Expanding RAID Storage Size

Some UniFi Consoles, such as UniFi Network Video Recorders and UniFi Network-Attached Storage devices have multiple disk bays that can be used to create redundant storage for maximum data protection.

Here, we'll cover the simple process of increasing storage capacity, either by adding new disks or replacing existing ones.

Inserting Additional Disks

If you have empty slots, simply insert new disks of the same capacity of those already installed. Larger disks will not be fully utilized because redundant storage is based on the smallest capacity disk in the storage array.

For example, if you already have a few 2TB disks in your storage array and you add a new 8TB disk, only 2TB of the new disk will be used. Alternatively, if you added a 1TB disk, it would not be used at all.

Once inserted, UniFi will detect the new disk(s) and prompt to begin the synchronization process. Do not power down or remove any disks during this time.

If Disks Have Pre-Existing Data

Disks with pre-existing data will need to be reformatted for use with your current UniFi Console. Go to UniFi OS Settings > Storage, select the disk(s) and click Erase Format.

If you receive an error in the user interface, follow these steps:

  1. Turn off the UniFi Console.
  2. Remove the newly inserted disks.
  3. Turn it back on.
  4. Re-insert the new disks.
  5. Navigate to UniFi OS Settings > Storage, select the disk(s) and click Erase Format.

If instead you want to migrate data from an old UNAS to a new one, read about migrating here.

Replacing Disks

If all disk bays are already occupied, you can increase your storage capacity by exchanging the disks with larger ones. Note that all disks must be the same size. For example, if you want to upgrade from a 1TB to an 8TB, all disks must be replaced because redundant storage is based on the smallest capacity disk in the storage array.

Follow these steps to ensure a smooth transition:

  1. Replace one disk at a time. Remove the existing disk and insert a larger one into the vacant bay.
  2. Allow the system to complete synchronization and ensure that the new disk is functioning properly before proceeding to the next one.
  3. Repeat steps 1 & 2, exchanging each installed disk with a larger one and synchronizing until all disks have been replaced.
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