On Fri, Oct 24, 2014 at 10:13:28 +1100, Tom Robinson wrote:
> upgraded the OS (prompted by issues unrelated to backup) but the tape
> performance was already suffering degradation before that (starting in
> August with degradation from 117% (2014-08-10) to 86% tape capacity
> the following week, then steadily declining weekly by week to 57.6%,
> 56.6%, 42.9%, 54.4%, etc., remaining at about 56%,
This is a bit of a shot in the dark, but we had a situation with our
LTO-2 drive where apparently the head-cleaning cartridge wasn't cleaning
(though it acted normally when inserted). We were getting end-of-tape
errors on our tapes with much less data than expected, in spite of
various attempts to figure out what was wrong -- until we tried a new
cleaning cartridge and suddenly tape capacities were more or less back
to normal....
Nathan
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Nathan Stratton Treadway - [email protected] - Mid-Atlantic region
Ray Ontko & Co. - Software consulting services - http://www.ontko.com/
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