Hardware Management Console Best Practices
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2 Planning
Planning should be done for any major change in any computing environment,
including adding new servers, performing upgrades and implementing software
changes. Careful planning involves creating a timeline and dividing the project
into phases, each with a specific, stated outcome. In effective planning, you draw
up a list of assignments and responsibilities, as well as document the current
environment and the desired result.
As far as planning for the HMC is concerned, the customer needs to begin with
some fairly simple questions: is an HMC needed? What models are available?
Where are they set up? How do they connect to servers they manage? How are
they maintained and by whom, and where can I find documentation?
2.1 Do I Need an HMC?
Mid-range and larger p5 and i5 servers need an HMC to create and manage
logical partitions, dynamically reallocate resources, invoke Capacity on Demand,
utilize Service Focal Point and facilitate hardware control. High-end servers with
Bulk Power Controllers (BPC), such as the IBM System p5 model 590, p5-595
and p5-575 systems, require at least one HMC acting as a DHCP (Dynamic Host
Configuration Protocol) server. Two HMCs are recommended for enhanced
availability. Mission critical solutions, even those hosted on entry or mid-range
servers, may benefit from having dual HMCs.
HMCs may not be cost-effective for distributed, entry level systems that
nevertheless require the capabilities of Advanced POWER Virtualization. Entry
level servers without an HMC can be configured with a hosting partition called
the IBM Integrated Virtualization Manager (IVM). It provides a subset of HMC
functions and a single point of control for small system virtualization. IVM does
not offer the full range of management capabilities found on an HMC, but it may
be sufficient for a small server with one to eight processors. IVM is a component
of the Virtual I/O Server Version 1.2, which comes with purchase of the
Advanced POWER Virtualization hardware feature code.
2.2 HMC Models
POWER5 systems use the IBM 7310 Hardware Management Console, which
comes in rack-mounted and desktop configurations. The same HMC supports i5
and p5 servers. One HMC can support both i5 and p5 systems simultaneously.
The rack-mounted models currently are the 7310-CR2 and 7310-CR3. The desk
side units are 7310-C03 and 7310-C04.
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