Knowledge base

By default, unmanaged Cloud Servers are supplied with two volumes:

• 1 volume for the operating system of your choice (/dev/vda)
• 1 volume for storing your data (/dev /vdb)

The volume for data storage (/dev/vdb) must be formatted, then mounted by the client.

1. SSH commands to format the storage volume

If you choose XFS for example, it is necessary to format the volume using the following SSH command:

sudo mkfs.xfs -f /dev/vdb

And if you choose EXT4:

sudo mkfs.ext4 /dev/vdb

If necessary, you can format the volume with a different file system supported by your distribution.

2. SSH commands for mounting the storage volume

sudo mount /dev/vdb point_de_montage

SSH login support

For example, to mount the data volume in the /home directory of your Cloud Server, the command to execute is as follows:

sudo mount /dev/vdb /home

Warning: if you mount your data volume in /home, you will no longer be able to log in to your home server via your private key the next time you restart (becuse SSH will look for the keys in the ".ssh" file in the home (home folder) of the user and if the data volume is mounted on this folder, the keys are lost). As a result, it is necessary to copy the data to be kept first. For example, in root:

mkdir /mnt/home
mount /dev/vdb /mnt/home
rsync -rlptgoDHAX /home/ /mnt/home/
umount /mnt/home
mount /dev/vdb /home
rmdir /mnt/home
What that means in order:

• you create a temporary folder
• you mount the volume on the temporary folder
• you copy the contents of the original "/home" folder to the root of the volume keeping the same rights, owner, group, etc.(warning: you might need to install the "rsync" bundle depending on the Linux distribution chosen)
• you dismount the volume from the temporary folder
• you mount the volume on the "/home" folder
• you delete the temporary folder

This way you should be able to mount the volume on "/home" while keeping the initial configuration which is installed. We recommend that you create a password for "root" in any case so that you do not lose your way if you should make a mistake. The password can be removed afterwards.

Alternative solution: not mounting in "/home"...
This is a standard place to mount the data volume because it is generally in "/home" that users will work and particularly store their data. A user without special rights will usually be limited to their "/home/user" directory. It is possible to indicate another default directory for a user (but the configuration will no longer be "standard").

Another alternative solution: Automatically mounting the volume on startup
A mount does not effectively withstand a restart. If you do not want to make the change permanent, you can add your volume to the file "/etc/fstab". Debian documents about this:https://wiki.debian.org/fr/fstab