Overview

As business rapidly grows, the capacity of an EBS volume may not meet the higher requirements brought by the growth of business and application data. In this case, you can expand the capacity of the EBS volume. EBS allows you to expand the capacity of an EBS volume in multiple ways.

Scenarios

Both system disks and data disks support capacity expansion. The following table describes the entries that allow you to expand the capacity of an EBS volume.

Capacity expansion methods

The following table describes the methods that you can use to expand the capacity of an EBS volume. You can choose one of the methods based on their limits and the status of the EBS volume.

Note:
After you expand the capacity of an EBS volume in the EBS console, the expanded capacity is not available for use yet. You must log in to the KEC instance to which the EBS volume is attached and resize partitions and file systems, so that the KEC instance can recognize and use the expanded capacity.

Resize partitions and file systems

Log in to the KEC console and resize partitions and file systems. The following table describes the methods for resizing partitions and file systems in different scenarios.

Upper limits on capacity for EBS volumes

When you expand the capacity of an EBS volume, the capacity after the expansion must be greater than the original capacity but cannot exceed the corresponding upper limit.

Upper limits on capacity for system disks

When you expand the capacity of a system disk, the capacity after the expansion must be greater than the original capacity but no more than 500 GB. The following table describes the upper limits on capacity for different types of system disks.

Upper limits on capacity for data disks

When you expand the capacity of a data disk, the capacity after the expansion must be greater than the original capacity. The following table describes the upper limits on capacity for different types of data disks.