Getting started with a HA-NAS solution

Find out how to manage a HA-NAS via the OVHcloud Control Panel

Last updated 16th September 2021


Network Attached Storage (NAS) is a file server connected to a network whose main function is the storing of data in a centralised volume for heterogeneous network clients.



You can manage your HA-NAS via the OVHcloud Control Panel.

Once you have logged in, click on Bare Metal Cloud, then NAS and CDN in the menu on the left. Click on your service to access the administration menu.

NAS access

Creating a partition

To add a new partition, click Create a partition.

create a partition

Simply enter your partition name, partition size, and authorised protocol (NFS or CIFS).

partition attributes

Modifying the size of a partition

To change the size of a partition, click on the ... button to the right of the partition concerned, then Modify size.

change the size of a partition

Enter the new size, then confirm.

Change the frequency of snapshots

By default, a snapshot of your NAS content takes place every hour, and is saved on your NAS.

However, you can create up to 3 additional snapshots at different frequencies if you wish, which will also be saved on your NAS.

To do this, click the ... button to the right of the partition concerned, then click Frequency of snapshots.

change snapshot frequency

Select the new frequency, then confirm.

Creating an instant snapshot

Apart from the snapshots taken automatically, you can create an instant snapshot of a partition at any time by clicking on the ... button to the right of the partition, then on Custom snapshot.


Name the snapshot and click Add.

Adding an access

In order to access the partition you created earlier, you will need to configure access.

Only OVHcloud service IP addresses can access your NAS (e.g. a dedicated server, a VPS, a Public Cloud instance, etc.).

To authorise an IP to access the NAS, click on the ... button to the right of the existing partition, then on Manage access.

manage access

Then click Add an access, and select the IP address of your OVHcloud product.
You must also define whether the authorised access for this IP address is read-only or read/write.

add access

Deleting an access

To remove access to a partition, click on the ... button to the right of the IP address concerned, then Delete.


ZFS settings

All the default Z File System settings are optimised. Though we do not recommend changing those settings, this menu does allow you to adjust the ZFS that the HA-NAS is using.

To change the ZFS settings of a partition, click on the ... button to the right of the partition concerned, then Z File System (ZFS) settings.


  • Disabling access time update (atime): Disabling atime means the kernel will no longer update the file system timestamp each time a file is accessed. This can be useful to speed up frequent read operations, for example on static web pages. However, it should not be enabled for consistency-critical applications such as databases.
  • ZFS recordsize: This property changes the maximum block size on the ZFS filesystem. Please note that ZFS will still use a smaller block size if the file is smaller than the maximum. For example, a 16 KB file will use a 16 KB block (plus metadata) to not waste storage space. We generally advise against changing ZFS recordsize for this reason.
  • Sync: This changes the behaviour of ZFS filesystem transactions with regard to RAM data buffering and writing data to disk. We do not recommend changing this property without an appropriate reason.

Deleting a partition

Deleting a partition deletes all of the data stored on it permanently.

To delete a partition, click on the ... button to the right of the existing partition, then Delete.

delete a partition

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