Introduction

Volume management is the process of creating logical units of storage from physical disk storage. Because these logical storage units are not bound by the same constraints as physical disk, the system administrator can use volumes to improve performance and/or reliability. For example, a single volume may be used to mirror the data on two physical disks. If one of those physical disks were to fail, the volume management software would allow uninterrupted access to the data via the remaining disk in the mirror.