[nylug-talk] Recommendations for encrypted tape drive(s)?

[Luis Murillo]

Software compression and encryption means that the backup job will
take longer, specially when data is being transfered to the tape
drive, and delaying the stream of data is something that you don't
want to happen since it will create more wear and tare with the media.
If data is not streamed to the drive fast enough then it will cause
for the drive to stop rewind and start writing again...all throughout
the process the head will be touching the media in order to go back to
the point where the last bit of data was written and this is what
causes for the media to be worn out faster.
So the hardware encryption and compression are done on the tape drive
itself which means that the system can simply dedicate it's resources
to streaming the data to the tape drive and not have to use processing
power to do that. Also most of the people don't have a dedicated
server and with the newest tape drives you need the most out of your
system in order to have the drive perform the fastest.
In some older tape drives you actually would loose capacity of the
media because of that constant stopping, because the drive instead of
stopping and rewinding would start writing zeros to the media which
meant that the media had blocks of zeros just taking up space.

LM.

On 3/4/08, Sunny Dubey <sunny at opencurve.org> wrote:
> On Monday 03 March 2008 11:15:42 pm R. Mariotti wrote:
>  > Does anyone have any experience with any drive encrypted devices or
>  > recommend SCSI tape drives that perform encryption?
>
>
> I hate to ask the obvious question ...
>
>  But why not encrypt on the software layer ?
>
>
>  --
>  Sunny Dubey
>
>   mail:  sunny at audiowiki.org
>   tele:  212.333.3542
>
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-- 
LuisM