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Address and Device Mapping
Devices attached to the router are discovered during power on. The router defaults to
AUTO mapping mode, which automatically maps the SCSI devices at each power on. The
router maps devices sequentially as it scans the channels and discovers the devices
(devices are discovered by channel, lowest SCSI ID and LUN first). Devices are mapped
to FC LUNs, starting from LUN 0 to LUN 63 (64 LUNs are supported, including an
optional router LUN).
You can select the FIXED mapping mode to lock the current device mapping so that it
doesn’t change during subsequent power ons, even if devices are added, moved, or
removed. FIXED is recommended for environments where device configuration may
change and a fixed mapping from the application to the target devices is required. Devices
added after selecting FIXED will be automatically mapped to an available FC LUN. See
Changing the Mapping Mode (AUTO or FIXED) on page 3-20.
Figure A-1 on page A-2 is an example of how the router will map SCSI devices (SCSI
channel:target:LUN) to FC LUNs.