Repair M.2 RAID 1 in adaptor card

The following was tested on a DS1821+. May not work on older models.

Requires DSM 7.2 or later.

Note: The following requires your Synology NAS to have internal M.2 slots.

How I repaired my NVMe RAID 1 after replacing a failed NVMe drive.

First I simulated a crashed NVMe storage pool.

1. Shut down Synology.
2. Removed 1 NVMe drive that was being used in a RAID 1 storage pool in E10M20-T1.
3. Booted Synology.
4. Shut down Synology.
5. Reinserted the NVMe drive.
6. Booted Synology.

Steps I used to repair the NVMe RAID 1.

1. Shut down Synology.
2. Swapped NVMe drives' locations:
   • Moved NVMe drives from PCIe M.2 adaptor card to internal M.2 slots.
   • Moved NVMe drives from internal M.2 slots to PCIe M.2 adaptor card.
   • Made sure to install drive 1 from E10M20-T1 in internal slot 1.
   • Made sure to install drive 2 from E10M20-T1 in internal slot 2.
3. Booted Synology.
4. Deactivated crashed NVMe drive.
5. Rebooted.
6. Ran Synology_HDD_db.
7. Was able to click "repair now" on the M.2 storage pool and select the previously deactivated NVMe drive.
8. Success!