Create storage from Snapshot

Available in VPC

You can create storages by using snapshots to recover saved data.
First create storage in the console, and then access the server to mount storage. For detailed instructions for each OS, see the following guides:

• 1. Create storage from console
• 2. Set server (Linux/Windows)

1. Create storage from console

First, use a snapshot to create storage from the console.
The following describes how to create the storage using a snapshot.

1. Click the environment you are using in the Region menu and Platform menu of NAVER Cloud Platform console.
2. Click the Services > Compute > Server menus, in that order.
3. Click the Snapshot menu.
4. On the snapshot list, select the snapshot you want to create storage with, and then click the [Create storage] button.
5. From the Create storage pop-up window, set the information of the storage to be created, and then click the [Create] button.
   • Snapshot information: displays selected snapshot's information
   • Storage name: it must start with an English letter. Enter between 3-30 characters using uppercase and lowercase English letters, numbers, hyphens (-), and underscores (_)
     • If you don't enter anything, the storage name is automatically created.
   • Zone: select the zone to place the storage
   • Storage type: select the type you want according to the purpose of use
     • KVM-base storage: select CB1 for small data accessed frequently or FB1 for storing large data accessed infrequently
     • XEN-base storage: select SSD for high I/O performance or HDD for general services
   • Select server (XEN only): select the server to which you want to connect the storage
   • Size: enter the storage size within the displayed range for KVM-based snapshots
     • You can't change the storage size for XEN-based snapshots.
   • Max IOPS and Apply encryption to storage values are automatically applied, and you can't change the values
   • Storage termination protection (KVM only): select whether to protect storage from being terminated
6. After checking the set information, click the [OK] button.
   • Storage is created. You can check the created storage from the Storage menu.

2. Set server (Linux)

To add storage created from a snapshot to a Linux server, see the following guides:

1. Check storage identifier and file system type
2. Change storage identifier
3. Mount storage

1. Check storage identifier and file system type

Check storage identifier and file system type.

1. Access the Linux server to which storage is connected.
   • For more information on how to connect to the server, see Access Linux server.
2. Check the storage identifier and file system type created by snapshot through the blkid command.
   • The storage identifier is displayed as the UUID value.
   • The file system type is displayed as the TYPE value.
3. According to the result of the previous step, proceed with the following steps:
   • If you have duplicated storage identifiers, proceed with 2. Change storage identifier and 3. Mount storage.
   • If the identifiers of each storage are all different, proceed with 3. Mount storage.

2. Change storage identifier

In the following case, if the identifier of the storage in the original server is the same as the identifier of the created storage, the storage cannot be mounted.

• Creating a snapshot in one of the existing storages of the server to which storages were added
• Creating a snapshot from the basic boot storage of another server

If applicable, you need to first change the identifier of the created storage.
Proceed with the operation according to the file system type checked in 1. Check storage identifier and file system type.

• xfs file system type
• ext4 file system type

xfs file system type

The following describes how to change the identifier of a storage using the xfs file system. The description is based on the xvdb1 storage.

1. Enter the xfs_repair -L /dev/xvdb1 command.
   • The storage identifier of xvdb1 is deleted.
2. Enter the xfs_admin -U generate /dev/xvdb1 command.
   • A new identifier is created for the xvdb1 storage.
3. Check if it is changed into a new identifier by the blkid command.

ext4 file system type

The following describes how to change the identifier of a storage using the ext4 file system. The description is based on the xvdb1 storage.

1. Enter the tune2fs -U "UUID" /dev/xvdb1 or tune2fs -U random /dev/xvdb1 command.
2. Enter the desired storage identifier into the "UUID" location and run it.
   • You can create a new UUID by entering the uuidgen command.
3. The random option sets UUID to a random value of random.
4. Check if it is changed into a new identifier by the blkid command.
   If UUID is changed by the tune2fs command after creating and allocating snapshots and storage for default boot storage with the ext4 file system type while the server is running, the following error may occur:
   • For the booting disk, create the snapshot when the server is stopped to prevent data loss issues.

# tune2fs /dev/xvdb1 -U random
This operation requires a freshly checked filesystem.
Please run e2fsck -f on the filesystem.

Perform the following procedures in the relevant cases.

1. Check storage device status

# file -s /dev/xvdb1

Check if the phrase "needs journal recovery" is output in the command execution result value.
If the phrase is output, it means that the file system is damaged. Conduct the file system inspection and recovery with the following commands:

2. Conduct the file system inspection and recovery

# e2fsck -f /dev/xvdb1 -y

3. Conduct the storage identifier change task

# tune2fs /dev/xvdb1 -U random

3. Mount storage

See Mount storage to mount the created storage.

2. Set server (Windows)

To add the storage created by the snapshot to the Windows server, set the storage status to online.
The following describes how to set the storage status online on the Windows server.

1. Access the Windows server to which storage is connected.
   • For more information on how to connect to the server, see Access Windows server.
2. Click and then click the Windows Administrative Tools > Computer Management > Disk Management menus, in that order.
   • Alternatively, you can enter diskmgmt.msc on the Run command window.
3. Find the disk marked with Offline from the disk list, right-click the button, and then click Online.
   • You can now use the storage.