Disk resizing overview

Scenarios

You can resize the volume of a disk to meet the needs of different scenarios, including the need to:

• Increase the system disk size. You can extend the existing partitions or newly added partitions.
• Create a cloud disk and attach the cloud disk to the instance as a data disk. After, you need to partition and format the cloud disk.
• Replace the system disk and specify a higher system disk capacity.

Procedures for disk resizing

The following table describes the process of how to resize a cloud disk based on its current status.

Limits of resizing a system disk

When you resize a system disk, the new size of the system disk must be greater than its current size, but must be less than or equal to 500 GiB. The following table describes the limits of system disk resizing for different images.

For example, if the system disk size of a CentOS instance is 35 GiB, it must be greater than 35 GiB and must be less than or equal to 500 GiB after being resized.

Upper limit of data disk resizing

After being resized, the new size of the data disk must be greater than its current size. The following table describes the upper limit of data disk resizing for different cloud disk.