PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System)

A.2.25 Operation in Cluster System

Understand and pay attention to the following points when changing the configuration in a cluster system.

• Before registering disks with a class, perform automatic resource registration and register disk units with the PRIMECLUSTER resource database.
  

  
  For details on the automatic resource registration, see "PRIMECLUSTER Cluster Foundation (CF) Configuration and Administration Guide."

• Disks that have not been registered with the resource database yet cannot be registered with a shared class.

• Disks that have not been registered with the resource database yet can be registered with a root class or a local class.

• When expanding the scope of a local class to which disks not registered with the resource database belong into a shared class, perform automatic resource registration in advance, and register all disks that belong to the local class with the resource database.

• For disks to be registered with a shadow class, disk resource creation is not required.

• Do not register certain disks with the resource database in multiple cluster domains.
  Before executing automatic resource registration, describe those disks in the Excluded Device List.

• After automatic resource registration, to register MPHD disks or MPLB disks with a class from GDS Management View, execute [Update Physical Disk Information] in the [Operation] menu before executing the registration.

• To perform object operations in a cluster system, enable cluster control. If cluster control is "off", it is impossible to perform shared object operations. Additionally, root and local object operations may cause errors or inconsistency.

• If physical disks that are registered with the resource database were swapped, after physical disk restoration (or the sdxswap-0 command) is completed, perform automatic resource registration regardless of the class types.
  This is required for changing VTOC volume names of original disks to those of replacing disks that are registered with the PRIMECLUSTER resource database. If automatic resource registration is not performed, a message indicating a disk unit connection error may be output or failover may occur when nodes are started.