used to get the numbers?

[Michael Jardine]

I¹m guessing you already know that Seagate has a fully encrypted drive where
the encryption takes place in a chip on the drive itself, so there is no
difference in disk access time.
--
Regards
Michael



From: Yoram Shacham <yoram.shacham at gmail.com>
Reply-To: <fde at www.xml-dev.com>
Date: Wed, 24 Jan 2007 10:07:06 +0200
To: <fde at www.xml-dev.com>
Subject: Re: [FDE] FDE Impact analysis: Tools / method used to get the
numbers?

Saqib,

Do you have any kind of "user experience" benchmark?
What I mean is that disk access time is the easiest parameter to measure,
however in many cases the user does not "feel" the access time degradation
on day to day use. 
Is there a kind of a benchmark showing measurements for different kind of
users (i.e. compilation tools, silicon design tools, office tools, etc.)?

Thanks,
Yoram

On 1/23/07, Saqib Ali <docbook.xml at gmail.com> wrote:
> Hello Javier,
> 
> Sorry for the late response. I used a File Access Timer utility. This
> utility is for limited distribution to only disk management software
> (e.g. defrag) vendors. It can read a complete file, and you can define
> the block size. It produces excellent stats.
> 
> However I think one could write this utility in C. It shouldn't be that
> complex.
> 
> If you going to perform the test, please try with smaller file sizes.
> That would be interesting.
> 
> On 1/18/07, Javier Jarava <jjarava at gmail.com> wrote:
>> > Hi all!!
>> >
>> > I am interested in doing some research on FDE impact myself. I've been
>> > doing some internal benchmarking using HDTACH, but I'd like to test
>> > using other methods / tests that might be more relevant. I would also
>> > like to be able to compare my results to those you've published on
>> >
>> > http://www.xml-dev.com/blog/index.php?action=viewtopic&id=250
>> <http://www.xml-dev.com/blog/index.php?action=viewtopic&amp;id=250>
>> >
>> > So, could you give us a bit more information on how the test were
>> > done? Maybe you could share your test setup/scripts to use them for
>> > repro. here.
>> >
>> > Feel free to contact me off-list if you prefer.
>> >
>> > Thanks a lot.
>> >
>> >   Javier Jarava
>> > _______________________________________________
>> > FDE mailing list
>> > FDE at www.xml-dev.com
>> > http://www.xml-dev.com/mailman/listinfo/fde
>> <http://www.xml-dev.com/mailman/listinfo/fde>
>> >
> 
> 
> --
> Saqib Ali, CISSP, ISSAP
> http://www.full-disk-encryption.net
> _______________________________________________
> FDE mailing list
> FDE at www.xml-dev.com
> http://www.xml-dev.com/mailman/listinfo/fde
> 


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