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===== Change devices parameters for tuning =====

This script can be executed on LPAR, and also on root, without argument, it's just a preview. With '-f' it will FIX all changes, it possible it's directly applied, else at the end it report all parameters currently set that will be changed after the reboot.

==== Environment variables ====

Centralize variables for all scripts: .env file
<cli prompt='#'>
# global variables for all scripts
export binpath=/root/script/bin
export sn=`basename $0 | cut -d. -f1`
export HOSTNAME=`hostname`
export logpath=/root/script/log
export logname=$logpath/$sn.log
export configfile=$binpath/$sn.cfg
export destination="test@test.com"
</cli>

==== File_name ====

**change_devices_param.sh**

Change disks and adapter settings:
<code>
#!/bin/ksh93
#set -x
#############################################
#@(#) Change disk and adapter attribute on a host
#############################################
# check if a disk on LPAR has the same path
# version 1.0 08-04-2010 Manu
# version 1.1 21-09-2015
#############################################

dir=`dirname $0`
. $dir/.env

#------------------------------------------------
# usage ()
#------------------------------------------------
usage()
{
echo "Usage: (" "|-v|-f)"
echo "\tChange disks and adapter parameters on LPAR or VIOS if needed"
echo "\tFirst try to change, if not succeed, change to ODM only"
echo "\t-v: verbose (default yes)"
echo "\t-f: fix correct parameter (default no)"
}

#------------------------------------------------
# chhostval ()
# try to change a value on a device, if it
# doesn't succeed, then change in ODM only
#------------------------------------------------
chhostval()
{
dev=$1
attr=$2
val=$3
difference=$4

if [ ${#} -ne 4 ]
then
  difference="equal"
fi

val1=$(echo $val | sed 's/^0x//')

value=$(lsattr -El $dev | grep "^$attr " | awk '{print $2}')
value1=$(echo $value | sed 's/^0x//')
  
if [ $difference == "higher" ]
then
  if [ $(expr ${value1} \< ${val1}) -eq 1 ]
  then
    if [ $fix != "yes" ]
    then
      printf "\E[31;1m""!!! FIX. $attr need to be changed from $value to $val !!!"" $1\E[0m\n"
    else
      printf "\E[31;1m""FIX. $attr will be changed from $value to $val"" $1\E[0m\n"
      chdev -l $dev -a $attr=$val > /dev/null 2>&1
      if [ "$?" -ne 0 ]
      then
        chdev -l $dev -a $attr=$val -P
        echo "must be rebooted before changes applies"
      else
        printf "\E[32;1m""OK. $attr for $dev changed to $val"" $1\E[0m\n"
      fi
      sleep 1
    fi
  else
    printf "\E[32;1m""OK. $attr for $dev is already $value"" $1\E[0m\n"
  fi
else
  if [ $difference == "lower" ]
  then
    if [ $(expr ${value1} \> ${val1}) -eq 1 ]
    then    
      if [ $fix != "yes" ]
      then 
        printf "\E[31;1m""!!! FIX. $attr need to be changed from $value to $val !!!"" $1\E[0m\n"
      else
        printf "\E[31;1m""FIX. $attr will be changed from $value to $val"" $1\E[0m\n"
        chdev -l $dev -a $attr=$val > /dev/null 2>&1
        if [ "$?" -ne 0 ]
        then
          chdev -l $dev -a $attr=$val -P
          echo "must be rebooted before changes applies"
        else
          printf "\E[32;1m""OK. $attr for $dev changed to $val"" $1\E[0m\n"
        fi
        sleep 1
      fi
    else
      printf "\E[32;1m""OK. $attr for $dev is already $value"" $1\E[0m\n"
    fi
  else
    if [ $difference == "equal" ]
    then
      if [[ ${value1} != ${val1} ]]
      then
        if [ $fix != "yes" ]
        then
          printf "\E[31;1m""!!! FIX. $attr need to be changed from $value to $val !!!"" $1\E[0m\n"
        else
          printf "\E[31;1m""FIX. $attr will be changed from $value to $val"" $1\E[0m\n"
          chdev -l $dev -a $attr=$val > /dev/null 2>&1
          if [ "$?" -ne 0 ]
          then
            chdev -l $dev -a $attr=$val -P
            echo "must be rebooted before changes applies"
          else
            printf "\E[32;1m""OK. $attr for $dev changed to $val"" $1\E[0m\n"
          fi
          sleep 1
        fi
      else
        printf "\E[32;1m""OK. $attr for $dev is already $value"" $1\E[0m\n"
      fi
    fi 
  fi
fi
}

