HP StoreAll Storage - Manual (Page 14)

The default retention period determines whether you can manage WORM (non-retained) files as
well as WORM-retained files. (WORM (non-retained) files can be deleted at any time;
WORM-retained files can be deleted only after the file's retention period has expired.)
To manage only WORM-retained files, set the default retention period to a non-zero value.
WORM-retained files then use this period by default; however, you can assign a different retention
period if desired.
To manage both WORM (non-retained) and WORM-retained files, uncheck Set Default Retention
Period. The default retention period is then set to 0 seconds. When you make a WORM file retained,
you will need to assign a retention period to the file.
Optionally, check Enable Data Validation to schedule periodic scans on the file system. Select Next
to accept the default schedule, or select Modify to open the Data Validation Scan Schedule dialog
box and configure your own schedule.
14 Creating and mounting file systems