# How Can I View My Disk Usage?

You can view your disk usages in either of the following ways:

- Install Agent to View Disk Usage
- View disk usages manually.

  The details depend on the OS. This FAQ uses Windows Server 2008, Windows Server 2016, and Linux as samples to describe how to view the disk usage.

  - Windows Server 2008
  - Windows Server 2016
  - Linux

#### Install Agent to View Disk Usage

Some disk monitoring metrics require that the agent to be installed.

- For instructions about how to install the agent on a Windows ECS, see "Installing and Configuring the Agent (Windows)" in the Cloud Eye User Guide.
- For instructions about how to install the agent on a Linux ECS, see "Installing and Configuring the Agent (Linux)" in the Cloud Eye User Guide.

Table 1 Disk metrics
Metric | Parameter | Description | Value Range | Monitored Object | Monitoring Period (Raw Data)
--- | --- | --- | --- | --- | ---

mountPointPrefix_disk_free

(Agent) Available Disk Space

Free space on the disks

Unit: GB

- Linux: Run the df -h command to check the value in the Avail column. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).
- Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).

≥ 0

ECS

1 minute

mountPointPrefix_disk_total

(Agent) Disk Storage Capacity

Total space on the disks, including used and free

Unit: GB

- Linux: Run the df -h command to check the value in the Size column.

  The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).

- Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).

≥ 0

ECS

1 minute

mountPointPrefix_disk_used

(Agent) Used Disk Space

Used space on the disks

Unit: GB

- Linux: Run the df -h command to check the value in the Used column. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).
- Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).

≥ 0

ECS

1 minute

mountPointPrefix_disk_usedPercent

(Agent) Disk Usage

Percentage of total disk space that is used, which is calculated as follows: Disk Usage = Used Disk Space/Disk Storage Capacity

Unit: percent

- Linux: It is calculated as follows: Used/Size. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).
- Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).

0-100

ECS

1 minute

#### Windows Server 2008

In this section, Windows Server 2008 R2 Enterprise 64bit is used as an example.

1. On the desktop of the server, right-click Computer and choose Manage from the shortcut menu.

   The Server Manager window is displayed.

2. In the navigation tree on the left, choose Storage > Disk Management.

   The sizes and available spaces of the volumes on the current disk are displayed in the middle pane.

   Figure 1 Disk Management page

#### Windows Server 2016

In this section, Windows Server 2016 Standard 64bit is used as an example.

1. On the desktop of the server, click the start icon in the lower left corner.

   The Windows Server window is displayed.

2. Click Server Manager.

   The Server Manager window is displayed.

   Figure 2 Server Manager page
3. In the upper right corner, choose Tools > Computer Management.
4. Choose Storage > Disk Management.

   In the middle pane, you can view the sizes and available spaces of the volumes on the disk.

   Figure 3 Disk list page

#### Linux

In this section, CentOS 7.4 64bit is used as an example. The details depend on if you need to view the available space or not.

- To query the total capacity only, run lsblk.
  Information similar to the following is displayed:

      [root@ecs-test-0001 ~]# lsblk
      NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
      vda    253:0    0   40G  0 disk
      └─vda1 253:1    0   40G  0 part /
      vdb    253:16   0   40G  0 disk
      └─vdb1 253:17   0   40G  0 part

  In the command output, the server has two disks, /dev/vda and /dev/vdb. System disk /dev/vda has 40 GB of capacity, as does data disk /dev/vdb.

- To query the total capacity and display the space available as well, run df -TH. Ensure that the disk has been attached and initialized before running this command.

  Information similar to the following is displayed:

      [root@ecs-0001 ~]# df -TH
      Filesystem     Type      Size  Used Avail Use% Mounted on
      /dev/vda1      ext4       43G  2.0G   39G   5% /
      devtmpfs       devtmpfs  509M     0  509M   0% /dev
      tmpfs          tmpfs     520M     0  520M   0% /dev/shm
      tmpfs          tmpfs     520M  7.2M  513M   2% /run
      tmpfs          tmpfs     520M     0  520M   0% /sys/fs/cgroup
      tmpfs          tmpfs     104M     0  104M   0% /run/user/0
      /dev/vdb1      ext4       43G   51M   40G   1% /mnt/sdc

  In the command output, the server has two partitions, /dev/vda1 and /dev/vdb1. Partition /dev/vda1 is used to deploy the OS, and its total capacity, used capacity, and available capacity are 43 GB, 2 GB, and 39 GB, respectively. Partition /dev/vdb1's total capacity, used capacity, and available capacity are 43 GB, 51 MB, and 40 GB, respectively.

Parent topic: Capacity