| 1 | ### Understand the alert |
| 2 | |
| 3 | This alert is triggered when the state of a ZFS pool changes to a warning state, indicating potential issues with the pool, such as disk errors, corruption, or degraded performance. |
| 4 | |
| 5 | ### Troubleshoot the alert |
| 6 | |
| 7 | 1. **Check pool status**: Use the `zpool status` command to check the status of the ZFS pool and identify any issues or errors. |
| 8 | |
| 9 | 2. **Review disk health**: Inspect the health of the disks in the ZFS pool using `smartctl` or other disk health monitoring tools. |
| 10 | |
| 11 | 3. **Replace faulty disks**: If a disk in the ZFS pool is faulty, replace it with a new one and perform a resilvering operation using `zpool replace`. |
| 12 | |
| 13 | 4. **Scrub the pool**: Run a manual scrub operation on the ZFS pool with `zpool scrub` to verify data integrity and repair any detected issues. |
| 14 | |
| 15 | 5. **Monitor pool health**: Keep an eye on the ZFS pool's health and performance metrics to ensure that issues are resolved and do not recur. |
| 16 | |
| 17 | ### Useful resources |
| 18 | |
| 19 | 1. [ZFS on Linux Documentation](https://openzfs.github.io/openzfs-docs/) |
| 20 | 2. [FreeBSD Handbook - ZFS](https://www.freebsd.org/doc/handbook/zfs.html) |