jpiszcz wrote:
> On Wed, 25 Feb 2009, Rosenkoetter, Gabriel wrote:
> 
> 
> > I've had a NO_TAPEALERT touch file in all environments I've taken care of 
> > through several employers since the 4.5 days. I used to do that because the 
> > only TapeAlert NetBackup paid attention to (minimally, at the time) was 
> > drive cleaning, and I've always used libraries that were configured to take 
> > care of that themselves.
> > 
> > For a while now, in an environment I don't handle day to day for my current 
> > employer, we've had a heap of frozen media turn up on a regular basis. 
> > Because we're also short on media in that environment at the moment, I 
> > poked around and saw many TapeAlert warnings and "critical" messages (from 
> > 9940B drives, on an HP-UX 11.23 master/media server in both cases) related 
> > to the frozen media, none of which could then be correlated back to an I/O 
> > failures. In this environment, there was no NO_TAPEALERT touch file.
> > 
> > To test things out, I removed the NO_TAPEALERT file in another environment, 
> > where frozen tapes are much more rare (and usually because of a flipped r/w 
> > switch or catalog data on an old tape that found its way back to the 
> > scratch pool)... and immediately got about 12 frozen tapes over one night.
> > 
> > What *appears* to be happening is that bptm finishes writing to a tape, 
> > ejects the tape, checks for TapeAlerts on the drive, finds some (often, 
> > drives that want to dump diags, which I believe requires a visit by 
> > Sun/STK)... and responds by freezing the tape, even though nothing's 
> > actually *wrong* with the tape.
> > 
> > Am I doing something wrong with regard to managing my tape drives that all 
> > these TapeAlerts are popping up?
> > 
> > Am I missing some knob or dial somewhere to adjust what NBU/EMM/bptm 
> > decides to do when it receives a TapeAlert of a particular type? (No, I'm 
> > not looking for the MEDIA_ERROR_THRESHOLD of nbemmcmd: these "errors" are 
> > clearly not errors, and they'll keep happening no matter how high I set 
> > that threshold. I want them to just be ignored, while other, real, errors 
> > should still freeze media.)
> > 
> > For now, I'm just putting NO_TAPEALERT touchfiles in place in both 
> > environments...
> > 
> > --
> > gabriel rosenkoetter
> > Radian Group Inc, Senior Systems Engineer
> > gabriel.rosenkoetter < at > radian.biz, 215 231 1556
> > 
> > 
> > We don't use it, as a matter of fact it hoses Hp/Ux.
> > 
> > We let either ACSLS determine when to clean the tapes or the new library 
> > Spectra Logic also knows when to clean the tapes.
> > 
> > 
> > _______________________________________________
> > Veritas-bu maillist  -  Veritas-bu < at > mailman.eng.auburn.edu
> > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> > 
> > 
> 
> I use it, it cleans the tapes when the drives need it, works well.
> 
> Justin.
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu < at > mailman.eng.auburn.edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu


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