Storage > NAS > Console User Guide

Create Storage

New storage is created. The created storage can be accessed from instances by using the network file system (NFS) protocol.

Item Description
Name Name of the storage to be created. The NFS access path can be created with the storage name. Storage name is limited to less than 100 alphabetic characters, numbers, and some symbols ('-', '_').
Description A description for storage
Size Size of the storage to be created. It can be entered from a minimum of 300 GB to a maximum of 10,000 GB.
Protocol Select a protocol to access the storage. CIFS and NFS are supported, but not simultaneously.
VPC The virtual private cloud (VPC) to access the storage.
Subnet The subnet to access the storage. Only subnets in the selected VPC can be chosen.
Access Control List (ACL) A list of the IPs or CIDR blocks that allow read and write permissions.
Auto Create Snapshot Snapshots are created automatically at a specified time once per day. When the maximum number of saves is reached, the first automatically created snapshot is deleted.
Snapshot Storage If the sum of the snapshot capacity exceeds the set size, the first created snapshot among all snapshots is deleted.
Encryption Select whether to enable storage encryption. This must be preceded by setting up encryption key store.

[Note] The number of subnets available for each project is limited to 3 as of Februrary 2024. To increase the limit, contact the Customer Center.

Manage CIFS Credentials

To use the CIFS protocol, you must create CIFS credentials. Credentials are managed on a per-project basis, and you must register a CIFS credential to access each CIFS storage.

Encryption Key Store Settings

NAS encrypted storage stores symmetric keys used for encryption in a key store in the NHN Cloud Secure Key Manager service. Therefore, to create encrypted storage, you must create a key store in the Secure Key Manager service in advance. Check the ID of the key store and enter it in the encryption key store settings.

When you create encrypted storage, the symmetric key is stored in the key store you set up. The symmetric key stored in the key store by the NAS service cannot be deleted while using encrypted storage. If you delete encrypted storage, the symmetric key is also deleted.

When you change the key store ID, the symmetric key for encrypted storage you create in the future is stored in the changed key store. Symmetric keys stored in the existing key store are retained.

[Note] You will be charged for key store usage according to the Secure Key Manager service pricing policy. For more information, see Secure Key Manager pricing.

NAS encrypted storage encrypts data with the XTS-AES-256 algorithm using two different symmetric keys. Therefore, two symmetric keys are stored in the key store for each encrypted storage.

Change Storage Size

NAS storage size is changed. Storage can be scaled up and down even while in use.

Change Access Control List Settings

The settings for the storage’s access control list is changed.

Change Snapshot Settings

The settings for Auto Create Snapshot and Snapshot Storage are changed.

Delete Storage

NAS storage is deleted.

[Caution] It is recommended to unmount the storage from the associated instance before deleting. Deleting the storage while it is mounted may cause problems on the user's system.

When deleting the storage, all data including snapshots are deleted. Deleted data cannot be recovered.

Create Snapshots

Snapshots of NAS storage are created immediately.

Restore Snapshots

Restores storage to the point in time when the snapshot was created.

[Caution] When restoring, snapshots created after the point of restoration are automatically deleted.

View Snapshot Restore Results

View the history of restoring storage.

Delete Snapshots

A specified snapshot is deleted. Once deleted, snapshots cannot be recovered.


Check various metrics of NAS storage with graphs. After selecting the storage to check, click the Monitoring tab.

The default search period is the latest 1 hour, and you can search any period you want through the search period filter. Descriptions of monitoring metrics are found in the table below.

Metric Unit Description
Storage capacity byte Display the total capacity of storage and the capacity in use.
Storage usage % Display the capacity in use as a percentage of the total storage capacity.
IOPS OPS Display storage operations per second.
Latency usec Display storage latency time.
Snapshot number - Display the number of snapshots in storage.
Snapshot capacity byte Display the amount of capacity that storage is using for the snapshot.
Inode - Display the number of storage inodes.
Storage status - Display storage status.
Number of client connections - Display the number of clients connected to storage.


View information about replication settings.

Setting Description
Replication Settings Displays whether replication is enabled for the storage.
Replication setup status Displays the status of replication settings between source and target storage.
Active: Active status
Retrieve failed: Temporary failure to obtain information
Halt: Paused state
Results of recent replication Displays the results of the last replication you ran.
Latest replication execution time Displays the last time you ran a replication.
Last replication success time Displays the last time replication completed.
Replication direction Displays the replication direction.
Target region Displays the replication target region. Only exposed if this is the source storage that you set up replication for.
Target storage Displays the replication target storage name. Exposed only if it is the source storage for which replication is set up.
Source region Displays the replication source region. Only exposed if replication is enabled on the target storage.
Source storage Displays the replication source storage name. Only exposed if replication is enabled on the target storage.

Replication Settings

Set up storage replication. When you set up replication, a target storage is created in the selected region that is the same size as the source storage. The target storage is created in a read-only state, and you must stop replication or turn off replication to change the state of the target storage. When you update or delete data in the source storage, the data in the target storage is also updated or deleted.

[Caution] To change the size of a replicated storage, you must change both the source storage and the target storage. If the size of the source storage and the target storage are different, replication might fail.

[Note] The target storage created by the replication setup is billed for storage capacity according to the NAS service fee policy.

You are charged for network traffic generated by replication between different regions.

For more information on pricing, see our NAS pricing guide.

Start Replication

Resumes replication of storage that is in a stopped state. Replication runs asynchronously when changes occur on the source storage. Before replication runs, the data on the source and target storage might not match.

[Caution] Replication might fail if the target storage size is smaller than the source storage size.

When replication runs, all existing data on the target storage is deleted and replaced with the same geometry as the source storage.

Stop Replication

Stops replicating storage. When you stop replication, the target storage becomes writable and can be mounted and used.

[Caution] If you stop replication, the data on the source and target storage might not match.

[Note] Storage in the Stop replication state might also experience a small amount of traffic to check replication status.

Change Replication Direction

Change the direction of replication between source and target storage.

  • Change replication direction from **[source->target to **[target->source)

    • All existing data on the source storage is deleted, and the data on the target storage is replicated to the source storage.
    • Replication might fail if the source storage size is smaller than the target storage size.
  • Change replication direction from **[target->source] to **[source->target] (revert)

    • All existing data on the target storage is deleted, and the data from the source storage is replicated to the target storage.
    • Replication might fail if the target storage size is smaller than the source storage size.

Disable Replication Settings

Disables storage replication. When you disable replication, the target storage retains the source storage data as it was when the last replication completed.

[Caution] When you re-establish replication, a new target storage is created. You cannot use the previously used target storage as the replication target storage again.

Connect Storage

Storage can be mounted on instances by using the connection information of the created storage. However, the instance on which storage is mounted must be connected to the specified subnet.


Install NFS Package
  • Debian, Ubuntu: nfs-common, rpcbind sudo apt-get install nfs-common rpcbind
  • CentOS: nfs-utils, rpcbind sudo yum install nfs-utils rpcbind
Run rpcbind Service
sudo service rpcbind start
Mount NAS Storage
sudo mount -t nfs {nas source} {mount point}
  • nas source: NAS storage information Example:
  • mount point: Directory on which NAS storage is mounted Example: /mnt


In File Explorer, right-click My PC in the left navigation pane and Connect Network Drive. In the Connect Network Drive window, select the drive you want to mount and enter the folder path. The folder path is formatted as \\{storage IP}\{storage name}, for example: \\\cifs