tools/bin/diskqual.ksh

#!/bin/ksh
#
# Licensed to the Apache Software Foundation (ASF) under one
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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disks=`format </dev/null | grep c.t.d | nawk '{print $2}'`

getspeed1()
{
   ptime dd if=/dev/rdsk/${1}s0 of=/dev/null bs=64k count=1024 2>&1 |
       nawk '$1 == "real" { printf("%.0f\n", 67.108864 / $2) }'
}

getspeed()
{
   for iter in 1 2 3
   do
       getspeed1 $1
   done | sort -n | tail -2 | head -1
}

for disk in $disks
do
   echo $disk `getspeed $disk` MB/sec
done