This article covers ReadyNAS OS6 Snapshot Management, and Snapshot Retention Times.

ReadyNAS OS6 allows snapshots of shares or LUNs to be automatically taken at hourly, daily or weekly intervals.

• Hourly snapshots will be taken on the hour, every hour.
• Daily snapshots will be taken daily at midnight.
• Weekly snapshots will be taken on Friday at midnight.

Note that these times are not currently changeable.

In order to maintain a sufficient amount of free capacity, the ReadyNAS uses Smart Snapshot Management to prune older snapshots.

Snapshots are pruned based on the following retention times:

• Hourly snapshots will be kept for a period of 48 hours.
• Daily snapshots will be kept for a period of 4 weeks.
• Weekly snapshots will be kept for a period of 8 weeks.
• Monthly snapshots are retained forever.

Note 1: If volume usage exceeds 95% of total capacity, then the oldest snapshots will be automatically pruned to bring the volume usage below this 95% threshold.

Note 2: Smart Snapshot Management applies only to automatic snapshots. Snapshots taken manually, will not be pruned.