IBM eServer Certification Study Guide - pSeries AIX System Administration

6.5. Managing logical volumes

Physical volumes and volume groups are normally not addressed directly by users and applications to access data, and they cannot be manipulated to provide disk space for use by users and applications. However, logical volumes provide the mechanism to make disk space available for use, giving users and applications the ability to access data stored on them.

When you create a logical volume, you specify the number of logical partitions for the logical volume. A logical partition maps to one, two, or three physical partitions, depending on the number of copies of your data you want to maintain. For example, you can specify a logical volume to be mirrored and have more than one copy as shown in Figure 6-13. One copy ...