Quick Start

Quick start guide to adding, formatting, mounting, expanding and deleting disks (block storage) on centron and ccloud³.

Adding new disks to ccloud³ VMs

You can add a new volume to an existing ccloud³ VM, or do so whilst creating a new ccloud³ VM.

Alternatively, on the page for creating ccloud³ VMs, in the ‘Add block storage’ section, you can click ‘Add volume’.

Select the size of your disk, which can be between 1 GB and 5 TB.

Format and mount a disk

This happens automatically for supported operating systems. Instructions on how to format and mount the disk manually can be found in the disk’s ‘More’ menu under ‘Configuration instructions’.

Both the automatic and manual set-up procedures format the volume using "ext4", mount it to "/mnt" with the options defaults, nofail, discard and noatime, and update /etc/fstab to ensure it is mounted permanently after a reboot.

Increasing the size of disks

If you need more storage space, you can increase the size of a disk.

Enlarge the volume yourself. In the ‘More’ menu for the disk, select ‘Increase size’. In the ‘Increase Disk Size’ window, enter a new size in GB (at least 1 GB larger than the current size) and click ‘Enlarge Disk’. Extend the file system to utilise the additional space. For ext4, use resize2fs. For XFS, use xfs_growfs. Disks are unpartitioned by default, but if you manually partitioned your volume when creating it, you must extend the last partition before extending the file system.

You cannot reduce the size of a disk, as this poses a risk of data loss and file system corruption.

Deleting discs

Deleting a disk permanently and irrevocably destroys the volume and its contents.

Open the ‘More’ menu on the disc and select ‘Delete’. In the ‘Delete Volume’ window that opens, confirm the deletion.