On 9/25/12 12:43 PM, "Stephen Thompson" <stephen AT seismo.berkeley DOT edu>
wrote:


>
>
>
>Thanks everyone for the suggestions, they at least give me somewhere to
>look, as I was running low on ideas.
>
>
>More info...
>
>The tape in question have only been used once or twice.
>
>The library is a StorageTek whose SLConsole reports no media (or drive)
>errors, though I will look into those linux-based tools.
>
>Our Sun/Oracle service engineer claims that our drives do not require
>cleaning tapes.  Does that sound legit?
>
>Our throughput is pretty reasonable for our hardware -- we do use disk
>staging and get something like 60Mb/s to tape.
>
>Lastly, the tapes that get 200 vs 800 are from the same batch of tapes,
>same number of uses, and used by the same pair of SL500 drives.  That's
>primarily why I wondered if it could be data dependent (or a bacula bug).
>
>
>thanks!
>Stephen

I've found LTO drives of any variety rarely need cleaning.  I've found
that one cleaning tape will usually be sufficient for the life of a
library.  Your field support may very well be right.

Patti Clark
Linux Administrator
Research and Development Systems Support Oak Ridge National Laboratory







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