Metadisk

A metadisk, as illustrated in Figure 1-5, is a construct that enables you to access a disk via either of two physical paths without having to reference either path explicitly within your scripts and programs. You reference a metadisk (in your scripts and programs) using an AP-specific device node such as /dev/ap/dsk/mc0t1d1s0. (See "Device Nodes for Metadisks" for more information.)

In Figure 1-5, an AP-specific device node is used to perform disk I/O, regardless of which pln port (pln2 or pln9) is currently handling I/O.

Figure 1-5 Metadisk Example