LSI MEGARAID GUIDE Centos and more.

MegaCLI Scripts and Commands


Installing the MegaCLI binary

In order to communicate with the LSI card you will need the MegaCLI or MegaCLI64 (64bit) program. The install should be quite easy, but LSI make us jump through a few hoops. This is what we found:

  • Go to the LSI Downloads page: LSI Downloads
  • Search by keyword “megacli
  • Click on “Management Software and Tools”
  • Download the MegaCLI zip file. You will see the same file is for DOS, Windows, Linux and FreeBSD.
  • Unzip the file
  • In the Linux directory there is an RPM. If you are using Redhat you can install it. For Ubuntu got the next step.
  • For Ubuntu run “rpm2cpio MegaCli-*.rpm | cpio -idmv” to expand the directory structure. You may need to “apt-get install rpm2cpio” .
  • For FreeBSD unzip the file in the FreeBSD directory.

Or just run this script which we found here

RAID controllers

Some known RAID controllers based on this chipset are:

  • Dell PERC 6/i Integrated RAID Controller
  • Dell PERC 5/i Integrated RAID Controller
  • Dell PERC H710P Mini

Install

For the impatient there is an installer script for installing required tools and setup the crontab script, if the link is not working the script is below

nano install.megaraid_sas.sh  copy and paste below commands

 

#!/bin/bash
#
# Install RAID controller tools and crontab script for LSI MegaRAID SAS (megaraid_sas).
#
#

function setup_gentoo()
{
emerge sys-block/megacli
}

{
wget http://hwraid.le-vert.net/debian/pool-wheezy/megacli_8.04.07-1_amd64.deb
dpkg -i megacli_8.04.07-1_amd64.deb
}

{
wget http://it.bmc.uu.se/andlov/docs/linux/raid/files/megacli-8.04.07-2.x86_64.rpm
rpm -ihv megacli-8.04.07-2.x86_64.rpm
}

function setup_slackware()
{
http://hwraid.le-vert.net/debian/pool-wheezy/megacli_8.04.07-1_amd64.deb
alien -t megacli_8.04.07-1_amd64.deb
installpkg megacli-8.04.07.txz
}

function setup_crontab()
{
if ! [ -e /etc/cron.hourly/megacli ]; then
mv /etc/cron.hourly/megacli /etc/cron.hourly/megacli.old
fi

wget http://it.bmc.uu.se/andlov/docs/linux/raid/files/megacli.cron
mv megacli.cron /etc/cron.hourly/megacli
}

case “$1” in
gentoo)
setup_gentoo
setup_crontab
;;
debian)
setup_debian
setup_crontab
;;
redhat)
setup_redhat
setup_crontab
;;
slackware)
setup_slackware
setup_crontab
;;
*)
echo “usage: $0 {gentoo|debian|redhat|slackware}”
exit 1
esac

 

You need to install the proprietary megacli command. This tool was created by LSI Logic and can be downloaded from their site. It is also available as a Debian package from http://hwraid.le-vert.net/debian/pool-wheezy/.

 

The lsi.sh MegaCLI interface script

Once you have MegaCLI installed, the following is a script to help in getting information from the raid card. The shell script does nothing more then execute the commands you normally use on the CLI. The script can show the status of the raid and drives. You can identify any drive slot by using the blinking light on the chassis. The script can help you identify drives which are starting to error out or slow down the raid so you can replace drives early. We have also included a “setdefaults” method to setup a new raid card to specs we use for our 1000+ raids but check your setup first as new hardware comes out all the time which can enable new features not yet supported by this script. Finally, use the “checkNemail” method to check the raid status and mail you with a list of drives and which one is reporting the problem.

You are welcome to copy and paste the following script. We call the script “lsi.sh”, but you can use any name you wish. just make sure to set the full path to the MegaCli binary in the script and make the script executable. We tried to comment every method so take a look at the script before using it.

chmod +x lsi.sh

 

#!/bin/bash
#
# Enterprisevpsolutions.com 
#     http://kb.enterprisevpssolutions.com/lsi-megaraid-guide-centos/
#     LSI MegaRaid CLI 
#     lsi.sh @ Version 0.06
#
# description: MegaCLI script to configure and monitor LSI raid cards.

