There are various reasons why files on a hard disk may not be properly accessible. Here are some reasons and ways to identify and address each in OS X.

A look at the pros and cons of merging physical and logical security. Reasons not to merge physical systems (video surveillance, door-access controls, fire alarms, HVAC and lighting controls and ...

Condusiv says that by defragging disks at the logical disk layer, its new Diskeeper 15 Server adds performance beyond the standard disk defragging software.