So you just created a brand new drive to your VM. So now you need you VM to add this new data disk. So here is the short version of Azure instructions:
sudo grep SCSI /var/log/messages
locate the name of the new drive (if it is your second drive it should be /dev/sdc
sudo fdisk /dev/sdc
now we simply follow prompts: n p p w
sudo mkfs -t ext4 /dev/sdc1
this command will create the actual fielsystem usually default values are OK but if you know what you need enter the your values at the prompts – to accept default just press
sudo mkdir /datadrive
make directory for the drive to be mounted to
sudo mount /dev/sdc1 /datadrive
mount the drive pm your chosen directory (in our example it is /datadrive
sudo -i blkid
get the drive UUID for the fstab file we need to create
sudo vi /etc/fstab
edit the fstab file and enter the UDDID and mount point to let system mount this data drive at boot time
UUID=33333333-3b3b-3c3c-3d3d-3e3e3e3e3e3e /datadrive ext4 defaults 1 2
sample format line from vstab for our drive
Lastly dismount the drive and mout it again to make sure that all is correct in the fstab file:
sudo umount /datadrive
sudo mount /datadrive
That’s it your drive will not be accessible (mind your permissions of course) and will be reattached tot he system when the system reboots.
Cheers