The Oracle Cloud Infrastructure Block Volume service lets you expand the size of block volumes and boot volumes. You have several options to increase the size of your volumes:
For more information about the Block Volume service, see the Block Volume FAQ.
You can only increase the size of the volume, you cannot decrease the size.
Note
If cross-region replication is enabled for the volume you want to resize,
before you resize the volume, you must disable cross-region replication. Once the volume
is resized, you can renable cross-region replication for the volume. For more
information about this feature, see Replicating a Volume.
Note
Resizing IDE type boot volumes is not supported. This applies to both offline and online resizing. To workaround this limitation, you can do one of the following:
Terminate the VM instance, ensuring that you keep the boot volume when you terminate the
instance. Resize the boot volume that you have kept, and then launch a new
VM instance, using the resized boot volume as the image source.
Create a clone of the boot volume, resize the boot volume clone, and then launch a new VM instance using the resized boot volume clone as the image source.
Caution
Before you resize a boot or block volume, you should create a backup of the volume.
Note
After a volume has been resized, the first backup on the resized volume will be a full backup. See Volume Backup Types for more information about full versus incremental volume backups.
Required IAM Policy
To use Oracle Cloud Infrastructure, you must be granted security access in a policy by an administrator. This access is required whether you're using the Console or the REST API with an SDK, CLI, or other tool. If you get a message that you don't have permission or are unauthorized, verify with your administrator what type of access you have and which compartment to work in.
Open the navigation menu and click Storage. Under Block Storage, click Block Volumes.
In the Block Volumes list, click the block volume you want to resize.
Click Edit Size or Performance.
Specify the new size in VOLUME SIZE (IN GB). You must specify a larger value than the block volume's current size.
Click Save Changes. This opens a dialog that lists the commands to rescan the disk that you need to run after the volume is provisioned. You need to run these commands so that the operating system identifies the expanded volume size. Click the Copy link to copy the commands, and then click Close to close the dialog.
This procedure describes the process for online resizing for block volumes attached to Windows instances, or other instance types that are not Linux-based.
Open the navigation menu and click Storage. Under Block Storage, click Block Volumes.
In the Block Volumes list, click the block volume you want to resize.
Click Edit Size or Performance.
Specify the new size in VOLUME SIZE (IN GB). You must specify a larger value than the block volume's current size.
Open the navigation menu and click Storage. Under Block Storage, click Block Volumes. In the Block Storage menu on the sidebar, click Boot Volumes.
In the Boot Volumes list, click the boot volume you want to resize.
Click Edit Size or Performance.
Specify the new size in VOLUME SIZE (IN GB). You must specify a larger value than the boot volume's current size.
Click Save Changes. This opens a dialog that lists the commands to rescan the disk that you need to run after the volume is provisioned. You need to run these commands so that the operating system identifies the expanded volume size. Click the Copy link to copy the commands, and then click Close to close the dialog.
Offline Resizing of Block Volumes Using the Console 🔗
With offline resizing, you detach the volume from an instance before you expand the volume size. Once the volume is resized and reattached, you need to extend the partition, but you do not need to rescan the disk.
Considerations When Resizing an Offline Volume
Whenever you detach and reattach volumes, there are complexities and risks for both Linux-based and Windows-based instances. This applies to both paravirtualized and iSCSI attachment types. You should keep the following in mind when resizing volumes:
When you reattach a volume to an instance after resizing, if you are not using consistent device paths, or the instance does not support consistent device paths, device order and path may change. If you are using a tool such as Logical Volume Manager (LVM), you may need to fix the device mappings. For more information about consistent device paths, see Connecting to Volumes With Consistent Device Paths.
When you detach and then reattach an iSCSI-attached volume to an instance, the volume's IP address will increment.
Before you resize a volume, you should create a full backup of the volume.
Open the navigation menu and click Storage. Under Block Storage, click Block Volumes.
In the Block Volumes list, click the block volume you want to resize.
Click Edit Size or Performance.
Specify the new size in VOLUME SIZE (IN GB). You must specify a larger value than the block volume's current size.
Click Save Changes. This opens a dialog that lists the required steps to complete the volume resize. For offline resizing, you need to extend the partition after you reattach the volume. Click Close to close the dialog.