Managing Shared Disks

Chapter 1. Overview of the Managing Shared Disk components of PSSP

This chapter highlights what is new in this release and then gives a basic overview of each of the components of PSSP that help you manage the sharing of information on your SP system's disks. Later chapters give more information about the components and how to use them to manage your virtual shared disks.

The PSSP components that help you create and manage virtual shared disks are:

• IBM Virtual Shared Disk, the subsystem that provides the function so you can create and manage virtual shared disks along with a device driver that operates between your applications that use the virtual shared disks and the AIX Logical Volume Manager (LVM). Using the concurrent virtual shared disk, which is included in this subsystem, you can make use of the concurrent disk access environment supplied by AIX.
• Hashed Shared Disk, the subsystem that works with the IBM Virtual Shared Disk subsystem, offering a data striping device driver for your virtual shared disks
• IBM Recoverable Virtual Shared Disk, the subsystem that provides recoverability of your virtual shared disks if a node, adapter, or disk failure occurs

Also in this chapter is an introduction to the IBM Virtual Shared Disk Perspective graphical user interface for managing virtual shared disks.