# Key Concepts



## Disk Name

User-defined name of the cloud disk.

## Disk Capacity

The size of the cloud disk.

## Mount Point

The position where the cloud disk is mounted on the cloud host.

## Resource ID

After the user creates a cloud disk, the system will automatically generate a resource ID, which is globally unique.

## Expansion

When the capacity of the cloud disk is unable to support the business, you can upgrade the cloud disk by expansion.

## Mounting and Unmounting

The operations of the user to mount the cloud disk to the cloud host and unmount the cloud disk from the cloud host.

## Snapshot

Snapshot is an effective disk management function to prevent data loss and protect data integrity.

Through creating a snapshot of cloud disk in seconds, you can keep the state of a certain point in time of the cloud disk, and create a new cloud disk from the snapshot when you need to restore it.

## Offline (Windows)

The dismount operation of the cloud disk.