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How to resize a disk

This guide explains how to expand a disk from the Hikube console, then extend its file system in the VM.

Prerequisites​

  • A disk in your project
  • Sufficient storage quota for the new size
No shrinking

Size reduction is not supported. The new size must be greater than or equal to the current size, and at least 20 GB.

Steps​

1. Open the disk edit page​

  1. Open Infrastructure → Disks.
  2. Open the disk's actions menu and choose Edit, or open the disk page and click Edit.

The Edit disk page shows the CURRENT SIZE and the encryption status.

2. Enter the new size​

  1. In New Size (GB), enter the desired size.
  2. Check the Estimated project usage gauge. If the size exceeds the quota, the console displays "The size exceeds the project quota" and the button remains disabled.
  3. Click Save changes.

The console confirms: "The disk was successfully resized to N GB."

3. Extend the file system in the VM​

Resizing expands the block device live, without restarting the VM; the partition and the file system must then be extended from the VM, also without a restart. Connect over SSH and check the new device size:

lsblk

If the new size is still not visible after a few minutes, restart the VM from the console.

Disk formatted without a partition (for example /dev/vdb mounted directly):

# ext4
sudo resize2fs /dev/vdb

# XFS (specify the mount point)
sudo xfs_growfs /mnt/data

Partitioned disk (for example the system disk /dev/vda, partition 1):

# Expand the partition (cloud-guest-utils or cloud-utils-growpart package)
sudo growpart /dev/vda 1

# Then extend the file system
sudo resize2fs /dev/vda1      # ext4
sudo xfs_growfs /             # XFS
tip

Many cloud images automatically extend the root partition at boot (cloud-init). If you prefer not to run growpart yourself, a restart is often enough for a system disk.

Verification​

  • The disk page shows the new Capacity.
  • In the VM, df -h shows the new file system size.

Further reading​