Quickly Creating and Using an EVS Disk

1. Log in to the management console and choose Storage > Elastic Volume Service to switch to the EVS console.
2. Click Buy Disk.

1. The disk and the server must be in the same AZ.
2. After a disk is attached, the disk can be used only after you have logged in to the server and initialized the disk.

1. Select a billing mode, region, and AZ. In this example, Pay-per-use is selected.
2. Select the data source. In this example, Create from snapshot is selected.

1. The disk and the server must be in the same AZ.
2. You can create a new disk or create the disk from a data source. Data sources include backups, snapshots, and images.

1. Select a disk type. In this example, Ultra-high I/O is selected.

2. Set the disk capacity. In this example, 100 GB is configured.

1. For details about disk types, see Disk Types and Disk Performance.
2. The capacity of a data disk ranges from 10 GB to 32768 GB.

1. Set Share and SCSI parameters. There are two disk devices types: VBD and SCSI. If SCSI is not selected, the disk device type will be VBD. It is recommended that you select Share and SCSI together. In this example, Share and SCSI are not selected.

2. Set the Encryption parameter. In this example, Encryption is not selected.

3. Set the Auto Backup parameter and select the backup policy. In this example, Auto Backup is selected and the default backup policy is used.

1. For details about shared disks, see Shared EVS Disks and Usage Instructions.
2. For details about disk device types, see Device Types and Usage Instructions.

3. For details about disk encryption, see EVS Disk Encryption.

1. Set a disk name. In this example, volume-test is used.

2. Set the disk quantity. In this example, the quantity is set to 1.

1. When the disk is created from a backup, batch creation is not supported, and the disk quantity must be set to 1.
2. When the disk is created from a snapshot, batch creation is not supported, and the disk quantity must be set to 1.

1. In the disk list, locate the row that contains the to-be-attached disk and click Attach in the Operation column.

2. Select the servers where the disk is going to be attached and select a device name for each server. Ensure that the selected servers and the disk are in the same AZ.

1. A shared disk can be attached to a maximum of 16 servers.
2. By simply attaching a shared disk to multiple servers cannot implement file sharing among servers. You also need to set up a shared file system or cluster management system. 

1. In the disk list, locate the row that contains the to-be-attached disk and click Attach in the Operation column.

2. Select a server where the disk is going to be attached and select a device name for the server. Ensure that the selected server and the disk are in the same AZ.

1. A non-shared disk can be attached to one server only.
2. After a disk is attached, the disk can be used only after you have logged in to the server and initialized the disk. For more information, see Introduction to Data Disk Initialization Scenarios and Partition Styles.

1. Log in to the server.

2. Initialize the disk.

1. Before initializing the disk, select an appropriate partition style based on your needs. For details, see Introduction to Data Disk Initialization Scenarios and Partition Styles.
2. To initialize a data disk less than 2 TB, see  Initializing a Linux Data Disk (fdisk).
3. To initialize a data disk greater than 2 TB, see  Initializing a Linux Data Disk Greater Than 2 TB (parted).