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May 03 2003
NBU Trick #3 - Got an Itch? Print E-mail
Written by Paul Winkeler   
Friday, 02 May 2003
Invariably NetBackup administrators freshly gloating over a few weeks' worth of successful NetBackup runs find themselves wondering why they are suddenly seeing jobs failing with error code 96 even though there are plenty of empty volumes available. Closer investigation shows that the empty volumes are not in the volume pool required by the failed jobs.
NetBackup will pull volumes from the scratch pool when the pool it is looking for is empty, but it will not pull tapes from other pools. The nail in the coffin, however, is that NetBackup will also not return empty volumes back to the scratch pool. That step is up to the administrator. Here is how to automate what some feel should be an integral part of NetBackup to begin with.
Last Updated ( Monday, 27 August 2007 )
Apr 28 2003
NBU Trick #2 - Slow Filling; More Tape? Print E-mail
Written by Paul Winkeler   
Monday, 28 April 2003
The corollary to NBU Trick #1, "Where Did All My Tapes Go?" is the question "How Long Does it Take to Fill a Tape?". The trick to answering this question is to make use of three tape attributes NetBackup kindly tracks for us:
  • The date on which the tape was allocated to the media server. The assumption being made that this is then also the date on which the tape was first written.
  • The date on which the tape was last written.
  • And of course the bit that tells us the tape is in fact full
The snippet of NBU empowered code you need to compute this interval then trivially becomes:
Last Updated ( Friday, 21 September 2007 )
Apr 27 2003
NBU Trick #1 - Where Did All My Tapes Go? Print E-mail
Written by Paul Winkeler   
Sunday, 27 April 2003
Whenever you find yourself knee deep in NetBackup error code 96 messages, you wonder where all those you bought justa few months ago tapes went. Have your washer and dryer passed their sock disappearing genes on to your tape library?
Below is the listing for a short NBU Module based Perl script included in the distribution called vu.pl, which breaks down tape usage by retention period and volume type (a.k.a. density):
Last Updated ( Monday, 27 August 2007 )