[Info-vax] SDLT 1 tape cartridge longevity?

[RobertsonEricW]

On Nov 3, 9:28 am, RobertsonEricW <robertsoner... at netzero.net> wrote:
> On Nov 2, 5:31 pm, mathog <dmat... at sbcglobal.net> wrote:
>
>
>
>
>
> > On Nov 2, 12:56 pm, "Richard B. Gilbert" <rgilber... at comcast.net>
> > wrote:
>
> > > Methinks you are tilting at windmills!
>
> > Vendors who break contracts, which is exactly what this is, make me
> > grumpy.
>
> > >Try a different brand of tape or
> > > a whole different technology if you can find such.
>
> > The Maxell tapes have held up much better than the Quantum brand.
> > Fuji also makes some.  I have no experience
> > with Fuji SDLT cartridges, their DLTtape IIIXT held up OK, but those
> > were made long ago, and who knows what the quality control is like
> > now.
>
> > While shopping found a "new" brand "Echo", which sells _recycled_
> > tapes.  See for instance:
>
> >  http://www.tapeandmedia.com/detail.asp?product_id=ECHO-SDLT
>
> > These come with the same lifetime guaranty that the Quantum's did.
> > Hopefully for Echo "lifetime" will never mean "whatever we want it to
> > mean", since if these include Quantum recycled tapes (no way to tell),
> > they likely fail at exactly the same rate as non-recycled Quantum's.
>
> > Regards,
>
> > David Mathog
>
> Defeinitely sounds like poor quality tapes to me. I don't have an
> online reference but here is a transcription of a table from a
> FujiFilm document on tape durability and lifetime:
>
> DRIVE         DLTtape     PASSES PER        MEDIA PASSES
> EQUIVALENT
> MODEL       MEDIA       FULL USE              SPECIFICATION
> FULL USES
> ------------      -------------    ----------------------
> ------------------------        ---------------------
> SDLT-320    SDLT1               56
> 1,000,000                  17,857
> SDLT-220    SDLT1               56
> 1,000,000                  17,857
> DLT1,VS80    IV                   84
> 1,000,000                  11,905
> DLT8000        IV                   52
> 1,000,000                  19,230
> DLT7000        IV                   52
> 1,000,000                  19,230
> DLT4000        IV                   64
> 1,000,000                  15,625
> DLT2000XT   III, XT                64
> 1,000,000                  15,625
> DLT2000         III                   64
> 500,000                   7,812
> DLT600           III                   56
> 500,000                   8,928
> DLT260           III                   24
> 500,000                  20,833
>
> These values are considered conservative because they are based on
> complete usage of the tape each time (i.e. the entire storage area of
> the tape is consumed). In most cases, each use is considerably less
> than the complete storage capacity of the tape and so you should
> experience lifetimes longer than these (So FujiFilm says anyway).
>
> Eric- Hide quoted text -
>
> - Show quoted text -

Here is the online link to the document from FujiFilm about Tape
Durability:

http://www.dexxon.eu/se/shop/object.php?OBJID=11053