Managing Scrub Tasks
4 minute read.
Last Modified 2023-11-30 10:15 ESTWhen TrueNAS performs a scrub, 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.
TrueNAS generates a default scrub task when you create a new pool and sets it to run every Sunday at 12:00 AM.
To schedule a new resilver task to run at a higher priority, select the hour and minutes from the Begin dropdown list.
To schedule a new resilver task to run at a lower priority to other processes, select the hour and minutes from the End dropdown list. Running at a lower priority is a slower process and takes longer to complete. Schedule this for times when your server is at its lowest demand level.
TrueNAS needs at least one data pool to create scrub task.
To create a scrub task for a pool, go to Data Protection and click ADD in the Scrub Tasks window.
Select a preset schedule from the dropdown list or click Custom to create a new schedule for when to run a scrub task. Custom opens the Advanced Scheduler window.
To view the progress of a scrub task, check the status under the Next Run column.
To edit a scrub, go to Data Protection and click the scrub task you want to edit.