# Expanding the Local Disks of a Disk-intensive ECS

#### Scenarios

Disk-intensive ECSs can use both local disks and EVS disks to store data. Local disks are generally used to store service data and feature higher throughput than EVS disks.

Disk-intensive ECSs do not support modifying specifications. Therefore, when the idle capacity of the local disks of such an ECS is insufficient, you must create a new disk-intensive ECS with higher specifications for capacity expansion. In such a case, the data stored in the original ECS can be migrated to the new ECS through an EVS disk.

#### Procedure

1. Create an EVS disk according to the volume of data to be migrated.
2. Attach the EVS disk to the disk-intensive ECS.
3. Back up the data stored in the local disks to the EVS disk that is newly attached to the disk-intensive ECS.
4. Detach the EVS disk from the ECS.
   1. On the Elastic Cloud Server page, select this disk-intensive ECS and ensure that it is Stopped.

      If the ECS is in the Running state, choose More > Stop to stop it.

   2. Click the name of the disk-intensive ECS. The page providing details about the ECS is displayed.
   3. Click the Disks tab. Locate the row containing the EVS data disk and click Detach to detach the disk from the ECS.
5. Ensure that a new disk-intensive ECS with higher specifications than the original one is available.

   The idle local disk capacity of the new ECS must meet service requirements.

6. Attach the EVS disk to the new disk-intensive ECS.

   On the Elastic Cloud Server page, click the name of the ECS described in step 5. The page providing details about the ECS is displayed.

7. Click the Disks tab. Then, click Attach Disk.

   In the displayed dialog box, select the EVS disk detached in step 4 and the device name.

8. Migrate the data from the EVS disk to the local disks of the new disk-intensive ECS.

Parent topic: EVS Disks