Process Overview

EVS disks can be attached to servers to be used as system disks or data disks. Table 1 lists the methods for purchasing disks.

**Table 1** Method for purchasing disks
Disk	Description	Method
System disks	System disks are purchased along with servers and cannot be purchased separately.	Purchasing an ECS Creating a BMS
Data disks	Data disks can be purchased along with servers or separately.	Purchasing an ECS Creating a BMS Purchasing an EVS Disk

Figure 1 shows how to purchase a data disk separately.

Figure 1 Process for purchasing a data disk separately

Preparations: Register with Huawei Cloud, and top up your account. For details, see Step 1: Making Preparations.
Purchase an EVS disk: Set the disk type, capacity, and name. For details, see Purchasing an EVS Disk.
Attach a data disk: Attach the separately purchased disk to a server. For details, see the following sections:
- Attaching a non-shared disk
- Attaching a shared disk
Initialize the data disk: Log in to the server and initialize the data disk before using it. For details about how to initialize the disk, see the following sections: