I resuse them every few months.  I toss them after I've run out of lines
to write the dates of the backups in the paper insert that comes in the
plastic box.

That covers a good few years and also obsoletes them after frequency of
use.  It's no engineering standard but it suits me.

On Wed, 17 Mar 1999, Kathy Psaris wrote:

> Does anyone know the life span of a dds data cartridge?
> I think its up to 10 years if you unstick (vstore) it once
> a year  and store it in a proper enviroment.
> How many hours or uses can you get out of it?  Is it
> 300 times? 100 hours?
> TIA
> Kathy Psaris
> Intracom S.A.

Tracy Johnson
"Trust No One" - Semper Gumby