#------------------------------------------------
# change_path ()
#------------------------------------------------
change_path()
{
dev=$1
parent=$2
prio=$3

if [ `lspath -AEH -l $dev -p $parent | grep priority | awk '{print $2}'` != "$prio" ]
then
        connect=`odmget -q "name=$dev and parent=$parent and path_status=1" CuPath | grep connection | awk '{print $3}'`
        if [ $fix != "yes" ]
        then
           printf "\E[31;1m""!!! FIX. path priority need to be changed on $dev $parent to $prio !!!"" $1\E[0m\n"
        else
           chpath -l $dev -p $parent -w $connect -a priority=$prio > /dev/null 2>&1
           if [ "$?" -ne 0 ]
           then
             printf "\E[31;1m""!!!ERROR cannot change path priority on $dev $parent to $prio"" $1\E[0m\n"
           else
             printf "\E[31;1m""FIX. changed priority on $dev $parent Priority `lspath -AEH -l $dev -p $parent | grep priority | awk '{print $2}'`"" $1\E[0m\n"
           fi
        fi
else
        printf "\E[32;1m""OK. No change to priority required on $dev $parent Priority `lspath -AEH -l $dev -p $parent | grep priority | awk '{print $2}'`"" $1\E[0m\n"
fi
}

#------------------------------------------------
# dmsg ()
#------------------------------------------------
dmsg()
{
if [ $debug == "yes" ]
then
   echo "$1"
fi
}


#------------------------------------------------
# check_lpar_param ()
#------------------------------------------------
check_lpar_param ()
{
#********************************
# Check on LPAR or pSeries

   #--------------------------------
   # Check ent Virtual adapter attributes

   list=""
   lsdev -C | grep '^ent' | grep -i 'virtual' | while read line
   do 
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check ENT $device on $HOSTNAME -----"
     echo ""

     attribut="max_buf_huge"
     goodval="128"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_huge"
     goodval="64"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_large"
     goodval="128"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_large"
     goodval="64"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_medium"
     goodval="512"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_medium"
     goodval="256"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_small"
     goodval="4096"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_small"
     goodval="2048"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_tiny"
     goodval="4096"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_tiny"
     goodval="2048"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval
     
     attribut="poll_uplink"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval     
   done

   #--------------------------------
   # Check en Virtual adapter attributes

   list=""
   lsdev -C | grep '^ent' | grep -i virtual | sed 's/^ent/en/' | while read line
   do      
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check EN $device on $HOSTNAME -----"
     echo ""

     attribut="mtu_bypass"
     goodval="on"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval
   done

   #--------------------------------
   # Check fcs attributes

   list=""
   lsdev -C | grep '^fcs' | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done

   for device in $list
   do
      echo ""
      echo "----- Check FCS $device on $HOSTNAME -----"
      echo ""

      attribut="max_xfer_size"
      goodval="0x200000"
      diffval="higher"
      chhostval $device $attribut $goodval $diffval

      attribut="num_cmd_elems"
      goodval="256"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done

   #--------------------------------
   # Check fscsi attributes

   list=""
   lsdev -C | grep fscsi | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done

   for device in $list
   do
      echo ""
      echo "----- Check FSCSI $device on $HOSTNAME -----"
      echo ""

      lsdev -p $device | grep rmt  
      if [ $? != 0 ]
      then
         attribut="fc_err_recov"
         goodval="fast_fail"
         diffval="equal"
         chhostval $device $attribut $goodval $diffval

         attribut="dyntrk"
         goodval="yes"
         diffval="equal"
         chhostval $device $attribut $goodval $diffval
      else
         echo "FSCSI $device on $HOSTNAME has tapes as child devices"
      fi
   done

   #--------------------------------
   # Check Virtual SCSI Client Adapter

   list=""
   lsdev -Cc adapter |grep 'Virtual SCSI Client Adapter' | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done

   for device in $list
   do
      echo ""
      echo "----- Check Virtual SCSI Client Adapter $device on $HOSTNAME -----"
      echo ""

      attribut="vscsi_path_to"
      goodval="30"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval     

      attribut="vscsi_err_recov"
      goodval="fast_fail"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done

