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You may want to create additional storage volumes or disks to attach to your VMs in addition to the root volume where the operating system resides.

Creating the instance

1. Follow the steps described in Provision a new instance - web
2. When congiruing the volumes, create a new one clicking on the + sign and customise the label and size
    
3. Complete the process until the new instance is up and running.

Configuring the extra volume in the new instance

That extra volume is not mounted (or even formatted) by default. You must log in to your freshly created instance, and then follow the instructions below:

1. You may need to trigger a rescan of the new block device, typically named vd*. We assume here the name of the extra volume is vdb:

sudo echo 1 > /sys/class/block/vdb/device/rescan

or, alternatively:

sudo apt-get install scsitools # or yum install scitools for CentOS
sudo rescan-scsi-bus.sh

Then you will be able to see the vdb disk when you run lsblk.

1. Create a partition and format it. You may use parted to do all in one go:

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   sudo parted -s -a optimal -- /dev/vdb mkpart primary ext4 0% 100%

   
   

   
   

   Info
   You may partition the disk differently and use any other filesystem type.

   
   

2. Add this entry to your VM's  /etc/fstab:

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   echo "/dev/vdb1 /data1 ext4 defaults 0 0" | sudo tee -a /etc/fstab > /dev/null

   If your VM uses disk IDs then use the following command to find the vdb ID and amend the line above as required:
   

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   ​echo "UID-$(blkid /dev/vdb) /data1 ext4 defaults 0 0" | sudo tee -a /etc/fstab > /dev/null

   
   

3. Make the directory where you are mounting your filesystem. Make sure you use the same path as defined in fstab:

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   sudo mkdir /data1

   
   

4. Mount the file system

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   sudo mount -av

   
   

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