Galaxy Metal Gear 65 - Manual (Page 47)

RAID Management
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3.4.4 Controlling Partition Access
The Galaxy 65 Subsystem’s InfoShield capability lets you specify which hosts can access each partition.
This gives you complete control of array access based on your specific needs.
Figure 3–1 shows an example of how you can use InfoShield.
Figure 3–1 InfoShield example
Before you set up InfoShield, you should know the World Wide Name (WWN) for each host that you want
to set up. Your SAN administrator should know the WWNs for your network. You can display a list of the
last 64 WWNs that the Galaxy 65 Subsystem is aware of on the SAN, and you can give each WWN a
nickname of your own. This makes working with the InfoShield feature faster and easier.
You set up InfoShield by either excluding or including hosts on a list for each partition LUN. The list can
include or exclude up to 64 specific hosts or all hosts for each partition LUN.
For example, in Figure 3–1 , Array A has two partitions. Partition 1 has an include list that contains only
Accounting, so only the Accounting server can access partition 1. Array B, partition 3 has an exclude list
that contains only the Web server, so all hosts except the Web server can access the partition. Array C
uses the default setting, Include All Hosts, which permits all hosts to access the array.
3.4.4.1 Viewing Known WWNs
You can view the global host list, which includes the last 64 host WWNs that the Galaxy 65 Subsystem
is aware of on your SAN. The Galaxy 65 Subsystem will be aware of any host that was started since the
Galaxy 65 Subsystem was last restarted. Typically, hosts scan for devices during their start-up process.
When this happens, the Galaxy 65 Subsystem saves the WWN information for the host, but does not
Array A, partition 1
accessed by Accounting
Array A, partition 2
accessed by HR
Array B, partition 1
accessed by Engineering
Array B, partition 3
accessed by all hosts,
except Web server Array B, partition 2
accessed by HR and
Accounting
Array C (single-partition
array) accessed by all
hosts
Web server
Accounting
Engineering
HR