Chapter 2. Architecture and technical overview 59
Draft Document for Review May 28, 2009 1:59 pm 4405ch02 Architecture and technical overview.fm
Micro-Partitioning technology. System Storage and the IBM Power servers are usually
connected together to a storage area network.
For further information about ESS, refer to the following Web site:
http://www.ibm.com/servers/storage/disk/enterprise/ds_family.html
2.12 Hardware Management Console
The Hardware Management Console (HMC) is a dedicated workstation that provides a
graphical user interface for configuring, operating, and performing basic system tasks for the
POWER6 processor-based (as well as the POWER5 and POWER5+ processor-based)
systems that function in either non-partitioned, partitioned, or clustered environments. In
addition the HMC is used to configure and manage partitions. One HMC is capable of
controlling multiple POWER5, POWER5+, and POWER6 processor-based systems.
At the time of writing, one HMC supports up to 48 POWER5, POWER5+ and POWER6
processor-based systems and up to 254 LPARs using the HMC machine code Version 7.3.
For updates of the machine code and HMC functions and hardware prerequisites, refer to the
following Web site:
https://www14.software.ibm.com/webapp/set2/sas/f/hmc/home.html
POWER5, POWER5+ and POWER6 processor-based system HMCs require Ethernet
connectivity between the HMC and the server’s service processor, moreover if dynamic LPAR
operations are required, all AIX 5L, AIX V6, and Linux partitions must be enabled to
communicate over the network to the HMC. Ensure that at least two Ethernet ports are
available to enable public and private networks:
The HMC 7042 Model C06 is a deskside model with one integrated 10/100/1000 Mbps
Ethernet port, and two additional PCI slots.
The HMC 7042 Model CR4 is a 1U, 19-inch rack-mountable drawer that has two native
10/100/1000 Mbps Ethernet ports and two additional PCI slots.
For any logical partition in a server, it is possible to use a Shared Ethernet Adapter set in
Virtual I/O Server or Logical Ports of the Integrated Virtual Ethernet card, for a unique or
fewer connections from the HMC to partitions. Therefore, a partition does not require it’s own
physical adapter to communicate to an HMC.
It is a good practice to connect the HMC to the first HMC port on the server, which is labeled
as HMC Port 1, although other network configurations are possible. You can attach a second
HMC to HMC Port 2 of the server for redundancy (or vice versa). Figure 2-23 on page 60
shows a simple network configuration to enable the connection from HMC to server and to
enable Dynamic LPAR operations. For more details about HMC and the possible network
connections, refer to the Hardware Management Console V7 Handbook, SG24-7491.
Note: The IBM 2-Port 10/100/1000 Base-TX Ethernet PCI-X Adapter (FC 5706) should be
ordered to provide additional physical Ethernet connections.
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