# Full path to the MegaRaid CLI binary Each system is different please adjust where needed if you need help send us a support request and we would be happy to help.
MegaCli="/usr/sbin/megacli"

# The identifying number of the enclosure. Default for our systems is "8". Use
# "MegaCli64 -PDlist -a0 | grep "Enclosure Device"" to see what your number
# is and set this variable.
ENCLOSURE="8"

if [ $# -eq 0 ]
   then
    echo ""
    echo "            OBPG  .:.  lsi.sh $arg1 $arg2"
    echo "-----------------------------------------------------"
    echo "status        = Status of Virtual drives (volumes)"
    echo "drives        = Status of hard drives"
    echo "ident \$slot   = Blink light on drive (need slot number)"
    echo "good \$slot    = Simply makes the slot \"Unconfigured(good)\" (need slot number)"
    echo "replace \$slot = Replace \"Unconfigured(bad)\" drive (need slot number)"
    echo "progress      = Status of drive rebuild"
    echo "errors        = Show drive errors which are non-zero"
    echo "bat           = Battery health and capacity"
    echo "batrelearn    = Force BBU re-learn cycle"
    echo "logs          = Print card logs"
    echo "checkNemail   = Check volume(s) and send email on raid errors"
    echo "allinfo       = Print out all settings and information about the card"
    echo "settime       = Set the raid card's time to the current system time"
    echo "setdefaults   = Set preferred default settings for new raid setup"
    echo ""
   exit
 fi

# General status of all RAID virtual disks or volumes and if PATROL disk check
# is running.
if [ $1 = "status" ]
   then
      $MegaCli -LDInfo -Lall -aALL -NoLog
      echo "###############################################"
      $MegaCli -AdpPR -Info -aALL -NoLog
      echo "###############################################"
      $MegaCli -LDCC -ShowProg -LALL -aALL -NoLog
   exit
fi

# Shows the state of all drives and if they are online, unconfigured or missing.
if [ $1 = "drives" ]
   then
      $MegaCli -PDlist -aALL -NoLog | egrep 'Slot|state' | awk '/Slot/{if (x)print x;x="";}{x=(!x)?$0:x" -"$0;}END{print x;}' | sed 's/Firmware state://g'
   exit
fi

# Use to blink the light on the slot in question. Hit enter again to turn the blinking light off.
if [ $1 = "ident" ]
   then
      $MegaCli  -PdLocate -start -physdrv[$ENCLOSURE:$2] -a0 -NoLog
      logger "`hostname` - identifying enclosure $ENCLOSURE, drive $2 "
      read -p "Press [Enter] key to turn off light..."
      $MegaCli  -PdLocate -stop -physdrv[$ENCLOSURE:$2] -a0 -NoLog
   exit
fi

# When a new drive is inserted it might have old RAID headers on it. This
# method simply removes old RAID configs from the drive in the slot and make
# the drive "good." Basically, Unconfigured(bad) to Unconfigured(good). We use
# this method on our FreeBSD ZFS machines before the drive is added back into
# the zfs pool.
if [ $1 = "good" ]
   then
      # set Unconfigured(bad) to Unconfigured(good)
      $MegaCli -PDMakeGood -PhysDrv[$ENCLOSURE:$2] -a0 -NoLog
      # clear 'Foreign' flag or invalid raid header on replacement drive
      $MegaCli -CfgForeign -Clear -aALL -NoLog
   exit
fi

# Use to diagnose bad drives. When no errors are shown only the slot numbers
# will print out. If a drive(s) has an error you will see the number of errors
# under the slot number. At this point you can decided to replace the flaky
# drive. Bad drives might not fail right away and will slow down your raid with
# read/write retries or corrupt data. 
if [ $1 = "errors" ]
   then
      echo "Slot Number: 0"; $MegaCli -PDlist -aALL -NoLog | egrep -i 'error|fail|slot' | egrep -v ' 0'
   exit
fi

# status of the battery and the amount of charge. Without a working Battery
# Backup Unit (BBU) most of the LSI read/write caching will be disabled
# automatically. You want caching for speed so make sure the battery is ok.
if [ $1 = "bat" ]
   then
      $MegaCli -AdpBbuCmd -aAll -NoLog
   exit
fi

