HP Storage Essentials V5.1 User Guide Second Edition (Linux Release) (T4283-96056, November 2006)

Storage Essentials 5.1 User Guide 181
IMPORTANT: The management server updates the Current Usage Summary table every 24 hours
after the first update. Elements the management server has discovered before the update are not
reflected in the Current Usage Summary table. The time for the update is determined when the
management server was first started. For example, the first update of the Current Usage Summary
table occurs six hours after the management server was first started. The following updates occur
every 24 hours. If the management server was started for the first time at noon, the first update of
the Current Usage Summary table would occur at 6 p.m. All following updates would always occur
at 6 p.m.
MAPs are determined as described in the following table.
Example 1:
Assume you have the following environment:
• Brocade (two switches of 12 ports each, one switch of 16 ports) - Total 40 ports
• McDATA (one switch of 64 ports) - Total 64 ports
• Windows 2000 and Solaris Hosts (10 hosts with two Fibre Channel connection each) - Total 20
ports
• EMC Subsystem (one subsystem with 16 Fibre Channel ports) - Total 16 ports
The software calculates 140 MAPs in this environment.
Example 2:
Assume you have the same configuration above, and you added several devices to your network
that the management server does not support. There are still 140 MAPs in this environment since the
management server does not count the ports from devices it does not support.
Example 3:
Table 18 Determining Managed Access Points
Element Managed Access Point
Hosts The managed access points (MAPs) are the number of Fibre Channel
ports with a minimum of one MAP. If a host has no Fibre Channel
ports, the software assumes one MAP. The software does count direct
attached storage, provided it is supported by the management server.
Switches All ports on a switch are counted as MAPs.
Storage systems The sum of all front facing ports. Storage systems with FA ports the
software does not support, such as mainframe attached FICON, are
still counted as MAPs. However, the management server does not
count MAPs from storage systems it does not support. See the release
notes for information about supported storage systems.