On Fri, 2 Sep 2005, Albert Eddie Contractor AFRPA/ESS wrote:

AECA> Fairly new install (3 months) 
AECA> ADIC SCALAR 24s and ADIC SCALAR 100
AECA> Networker for Windows 7.2
AECA> 
AECA> I have 3 sites similar hardware and identical installs
AECA> 
AECA> All 3 sites have tapes being marked very prematurely as FULL when they
AECA> are no where near it.
AECA> 
AECA> 178 MB tape marked as full on a 200GB natural LTO2 tape.
AECA> 
AECA> ADIC points to software, Legato points to ADIC here I am stuck in the
AECA> middle with you!
AECA> 
AECA> Any ideas what could be causing this?

We had similar issues with our Spectra T950 before. We saw I/O errors just 
before the tapes got marked as full, in the OS and networker logs. Maybe 
you should check that too? If networker gets a hard error, it will stop 
writing to the tape and mark it as full.

In our case, the cause was due to bugs in the software that runs the 
library. I'm not quite sure if it was drive firmware or library firmware 
that solved the problem though. But my best advice would be to start 
looking for problems in system logs around when the tape gets marked as 
full prematurely. And get ADIC or your ADIC service partner to perform a 
library and drive firmware upgrade, if such an upgrade is available.

//Oscar

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