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Configuration: About Your Host 93
Host Topology
Host topology is the organization of hosts, host groups, and host interfaces
configured for a storage array. You can view the host topology in the Mappings
tab of the AMW. For more information, see "Using the Mappings Tab" on
page 88.
The following tasks change the host topology:
• Moving a host or a host connection
• Renaming a host group, a host, or a host connection
• Adding a host connection
• Replacing a host connection
• Changing a host type
MDSM automatically detects these changes for any host running the host
agent software.
Starting or Stopping the Host Context Agent
The host context agent discovers the host topology. The host context agent
starts and stops with the host. The topology discovered by the host context
agent can be viewed by clicking Configure Host Access (Automatic) in the
Configure tab in the MDSM.
You must stop and restart the host context agent to see the changes to the
host topology if:
• A new storage array is attached to the host server.
• A host is added while turning on power to the RAID controller modules.
Linux
To start or stop the host context agent, enter the following command at
the prompt:
SMagent start
SMagent stop
You stop and then restart SMagent after:
• Moving a controller offline or replacing a controller.
• Removing host-to-array connections from or attaching host-to-array
connections to a Linux host server.
book.book Page 93 Wednesday, June 8, 2011 5:01 PM