An example of the increased reliability that a RAID 1 set of mirrored disks can provide can be illustrated with a simple two-disk set of identical drives. Assume the failure rate for any one drive is 10 percent over its expected lifetime. The possibility of both drives in the set failing at the same time would be (10 percent) raised to the power of two (the number of disks in the set). The resulting effective reliability becomes a one percent chance of failure over the expected lifetime. Add a third disk to the RAID 1 mirrored set and the resulting chance of failure drops to.1 percent.

SoftRAID allows the user to create and manage RAID 4 and 5 volumes, RAID 1+0, and RAID 1 (Mirror) and RAID 0 (Stripe) volumes. SoftRAID also provides 'predictive disk failure', where users are alerted to potential disk failures even before they fail.

In short, F-Secure’s user-friendly UI and accurate protection make it an adequate choice, but it is lacking in the feature department. The debate is the same regardless of whether you have a Mac or a PC. Free antivirus products are effective at protecting against threats but they lack certain premium features. Do I need free or paid-for antivirus for Mac?