Reset Synology drive with critical status

reset-synology-disk.txt

Synology flag one of the drive to be critical
After running extended SMART test, all is good and no bad sector.

So you would like to reset the status and add back the disk.

** Find out your drive model and serial number

1. Storage Manager → HDD/SSD → Select critical disk → Deactivate Drive
2. unlplug your drive from Synology
3. Control Panel -> Terminal & SNMP -> Enable SSH service
4. Login to your synology IP with ssh
5. remove any records that uses that serial number (eg my serial number starts with 214AK)
```
sudo sqlite3 /var/run/disk_latency_tmp.db
SELECT * FROM latency WHERE serial LIKE '214AK%';
DELETE FROM latency WHERE serial LIKE '214AK%';

sudo sqlite3 /var/log/synolog/.SYNODISKDB
SELECT * FROM logs WHERE serial LIKE '214AK%';
DELETE FROM logs WHERE serial LIKE '214AK%';


sudo sqlite3 /var/log/synolog/.SYNODISKHEALTHDB
SELECT * FROM disk_error WHERE serial LIKE '214AK%';
DELETE FROM disk_error WHERE serial LIKE '214AK%';
SELECT * FROM prediction WHERE serial LIKE '214AK%';

sudo sqlite3 /var/log/synolog/.SYNODISKTESTDB
SELECT * FROM logs WHERE serial LIKE '214AK%';
DELETE FROM logs WHERE serial LIKE '214AK%';

sudo sqlite3 /var/log/disk-latency/.SYNODISKLATENCYDB
SELECT * FROM latency WHERE serial LIKE '214AK%';
DELETE FROM latency WHERE serial LIKE '214AK%';
```
6. sudo vim /var/lib/drive/disk_overview.xml -> remove the record that contains your drive serial number
7. reboot Synology 
8. Select the Storage Pool the disk was previously part of
9. Repair → Select disk
10. Wait for the RAID to be rebuilt



reference: 
https://www.synoforum.com/threads/reset-drive-critical-state.8787/
https://community.synology.com/enu/forum/1/post/151784
https://www.synoforum.com/threads/storage-manager-rejects-new-healthy-disks-as-critical-because-of-reset-commands.8153/
https://www.reddit.com/r/Xpenology/comments/17m53fq/reset_drive_state_critical/
https://xpenology.com/forum/topic/65154-drive-warning/