# Force a Battery Backup Unit (BBU) re-learn cycle. This will discharge the
# lithium BBU unit and recharge it. This check might take a few hours and you
# will want to always run this in off hours. LSI suggests a battery relearn
# monthly or so. We actually run it every three(3) months by way of a cron job.
# Understand if your "Current Cache Policy" is set to "No Write Cache if Bad
# BBU" then write-cache will be disabled during this check. This means writes
# to the raid will be VERY slow at about 1/10th normal speed. NOTE: if the
# battery is new (new bats should charge for a few hours before they register)
# or if the BBU comes up and says it has no charge try powering off the machine
# and restart it. This will force the LSI card to re-evaluate the BBU. Silly
# but it works.
if [ $1 = "batrelearn" ]
   then
      $MegaCli -AdpBbuCmd -BbuLearn -aALL -NoLog
   exit
fi

# Use to replace a drive. You need the slot number and may want to use the
# "drives" method to show which drive in a slot is "Unconfigured(bad)". Once
# the new drive is in the slot and spun up this method will bring the drive
# online, clear any foreign raid headers from the replacement drive and set the
# drive as a hot spare. We will also tell the card to start rebuilding if it
# does not start automatically. The raid should start rebuilding right away
# either way. NOTE: if you pass a slot number which is already part of the raid
# by mistake the LSI raid card is smart enough to just error out and _NOT_
# destroy the raid drive, thankfully.
if [ $1 = "replace" ]
   then
      logger "`hostname` - REPLACE enclosure $ENCLOSURE, drive $2 "
      # set Unconfigured(bad) to Unconfigured(good)
      $MegaCli -PDMakeGood -PhysDrv[$ENCLOSURE:$2] -a0 -NoLog
      # clear 'Foreign' flag or invalid raid header on replacement drive
      $MegaCli -CfgForeign -Clear -aALL -NoLog
      # set drive as hot spare
      $MegaCli -PDHSP -Set -PhysDrv [$ENCLOSURE:$2] -a0 -NoLog
      # show rebuild progress on replacement drive just to make sure it starts
      $MegaCli -PDRbld -ShowProg -PhysDrv [$ENCLOSURE:$2] -a0 -NoLog
   exit
fi

# Print all the logs from the LSI raid card. You can grep on the output.
if [ $1 = "logs" ]
   then
      $MegaCli -FwTermLog -Dsply -aALL -NoLog
   exit
fi

# Use to query the RAID card and find the drive which is rebuilding. The script
# will then query the rebuilding drive to see what percentage it is rebuilt and
# how much time it has taken so far. You can then guess-ti-mate the
# completion time.
if [ $1 = "progress" ]
   then
      DRIVE=`$MegaCli -PDlist -aALL -NoLog | egrep 'Slot|state' | awk '/Slot/{if (x)print x;x="";}{x=(!x)?$0:x" -"$0;}END{print x;}' | sed 's/Firmware state://g' | egrep build | awk '{print $3}'`
      $MegaCli -PDRbld -ShowProg -PhysDrv [$ENCLOSURE:$DRIVE] -a0 -NoLog
   exit
fi

# Use to check the status of the raid. If the raid is degraded or faulty the
# script will send email to the address in the $EMAIL variable. We normally add
# this method to a cron job to be run every few hours so we are notified of any
# issues.
if [ $1 = "checkNemail" ]
   then
      EMAIL="raidadmin@localhost"

      # Check if raid is in good condition
      STATUS=`$MegaCli -LDInfo -Lall -aALL -NoLog | egrep -i 'fail|degrad|error'`

      # On bad raid status send email with basic drive information
      if [ "$STATUS" ]; then
         $MegaCli -PDlist -aALL -NoLog | egrep 'Slot|state' | awk '/Slot/{if (x)print x;x="";}{x=(!x)?$0:x" -"$0;}END{print x;}' | sed 's/Firmware state://g' | mail -s `hostname`' - RAID Notification' $EMAIL
      fi
fi

