> Legato wrote tape 0019 until full, skipped tape 0020 and 0021, then wrote 
> 640GB to tape 22 which is still appendable, then went back to tape 20 and has 
> written 127GB and counting to that tape. 

Did it work before?
Is it a new install?
What changed the last few days/weeks?
Were there any errors in the log (i/o ...)?
Maybe errors on the SAN?

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