SMART HDD

• https://help.ubuntu.com/community/Smartmontools
• http://wiki.mattrude.com/images/6/67/Google_disk_failures.pdf

• Reallocated_Sector_Ct - number of sectors moved due to an error on the disk
• UDMA_CRC_Error_Count - number of errors between the controller and the disk
• Raw_Read_Error_Rate
• Seek_Error_Rate
• Temperature_Celsius

Install smartmontools

• yum install smartmontools
• apt-get install smartmontools snmp-mibs-downloader

Bash script

# check_smart.sh sat+megaraid,0 /dev/sda Reallocated_Sector_Ct
echo `smartctl -A -d $1 $2 | awk -v ATTRIBUTE_NAME=$3 '$0 ~ ATTRIBUTE_NAME {print $10}'`

Install MegaRAID MegaCLI

• http://www.lsi.com/downloads/Public/MegaRAID%20Common%20Files/8.04.07_MegaCLI.zip

• http://it.bmc.uu.se/andlov/docs/linux/raid/files/megacli-8.04.07-2.x86_64.rpm

• http://it.bmc.uu.se/andlov/docs/linux/raid/megaraid_sas.php

• rpm -ihv megacli-8.04.07-2.x86_64.rpm

• Show physical disks from first controller:

• megacli -PDList -a0

• http://artipc10.vub.ac.be/wordpress/2011/09/12/megacli-useful-commands

• http://wiki.hetzner.de/index.php/LSI_RAID_Controller/en

• http://hwraid.le-vert.net/wiki/LSIMegaRAIDSAS

How to read the SMART values of the drive in RAID

• /opt/MegaRAID/MegaCli/MegaCli64 -PDList -aAll | grep 'Device Id'
• megacli -pdlist -a0 | grep 'Device Id'
• smartctl -d sat+megaraid,4 -a /dev/sda
• smartctl -d megaraid,4 -a /dev/sda