TrueNAS CORETrueNAS CORE Nightly Development Documentation
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Creating Scrub Tasks

A “scrub” is when ZFS scans the data on a pool. Scrubs identify data integrity problems, detect silent data corruptions caused by transient hardware issues, and provide early disk failure alerts.

Edit Default Scrub Tasks

By default, TrueNAS creates a scrub task when you create a new pool. The default schedule for a scrub is to run every Sunday at 12:00 AM. To edit the default scrub, go to Tasks > Scrub Tasks, click , and EDIT.

Create New Scrub Tasks

To create a scrub task for a pool, go to Tasks > Scrub Tasks and click ADD.


Select a Pool, enter the Threshold (in days), and give the scrub a description. Assign a Schedule and click SUBMIT.