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CHAPTER 5: SAN LUN Mapping www.gateway.com
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Overview
When attaching more than one host system to a storage system, you may need
to more precisely control which hosts have access to which logical drives. In
addition to controlling availability on a controller port-by-port basis, you can
also further restrict access to a specific host system or single adapter in a host
system through SAN LUN mapping. As many as 512 SAN LUN mappings are
supported.
Terminology
The following table describes the terminology relating to StorView’s SAN LUN
mapping.
Accessing SAN LUN mapping
Clicking the SAN Mapping icon in the Configuration tool bar on the Main
window opens the SAN LUN Mapping window. Here you find a list of the specific
host HBA ports and their mapping details. You can view, name, create, and
remove mappings from this window. If no mappings are present, you can create
new mappings using the
Add New Map feature. If a mapping exists, selecting
an HBA port name displays the current mapping(s) and its parameters.
Term Description
Node name This is an eight byte, 16 character, hexadecimal number, uniquely
identifying a single fibre device. It incorporates the world wide
Name and two additional bytes which are used to specify the
format. In a host system with multiple FC ports, all adapters
typically use the same node name, but unique port names.
HBA port name (port
name) This is an eight byte, hexadecimal number, uniquely identifying
a single host HBA port. It incorporates the world wide name and
two additional bytes which are used to specify the format and
indicate the port number.
Mapping name This is a 32 character name that can be used to identify the host
system.
Read/write access A host can read and write to the logical drive.
Read only access A host can only read from a logical drive.
*Used in another mapping This notation marks a logical drive that has been mapped to
another host HBA port, but is available to be mapped to the
selected host HBA port. It is displayed when the condition above
has occurred and appears in the logical drive pull-down menu
selections. The logical drive with other mappings has an asterisk
next to the name.