   #--------------------------------
   # Check 2107 disk attributes

   list=""
   lsdev -Cc disk |grep 'IBM MPIO FC 2107' | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done
 
   for device in $list
   do
      echo ""
      echo "----- Check IBM MPIO FC 2107 $device on $HOSTNAME -----"
      echo ""

      attribut="algorithm"
      goodval="load_balance"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval     

      attribut="hcheck_interval"
      goodval="60"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval     

      attribut="hcheck_mode"
      goodval="nonactive"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done
 
   #--------------------------------
   # Check Virtual SCSI Disk Drive attributes

   list=""
   lsdev -Cc disk |grep 'Virtual SCSI Disk Drive' | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done
 
   for device in $list
   do
      echo ""
      echo "----- Check Virtual SCSI Disk Drive $device on $HOSTNAME -----"
      echo ""

      attribut="algorithm"
      goodval="fail_over"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval

      attribut="hcheck_interval"
      goodval="60"    # IBM support recommendation
      diffval="equal"
      chhostval $device $attribut $goodval $diffval

      attribut="hcheck_mode"
      goodval="nonactive"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval

      attribut="reserve_policy"
      goodval="no_reserve"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
 
      attribut="queue_depth"
      goodval="20"
      diffval="higher"
      chhostval $device $attribut $goodval $diffval

      # Alternate path on the 2 VIOS
      # Calcul disk pair ou impair
      nbscsi=0
      if [ $(lspath -l $device | grep vscsi | wc -l | awk '{print $1}') -eq "2" ]
      then
        for line in $(lspath -l $device | sort | awk '{print $3}')
        do
          vscsi[$nbscsi]=$line
          let nbscsi="($nbscsi +1)"
        done
        num=`echo $device | sed "s/hdisk//"`
        let "num1=num/2"
        # Priorite 1 pour chiffre pair sur VSCSI1 et 2 sur VSCSI2 (inversement sur chiffre impair)
        let "priority=num-num1*2+1"
        case $priority in
                  "1")    change_path $device ${vscsi[0]} 1
                          change_path $device ${vscsi[1]} 2
                          ;;
                  "2")    change_path $device ${vscsi[0]} 2
                          change_path $device ${vscsi[1]} 1
                          ;;
                  "*")    echo "**** ERROR ****"
                          ;;
        esac
      fi

   done
}

#------------------------------------------------
# check_vios_param ()
#------------------------------------------------
check_vios_param ()
{
#********************************
# Check on VIO Servers

   #--------------------------------
   # Check ent Virtual adapter attributes

   list=""
   lsdev -C | grep '^ent' | grep -i 'virtual' | while read line
   do 
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check ENT $device on $HOSTNAME -----"
     echo ""

     attribut="max_buf_huge"
     goodval="128"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_huge"
     goodval="64"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_large"
     goodval="128"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_large"
     goodval="64"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_medium"
     goodval="512"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_medium"
     goodval="256"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_small"
     goodval="4096"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_small"
     goodval="2048"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="max_buf_tiny"
     goodval="4096"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval

     attribut="min_buf_tiny"
     goodval="2048"
     diffval="higher"
     chhostval $device $attribut $goodval $diffval
     
     attribut="poll_uplink"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval     
   done

   #--------------------------------
   # Check en Virtual adapter attributes

   list=""
   lsdev -C | grep '^ent' | grep -i virtual | sed 's/^ent/en/' | while read line
   do      
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check EN $device on $HOSTNAME -----"
     echo ""

     attribut="mtu_bypass"
     goodval="on"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval
   done
   
   #--------------------------------
   # Check ent SEA attributes

   list=""
   lsdev -C | grep '^ent' | grep -i 'shared ethernet adapter' | while read line
   do 
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check ENT SEA $device on $HOSTNAME -----"
     echo ""
     
     attribut="adapter_reset"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval

     attribut="jumbo_frames"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval

     attribut="large_receive"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval

     attribut="largesend"
     goodval="1"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval
   done

   #--------------------------------
   # Check ent 10GbE adapter attributes

   list=""
   lsdev -C | grep '^ent' | grep '10GbE' | while read line
   do
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check ENT $device on $HOSTNAME -----"
     echo ""

     attribut="flow_ctrl"
     goodval="no"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval

     attribut="jumbo_frames"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval

     attribut="large_receive"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval

     attribut="large_send"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval
   done
   
