netdata/health/guides/zfs/zfs_pool_state_warn.md

Understand the alert

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.

Troubleshoot the alert

1. Check pool status: Use the zpool status command to check the status of the ZFS pool and identify any issues or errors.

2. Review disk health: Inspect the health of the disks in the ZFS pool using smartctl or other disk health monitoring tools.

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.

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.

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.

Useful resources

1. ZFS on Linux Documentation
2. FreeBSD Handbook - ZFS