On 10/16/2014 1:33 PM, Clark, Patricia A. wrote:
> Hijacking a thread is not acceptable - new thread on tape longevity statement.
>
> Your assertion on longevity of tape is incorrect and I have a link for one 
> manufacturer that has their metrics across time and writes.
> http://support2.imation.com/downloads/imn/LTO/Usage_Life_Imation_Media.pdf
>
> There are others out there for the various manufacturers and formats.
>
> Other than SSD technology, disks have a hard time keeping up with the speed 
> of modern tape drives.  Price point, tape is less expensive.
>
> I have lost data on failed disk drives.  I have not yet lost data on a backup 
> tape.  What evidence do you have to support  disk over tape for backups?

I have. All media experiences bit rot. Never put too much faith in a 
single piece of media of any sort. With replication and a reasonable 
rotation schedule (ie. far more frequent than the MTBF), any of the 
above will work. It then becomes a matter of cost, so probably LTO-5.

> Patti Clark
> Linux System Administrator
> R&D Systems Support Oak Ridge National Laboratory
>

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