Unix Tipz & Tricz

VxVM uses two types of objects to handle storage management: physical objects and virtual objects.

Physical objects - Physical disks or other hardware which interface with block and raw operating system device.

Ex. – Disk and Disk arrays.

Virtual objects - VxVM, creates virtual objects called volumes on physical disks. Volumes are logical entity which are accessed by file systems, databases, or other applications in the same way that physical disks are accessed. Volumes are also composed of other virtual objects (plexes and subdisks) that are used in changing the volume configuration.

Ex. Volumes, plexes, subdisks, Disk-groups.