Galaxy A16F-R2431 Installation and Hardware Reference Manual
3-6
DIP Switch
3.2.6 Unique Identifier
The unique identifier is a user-specified, 16-bit hexadecimal number that is
used to generate Fibre Channel port names and node names. By factory
defaults, each RAID controller is assigned with a separate hexadecimal
number and the firmware then determines which unique identifier to use. It
is usually not necessary to change the default identifier. To see how to use
the front panel LCD screen or the terminal emulation program to enter the
unique identifier, please refer to the
Fibre-to-SATA RAID Subsystem
Operation Manual
.
3.2.7 ID/LUN Mapping
I/O load distribution between the RAID controllers is determined by the
host ID/LUN mapping. Different logical groups of drives can be mapped to
the host IDs managed by different RAID controllers. For access through
different host links, e.g., in a multipathing configuration, a logical drive
configuration can be associated with different ID/LUN combinations on
different host channels. In this case, file locking or multi-path control is
necessary. ID/LUN mapping procedures are described fully in the
Fibre-
to-SATA RAID Subsystem Operation Manual
.
3.3 DIP Switch
Figure 3-2: Rear Panel DIP Switches
DIP switches can be used to determine the following parameter:
Onboard hub:
The onboard hub combines the host ports on partner
controllers into the same host channel. The configuration is diagrammed
below: