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Connecting to a Server

When using a volume on a server, a connection or disconnection operation is required.
When using a volume on a server, you need to perform a connection or disconnection operation. After adding a connection server on the Block Storage(BM) details page, access the server and perform Multi Path settings and connection operations (Mount, Disk Online). After completing the use, perform disconnection operations (Umount, Disk Offline) and remove the connection server.

Configuring Multi Path

Before using a volume on a connection server, you need to configure Multi Path. Follow the procedure below.

Note
If you do not configure Multi Path, it may affect the service due to maintenance, failures, etc.

Linux Operating System

  1. Click the All Services > Storage > Block Storage(BM) menu. The Block Storage(BM) Service Home page will be displayed.

  2. On the Service Home page, click the Block Storage(BM) menu. The Block Storage(BM) list page will be displayed.

  3. On the Block Storage(BM) list page, click the resource you want to set up Multi Path for. The Block Storage(BM) details page will be displayed.

  4. In the Connected Server section, check the server and access it. Follow the guide below to configure Multi Path.

    • Device confirmation

      1. The created volume can be confirmed using the fdisk -l command.

    • DM-Multipath application confirmation

      1. The Linux system automatically applies Multi Path during the volume recognition process, and you can confirm it using the multipath –ll command.
      2. The volume with Multi Path applied uses a Multipath device name in the format /dev/mapper/#####, not /dev/sd#, and can be confirmed using the fdisk –l command.

    • iSCSI replacement timeout value setting

      1. Set the replacement timeout when connecting to iSCSI.
      # vi /etc/iscsi/iscsid.conf
node.session.timeo.replacement_timeout = 5
(change the default value of 120 to 5)
      1. After changing the above content, restart the iSCSI service
      # systemctl restart iscsid

Windows Operating System

  1. Click the All Services > Storage > Block Storage(BM) menu. The Block Storage(BM) Service Home page will be displayed.

  2. On the Service Home page, click the Block Storage(BM) menu. The Block Storage(BM) list page will be displayed.

  3. On the Block Storage(BM) list page, click the resource you want to set up Multi Path for. The Block Storage(BM) details page will be displayed.

  4. In the Connected Server section, check the server and access it. Follow the guide below to configure Multi Path.

    • Device confirmation

      1. Click the Start > Server Manager menu to run Server Manager.
      2. Click Server Manager > File and Storage Services > Volumes > Disks to confirm the iscsi device.
      3. Before setting up Multi Path, one device appears as multiple devices for each path.

    • MPIO installation (Reboot required)

      1. Click Server Manager > Dashboard > Add roles and features.

      2. The Add Roles and Features Wizard popup window will open. Click the Next button.

      3. On the Select installation type page, select Role-based or feature-based installation and click the Next button.

      4. On the Select destination server page, the current server will be automatically searched. Confirm the content and click the Next button.

      5. On the Select features page, select Features on the left menu and check Multipath I/O. Then, click the Next button.

        MultiPath

      6. On the Confirm installation selections page, check Restart the destination server automatically if required. If a popup window opens, click Yes and then click the Install button.

      7. The installation will start, and the server will automatically reboot.

      8. After reconnecting to the server, the installation will be complete. Click the Close button to close the Wizard popup window.

      9. Click Server Manager > Dashboard > Tools > MPIO.

        MultiPath

      10. On the Discover Multi-Paths tab, check Add support for iSCSI devices and click the Add button.

        • If a message is displayed, reboot the server again.

      11. After the reboot is complete, you can confirm NETAPP Devices in MPIO devices.

        MultiPath

      12. Run diskmgmt.msc in the Windows execution window (command prompt) to open the Disk Management popup window.

        • You can confirm that MPIO is applied through the properties of the volume created in the Block Storage(BM) service.
          MultiPath

Connecting to a Server (Mount, Disk Online)

To use a volume added to a connection server, you need to access the server and perform connection operations (Mount, Disk Online). Follow the procedure below.

Linux Operating System

Server Connection Example Configuration
  • Server OS: LINUX
  • Mount location: /data
  • Volume capacity: 24 GB
  • File system: ext3, ext4, xfs, etc.
  • Additional allocated disk: /dev/vdb

  1. Click the All Services > Storage > Block Storage(BM) menu. The Block Storage(BM) Service Home page will be displayed.

  2. On the Service Home page, click the Block Storage(BM) menu. The Block Storage(BM) list page will be displayed.

  3. On the Block Storage(BM) list page, click the resource you want to connect to the server. The Block Storage(BM) details page will be displayed.

  4. In the Connected Server section, check the server and access it. Follow the guide below to connect (Mount) the volume.

    • Switch to root privileges

      $ sudo -i

    • Confirm the disk

      # lsblk
NAME    MAJ:MIN  RM   SIZE RO TYPE MOUNTPOINT
vda       252:0   0    24G  0 disk
├─vda1    252:1   0  23.9G  0 part [SWAP]
└─vda14   252:14  0     4M  0 part /
└─vda15   252:15  0   106M  0 part /boot/efi
vdb       252:16  0    24G  0 disk

    • Create a partition

      # fdisk /dev/vdb
Command (m for help): n

Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-50331646, default 2048):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-50331646, default 50331646):

Created a new partition 1 of type 'Linux' and of size 24 GiB.

Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.

    • Set the partition format (e.g., ext4)

      # lsblk
NAME    MAJ:MIN  RM   SIZE RO TYPE MOUNTPOINT
vda       252:0   0    24G  0 disk
├─vda1    252:1   0  23.9G  0 part [SWAP]
└─vda14   252:14  0     4M  0 part /
└─vda15   252:15  0   106M  0 part /boot/efi
vdb       252:16  0    24G  0 disk
└─vdb1    252:17  0    24G  0 part

# mkfs.ext4 /dev/vdb1
mke2fs 1.46.5 (30-Dec-2021)
...
Writing superblocks and filesystem accounting information: done

    • Mount the volume

      # mkdir /data

# mount /dev/vdb1 /data

# lsblk
NAME    MAJ:MIN  RM   SIZE RO TYPE MOUNTPOINT
vda       252:0   0    24G  0 disk
├─vda1    252:1   0  23.9G  0 part [SWAP]
└─vda14   252:14  0     4M  0 part /
└─vda15   252:15  0   106M  0 part /boot/efi
vdb       252:16  0    24G  0 disk
└─vdb1    252:17  0    24G  0 part /data

# vi /etc/fstab
(add) /dev/vdb1     /data       ext4     defaults   0 0
ItemDescription
cat /etc/fstabLinux system file containing filesystem information. Used when the server starts.
df -hConfirms the total disk usage of the mounted filesystems in the Linux system.
fdisk -lConfirms partition information.
  • Physical disks are displayed with letters such as a, b, c, etc. (e.g., /dev/sda, /dev/sdb, /dev/sdc)
  • Disk partitions are displayed with numbers such as 1, 2, 3, etc. (e.g., /dev/sda1, /dev/sda2, /dev/sda3)
Table. Mount Command Reference
CommandDescription
mDisplays the usage of the fdisk command.
nCreates a new partition.
pDisplays the changed partition information.
tChanges the system ID of the partition.
wSaves the partition information and exits the fdisk settings.
Table. Partition Creation Command (fdisk) Reference

Windows Operating System

  1. Click the All Services > Storage > Block Storage(BM) menu. The Block Storage(BM) Service Home page will be displayed.

  2. On the Service Home page, click the Block Storage(BM) menu. The Block Storage(BM) list page will be displayed.

  3. On the Block Storage(BM) list page, click the resource you want to connect to the server. The Block Storage(BM) details page will be displayed.

  4. In the Connected Server section, check the server and access it. Follow the guide below to connect (Disk Online) the volume.

    • Right-click the Windows Start icon and run Computer Management.

    • In the Computer Management tree structure, select Storage > Disk Management.

    • Confirm the disk

    Mount
    • Set the disk to Online
    Mount
    • Initialize the disk
    Mount
    Mount
    • Format the partition
    Mount
    Mount
    Mount
    • Confirm the volume
    Mount

Disconnecting from the Server (Umount, Disk Offline)

After disconnecting from the server (Umount, Disk Offline) and performing the disconnection work, you must disconnect the connected server from the Console. Follow the procedure below.

Caution
If you disconnect the connected server from the Console without disconnecting from the server (Umount, Disk Offline), a server status error (Hang) may occur. Be sure to perform the OS task first.

Linux Operating System

  1. Click All Services > Storage > Block Storage (BM) menu. Move to the Service Home page of Block Storage (BM).

  2. Click the Block Storage (BM) menu on the Service Home page. Move to the Block Storage (BM) list page.

  3. Click the resource to be disconnected from the server on the Block Storage (BM) list page. Move to the Block Storage (BM) details page.

  4. Check the server in the Connected Server item and access it. Follow the guide below to disconnect the volume (Umount).

    • Volume Umount
      # umount /dev/vdb1 /data

# lsblk
NAME    MAJ:MIN  RM   SIZE RO TYPE MOUNTPOINT
vda       252:0   0    24G  0 disk
├─vda1    252:1   0  23.9G  0 part [SWAP]
└─vda14   252:14  0     4M  0 part /
└─vda15   252:15  0   106M  0 part /boot/efi
vdb       252:16  0    24G  0 disk
└─vdb1    252:17  0    24G  0 part

# vi /etc/fstab
(delete) /dev/vdb1     /data       ext4     defaults   0 0

Windows Operating System

  1. Click All Services > Storage > Block Storage (BM) menu. Move to the Service Home page of Block Storage (BM).

  2. Click the Block Storage (BM) menu on the Service Home page. Move to the Block Storage (BM) list page.

  3. Click the resource to be disconnected from the server on the Block Storage (BM) list page. Move to the Block Storage (BM) details page.

  4. Check the server in the Connected Server item and access it. Follow the guide below to disconnect the volume (Disk Offline).

    • Right-click the Windows Start icon and run Computer Management

    • Select Storage > Disk Management in the Computer Management tree structure

    • Right-click the disk to be removed and run Offline

    Umount
    • Check the disk status
    Umount
How-to Guides
Using Snapshots