Cross-site mirroring (XSM)

 

This topic describes how to create a highly available environment by using cross-site mirroring.

• Independent disk pool terminology
  As you work with independent disk pools, the independent disk pool terminology is useful.

• Geographic mirroring
  Geographic mirroring is a function that keeps two identical copies of an independent disk pool at two sites to provide high availability and disaster recovery.

• External load source disk unit
  The load source disk unit is the disk unit that contains the initial programs and data that are used during an initial program load (IPL) of the system.

 

Parent topic:

Disk management