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Expanding a Storage Pool by Replacing Disks in a RAID Group

You can increase the maximum storage capacity of a storage pool by expanding a RAID group in the pool. To expand the RAID group you replace one of the group's member disks with a higher-capacity disk, wait for the RAID group to rebuild, then repeat until all of its disks have been replaced. This operation can be performed while the storage pool is online and accessible to users.

  1. Go to Storage & Snapshots > Storage > Storage/Snapshots.
  2. Select a storage pool.
  3. Click Manage.

    The Storage Pool Management window opens.

  4. Select a RAID group.

    The RAID group can be of any type except for RAID 0.

  5. Ensure there are no global spare disks assigned to the RAID group's enclosure.

    You can view and disable global enclosure spare disks at Storage & Snapshots > Storage > Disks/VJBOD.

  6. Prepare a number of higher-capacity disks.

    You must prepare one higher-capacity disk for each disk in the RAID group.

  7. Click Manage, and then select Replace Disks One by One.

    The Replace Disks One by One window opens.

  8. Select a disk to replace.
  9. Click Change.

    The disk description changes to Please remove this drive.

  10. Remove the disk from the drive bay.
    • The NAS beeps twice.

    • The disk description changes to Please insert the new disk.

    • The status of the RAID group changes to Degraded.

    • The status of the RAID group's storage pool changes to Warning(Degraded).

  11. Insert a new higher-capacity disk into the same drive bay.

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

  12. Wait for the RAID group to finish rebuilding.

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

    The RAID group status changes back to Ready.

  13. Repeat the previous steps until all disks in the RAID group have been replaced with higher-capacity disks.

The additional capacity from the new disks is added to the storage pool after the RAID group finishes rebuilding for the final disk.