# Use to print all information about the LSI raid card. Check default options,
# firmware version (FW Package Build), battery back-up unit presence, installed
# cache memory and the capabilities of the adapter. Pipe to grep to find the
# term you need.
if [ $1 = "allinfo" ]
   then
      $MegaCli -AdpAllInfo -aAll -NoLog
   exit
fi

# Update the LSI card's time with the current operating system time. You may
# want to setup a cron job to call this method once a day or whenever you
# think the raid card's time might drift too much. 
if [ $1 = "settime" ]
   then
      $MegaCli -AdpGetTime -aALL -NoLog
      $MegaCli -AdpSetTime `date +%Y%m%d` `date +%H:%M:%S` -aALL -NoLog
      $MegaCli -AdpGetTime -aALL -NoLog
   exit
fi

# These are the defaults we like to use on the hundreds of raids we manage. You
# will want to go through each option here and make sure you want to use them
# too. These options are for speed optimization, build rate tweaks and PATROL
# options. When setting up a new machine we simply execute the "setdefaults"
# method and the raid is configured. You can use this on live raids too.
if [ $1 = "setdefaults" ]
   then
      # Read Cache enabled specifies that all reads are buffered in cache memory. 
       $MegaCli -LDSetProp -Cached -LAll -aAll -NoLog
      # Adaptive Read-Ahead if the controller receives several requests to sequential sectors
       $MegaCli -LDSetProp ADRA -LALL -aALL -NoLog
      # Hard Disk cache policy enabled allowing the drive to use internal caching too
       $MegaCli -LDSetProp EnDskCache -LAll -aAll -NoLog
      # Write-Back cache enabled
       $MegaCli -LDSetProp WB -LALL -aALL -NoLog
      # Continue booting with data stuck in cache. Set Boot with Pinned Cache Enabled.
       $MegaCli -AdpSetProp -BootWithPinnedCache -1 -aALL -NoLog
      # PATROL run every 672 hours or monthly (RAID6 77TB @60% rebuild takes 21 hours)
       $MegaCli -AdpPR -SetDelay 672 -aALL -NoLog
      # Check Consistency every 672 hours or monthly
       $MegaCli -AdpCcSched -SetDelay 672 -aALL -NoLog
      # Enable autobuild when a new Unconfigured(good) drive is inserted or set to hot spare
       $MegaCli -AdpAutoRbld -Enbl -a0 -NoLog
      # RAID rebuild rate to 60% (build quick before another failure)
       $MegaCli -AdpSetProp \{RebuildRate -60\} -aALL -NoLog
      # RAID check consistency rate to 60% (fast parity checks)
       $MegaCli -AdpSetProp \{CCRate -60\} -aALL -NoLog
      # Enable Native Command Queue (NCQ) on all drives
       $MegaCli -AdpSetProp NCQEnbl -aAll -NoLog
      # Sound alarm disabled (server room is too loud anyways)
       $MegaCli -AdpSetProp AlarmDsbl -aALL -NoLog
      # Use write-back cache mode even if BBU is bad. Make sure your machine is on UPS too.
       $MegaCli -LDSetProp CachedBadBBU -LAll -aAll -NoLog
      # Disable auto learn BBU check which can severely affect raid speeds
       OUTBBU=$(mktemp /tmp/output.XXXXXXXXXX)
       echo "autoLearnMode=1" > $OUTBBU
       $MegaCli -AdpBbuCmd -SetBbuProperties -f $OUTBBU -a0 -NoLog
       rm -rf $OUTBBU
   exit
fi

### EOF ###


On our Ubuntu Linux 64bit and FreeBSD 64bit servers we simply copied MegaCli64 (64bit) to /usr/local/sbin/ . You can put the binary anywhere you want, but we choose /usr/local/sbin/ because it is in root's path. Make sure to secure the binary. Make the owner root and chmod the binary to 700 (chown root /usr/local/sbin/MegaCli64; chmod 700 /usr/local/sbin/MegaCli64). The install is now done. We would like to see LSI make a Ubuntu PPA or FreeBSD ports entry sometime in the future, but this setup was not too bad.

How do I use the lsi.sh script ?

First, execute the script without any arguments. The script will print out the “help” statement showing all of the available commands and a very short description of the function. Inside the script you can also see we also put in detailed comments.

kbadmin has written 146 articles

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