#!/usr/bin/perl

my $debug = 0;
my $limit=10;

foreach( 1 .. $limit )
{
      open( IOSTAT, "iostat -d -t  -x /dev/sda |")|| die ;
      while ( <IOSTAT> )
     {
       if ( /Time:(.*)/ )
       {
          $time="$1";
       }
       elsif( /sda/ )
       {
          ($disk,$rrqm_s,$wrqm_s,$r_s,$w_s,$rsec_s,$wsec_s,$avgrq_sz,$avgqu_sz,$await,$svctm,$util)=split(/\s+/, $_);
       } 
     }
     close(IOSTAT);

     # Pack the data into arrays
     push( @time,    $time    );
     push( @disk,    $disk    );
     push( @rrqm_s,  $rrqm_s  );
     push( @wrqm_s,  $wrqm_s  );
     push( @r_s,     $r_s     );
     push( @w_s,     $w_s     );
     push( @rsec_s,  $rsec_s  );
     push( @wsec_s,  $wsec_s  );
     push( @avgrq_sz,$avgrq_sz);
     push( @avgqu_sz,$avgqu_sz);
     push( @await,   $await   );
     push( @svctm ,  $svctm   );
     push( @util,    $util    );
}

print "Processing Data";
while ( $thing  >= 0 ){
    print "$thing $time[$thing]\t$disk[$thing]\n" ;
    $thing=$thing-1;
}