Appendix B. Hardware Management Console and Support Element 253
B.2 Support Elements
The HMC is used to control and monitor the z900 server via the Support Elements. The SEs
are used to manipulate the z900 server, store configuration information, load Licensed
Internal Code, and to monitor and control the operating state of the z900 server hardware.
A z900 server can be controlled by up to 32 different HMCs.
Two ThinkPad SEs are mounted in the front of frame A. One ThinkPad acts as the primary
(active) SE and the other acts as an alternate (spare).
The primary SE (see “Primary support element” on page 253) is used for all interactions with
the z900 ...
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