SubRosaSoft today announced the availability of DiskGuardian 2.1, the latest release of the company’s collection of tools that alert users of imminent hard drive failure in addition to performing Volume Repairs, Backup and Restore, Benchmarking, Surface Scanning for media defects, and verification of data integrity on storage subsystems. Version 2.1 includes a menu command to search for disks that were not mounted (even those that are not mountable), as well as the ability for the user to backup an unmounted drive. SubRosaSoft DiskGuardian requires Mac OS X 10.2 or higher and carries a manufacturer’s suggested retail price of US$69.95. Competitive upgrades are also available.