You can modify several parameters of an existing EBS volume, including volume size, volume type, and IOPS capacity. If your EBS volume is attached to a current-generation EC2 instance type, you might be able to apply these changes without stopping the instance or detaching the volume from it. For more information about modifying EBS volumes, see
Amazon EBS Elastic Volumes in the
Amazon EBS User Guide.
When you complete a resize operation on your volume, you need to extend the volume's file-system size to take advantage of the new storage capacity. For more information, see
Extend the file system.
For more information, see
Monitor the progress of volume modifications in the
Amazon EBS User Guide.
With previous-generation instance types, resizing an EBS volume might require detaching and reattaching the volume or stopping and restarting the instance.
After you initiate a volume modification, you must wait for that modification to reach the
completed state before you can initiate another modification for the same volume. You can modify a volume up to four times within a rolling 24-hour period, as long as the volume is in the
in-use or
available state, and all previous modifications for that volume are
completed. If you exceed this limit, you get an error message that indicates when you can perform your next modification.