Expanding a RAID Group by Replacing all Disks

You can increase the maximum storage capacity of a RAID group by replacing all member disks with higher-capacity disks. This can be done online, without losing access to data or any interruption to NAS services.

  1. Go to Main Menu > Storage & Snapshots > Storage/Snapshot.
  2. Verify that all hot spares and global hot spares assigned to this RAID group are disabled.
  3. Select a storage pool or single static volume.
  4. Click Manage.
  5. Select a RAID 1, RAID 5, RAID 6, or RAID 10 group.
  6. Select Manage > Replace Disks One by One.
  7. Select a disk to replace.

    Ensure that the capacity of the new disk is greater than the capacity of the disk that it is replacing.

  8. Click Change.

    The disk description changes to Please remove this drive.

  9. Remove the disk from the bay.

    The NAS beeps twice. Then the disk description changes to Please insert the new disk.

  10. Insert a new disk into the same bay.

    The NAS beeps twice. Then the status of the disk and RAID group change to Rebuilding.

  11. Wait for rebuilding to finish.

    Do not remove any disks while the RAID group is rebuilding.

    The disks status changes back to Good.

  12. Repeat the previous steps until all disks in the RAID group have been replaced.

    The Expand Capacity button is enabled after all disks have been replaced and rebuilding has completed.

  13. Click Expand Capacity.

    A confirmation message appears.

  14. Click OK.

    The NAS beeps and then the RAID group status changes to Synchronizing.


    Do not power off the NAS or remove any disks while hard drive synchronization is in progress.

The RAID group status changes to Ready.