Increasing the size of a partition

Reviewed on October 13, 2025

The growpart utility allows you to resize partitions. If you have increased the size of the partition's underlying volume, for example, you can increase the size of the partition to make use of the additional space.

Before you start

To complete the actions presented below, you must have:

• A Scaleway account logged into the console
• Owner status or IAM permissions allowing you to perform actions in the intended Organization
• An Instance
• Attached an additional Block Storage volume to your Instance

1. Connect to your Instance using SSH.

2. Use the lsblk command to identify your volume partition. Ensure that the partition is not mounted before you resize it. In the following example, we are resizing sdb1:

   root@scw-festive-agnesi:~# lsblk
   NAME    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
   sda       8:0    0  23.3G  0 disk
   ├─sda1    8:1    0  23.2G  0 part /
   ├─sda14   8:14   0     4M  0 part
   └─sda15   8:15   0   106M  0 part /boot/efi
   sdb       8:16   0 38.6G  0 disk
   └─sdb1    8:17   0 18.6G  0 part

3. Use growpart to increase the partition size of your Block Storage volume (here sdb1):

   # Replace /dev/sdX 1 with the name of your partition
   growpart /dev/sdX 1

   An output similar to the following displays:

   CHANGED: partition=1 start=0 old: size=39061504 end=39061504 new: size=58490880 end=58490880

4. Use lsblk to check that the partition was correctly resized. In the following output, you can see that our partition sbd1 went from 18.6G (step 2) to 27.9G.

   root@scw-festive-agnesi:~# lsblk
   NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
   sda       8:0    0 18.6G  0 disk
   ├─sda1    8:1    0 18.5G  0 part /
   ├─sda14   8:14   0    4M  0 part
   └─sda15   8:15   0  106M  0 part /boot/efi
   sdb       8:16   0 27.9G  0 disk
   └─sdb1    8:17   0 27.9G  0 part