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Enter the LUN number: 1
Enter the Fibre Channel port: 5
Command (h for help): l
Enter the LUN number: 2
Enter the Fibre Channel port: 5
Command (h for help): l
Enter the LUN number: 3
Enter the Fibre Channel port: 9
Command (h for help): p
Enter the LUN number (1-3, default is all): <enter>
LUN 1 -- 3072 Mb
ports: 5
access: Open access
LUN 2 -- 3072 Mb
ports: 5
access: Open access
LUN 3 -- 2048 Mb
ports: 9
access: Open access
Command (h for help):
From the last command, we can see that the port five has been assigned to LUN one and three, and port nine has been
assigned to LUN two and three. Since we are sharing a port between two LUNs, we need to specify a LUN mask so that the
HBA will only be able to access the desired LUN.
4.3.4 Creating LUN Masks
The next configuration option available to the RAM-SAN is the ability to create LUN Masks for individual Fibre Channel
ports. This allows the administrator to specify which HBAs are allowed to communicate with each LUN. The ‘a’ command
will add a world wide name to a LUN’s access list, activating the masking of that LUN to all other HBAs. The following
command sequence will add all four world wide names to our LUN mask.
Command (h for help): a
Enter LUN number: 1
Enter the world wide name (colon delineated): 11:11:11:11:11:11:11:11
Command (h for help): a
Enter the LUN number: 2
Enter the world wide name (colon delineated): 22:22:22:22:22:22:22:22
Command (h for help): a
Enter the LUN number: 3
Enter the world wide name (colon delineated): 33:33:33:33:33:33:33:33
Command (h for help): a
Enter the LUN number: 3
Enter the world wide name (colon delineated): 44:44:44:44:44:44:44:44
Command (h for help): p
Enter the LUN number (1-3, default is all): <enter>
LUN 1 -- 3072 Mb
ports: 5
access: 11:11:11:11:11:11:11:11
LUN 2 -- 3072 Mb
ports: 5
access: 22:22:22:22:22:22:22:22
LUN 3 -- 2048 Mb
ports: 9
access: 33:33:33:33:33:33:33:33
44:44:44:44:44:44:44:44
Command (h for help):
RAM-SAN User’s Guide Texas Memory Systems, Inc. (February 7, 2003) 4-4