   #--------------------------------
   # Check ent Etherchannel adapter attributes

   list=""
   lsdev -C | grep '^ent' | grep 'Etherchannel' | while read line
   do
     echo $line | read dev dummy
     list="$list $dev"
   done

   for device in $list
   do
     echo ""
     echo "----- Check ENT $device on $HOSTNAME -----"
     echo ""

     attribut="use_jumbo_frame"
     goodval="yes"
     diffval="equal"
     chhostval $device $attribut $goodval $diffval
   done
   
   #--------------------------------
   # Check fcs attributes

   list=""
   lsdev -C | grep '^fcs' | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done

   for device in $list
   do
      echo ""
      echo "----- Check FCS $device on $HOSTNAME -----"
      echo ""

      attribut="max_xfer_size"
      goodval="0x200000"
      diffval="higher"
      chhostval $device $attribut $goodval $diffval

      attribut="num_cmd_elems"
      goodval="1600"
      diffval="higher"
      chhostval $device $attribut $goodval $diffval
   done
   
   #--------------------------------
   # Check fscsi attributes

   list=""
   lsdev -C |grep fscsi | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done
  
   for device in $list
   do
      echo ""
      echo "----- Check FSCSI $device on $HOSTNAME -----"
      echo ""

      attribut="fc_err_recov"
      goodval="fast_fail"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
     
      attribut="dyntrk"
      goodval="yes"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done

   #--------------------------------
   # Check 2107 disk attributes

   list=""
   lsdev -Cc disk |grep 'IBM MPIO FC 2107' | while read line
   do
      echo $line | read dev dummy
      list="$list $dev"
   done
 
   for device in $list
   do
      echo ""
      echo "----- Check IBM MPIO FC 2107 $device on $HOSTNAME -----"
      echo ""

      attribut="algorithm"
      goodval="load_balance"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval

      attribut="hcheck_interval"
      goodval="60"
      diffval="higher"
      chhostval $device $attribut $goodval $diffval
     
      attribut="hcheck_mode"
      goodval="nonactive"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval

      attribut="reserve_policy"
      goodval="no_reserve"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done

   #--------------------------------
   # Check DS3xxx disk attributes

   list=""
   lsdev -Cc disk |grep 'MPIO DS3' | while read line
   do 
      echo $line | read dev dummy
      list="$list $dev"
   done
      
   for device in $list
   do
      echo ""
      echo "----- Check IBM MPIO DS3xxx $device on $HOSTNAME -----"
      echo ""

      attribut="reserve_policy"
      goodval="no_reserve"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done
   
   #--------------------------------
   # Check Hitachi disk attributes

   list=""
   lsdev -Cc disk |grep 'Hitachi Disk Array' | while read line
   do 
      echo $line | read dev dummy
      list="$list $dev"
   done
      
   for device in $list
   do
      echo ""
      echo "----- Check HITACHI DISK ARRAY $device on $HOSTNAME -----"
      echo ""

      attribut="queue_depth"
      goodval="20"
      diffval="higher"
      chhostval $device $attribut $goodval $diffval

      attribut="algorithm"
      goodval="round_robin"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
      
      attribut="reserve_policy"
      goodval="no_reserve"
      diffval="equal"
      chhostval $device $attribut $goodval $diffval
   done
}

###########################################################################
#
# main ()
#
###########################################################################

main () {

cd $path_script

# Read and check scripts arguments
debug=yes
fix=no
while [ $# -gt 0 ]
do
   case "$1" in
      -f) fix=yes ;;
      -v) debug=yes ;;
      -h|help) usage 
               exit 1;;
   esac
   shift
done

echo `date`" : Begin of "$sn" "$HOSTNAME
echo "**********************\n"

# Check if LPAR is a VIOS
ls /usr/ios/cli/ioscli  > /dev/null 2>&1
if [ $? -eq 0 ]
then
        check_vios_param
else
        check_lpar_param 
fi

echo "\n**********************"
nb=$(odmget CuAtSav | grep name | wc -l | awk '{print $1}')
if [ "$nb" -ne "0" ]
then
  printf "\E[31;1m""!!! FIX. A reboot is required to apply $nb device(s) parameter(s) !!!"" $1\E[0m\n"
  odmget CuAtSav | egrep "name|attribute|value" | paste - - -
  echo "\n**********************"
fi
echo `date`" : End of "$sn" "$HOSTNAME

}

main $* 2>&1 | tee $logname
</code>
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