hoctinhoc

1. S.M.A.R.T monitoring

Installing S.M.A.R.T drive monitoring

apt-get install smartmontools

Uncomment the “start_smartd=yes” line

vim /etc/default/smartmontools

Now we have to specify which disk drives we want to monitor

vim /etc/smartd.conf

Insert the following lines:

/dev/sda -a -I 194 -W 4,45,55 -R 5 -m <your_email_address>
/dev/sdb -a -I 194 -W 4,45,55 -R 5 -m <your_email_address>
/dev/sdd -a -I 194 -W 4,45,55 -R 5 -m <your_email_address>
/dev/sde -a -I 194 -W 4,45,55 -R 5 -m <your_email_address>


Simulating a drive failure

Simulating a faulty disk and removing it from the array

mdadm --manage /dev/md0 --set-faulty /dev/sdb1
mdadm --manage /dev/md0 --remove /dev/sdb1

Adding again the disk to the array

mdadm --manage /dev/md0 --add /dev/sdb1


Replacing a Faulty Disk

mdadm --manage /dev/md0 --set-faulty /dev/sdb1
mdadm --manage /dev/md1 --set-faulty /dev/sdb2
mdadm --manage /dev/md0 --remove /dev/sdb1
mdadm --manage /dev/md1 --remove /dev/sdb2

Replacing the disk

sfdisk -d /dev/sda | sfdisk /dev/sdb
mdadm --manage /dev/md0 --add /dev/sdb1
mdadm --manage /dev/md1 --add /dev/sdb2
grub-install /dev/sdb

If the Disk is out of Sync you might need to delete the superblock

mdadm --zero-superblock /dev/sdb


Whatching the sync in progress

watch cat /proc/mdstat


Testing that all disks are synchronized

/usr/share/mdadm/checkarray /dev/md0


Now I have Proxmox 3.1-114 running on a software RAID5 with mdadm