You may also want to use the following perl script to analyze
/nsr/logs/daemon.log

#!/usr/bin/perl

  while(<>)
  {
    if (/loading volume (.*) into (.*)/)
    {
      $vol = $1;
      $dev = $2;
      $volx{$dev} = $vol;
#      print "$vol $dev\n";
    }
    if (/media warning: (.*) reading.*O error/)
    {
        $badev = $1;
      print "ERROR $badev $volx{$badev}\n";
    }
  }



  Further processing the output of the script like that, may spot some
order in what may seems random:

# /usr/local/TAUSRC/Local/logwatch/logwatchng.pl < /nsr/logs/daemon.log |
awk '{print $2}' | sort | uniq -c| sort -n
  24 /dev/rmt/1stcbn
  26 /dev/rmt/2stcbn
  36 /dev/rmt/0stcbn


# /usr/local/TAUSRC/Local/logwatch/logwatchng.pl < /nsr/logs/daemon.log |
awk '{print $3}' | sort | uniq -c | sort -n
  12 000002
  74



-- Yaron.

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