Can I Transfer the Data Disk Capacity to a System Disk?

Sorry, you cannot.

Currently, the capacity of an EVS disk cannot be transferred to another disk. Multiple EVS disks cannot be combined into a single, larger disk, either.

Common Scenarios

1. You want to expand the system disk capacity, but created a new data disk.
2. You want to expand the system disk capacity, but expanded the data disk capacity.

Recommended Solution

• If you do not need the data on the data disk, you can just delete the data disk, and then expand the system disk.
• If you need the data on the data disk, you can create a small-capacity data disk, copy data from the original data disk to the new data disk, and then expand the system disk capacity.
  1. Back up the data disk using the CBR service or by creating a snapshot.

     For details about backups, see section "Managing EVS Backups" in the Elastic Volume Service User Guide. For details about snapshots, see Creating a Snapshot.

  2. Create a new data disk with the desired capacity and attach it to the server. After initializing the disk, copy the data from the original data disk to the new data disk.
  3. Confirm that the services on the new data disk are available. Then, delete the original data disk, and delete the created backup.
  4. Expand the system disk capacity by referring to Disk Capacity Expansion.