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AIX HACMP

I was wondering how HACMP works for two nodes cluster? It uses any fencing methods for shared storage? Is it mandatory to have a quorum disk?

Thanks!
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Carlos Cabañas
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PowerHA is designed to keep resources highly available with minimum downtime by
gathering resources in ways that allow multiple IBM System p servers to access
them. PowerHA manages disk, network, and application resources logically, passing
control to individual machines based on availability and preference. From a systems
administration point of view, the main concept behind PowerHA is to keep everything
as redundant as possible to ensure that there is high availability at all levels. powerHA don't use quorum disks, it uses heartbeat disks.
Shared storage environments
HACMP is largely unconcerned about the disk storage that you select. Supported
technologies include Fibre Channel, Serial Storage Architecture (SSA) and SCSI and
Fibre Channel. Most IBM storage is supported with HACMP and although there is no
formal agreement, third-party storage such as EMC and Hitachi can be used, some
custom modifications may be required.
It is also important to note that data availability is not ensured by HACMP. This must be
done either through the redundancy features of a storage device or through AIX LVM
mirroring
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ASKER

Thank you. So fencing is used or not on HACMP?

@wmp: still waiting for you to get back from holiday :)
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Carlos Cabañas
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Thank you!