User manual

Fibre to SAS/SATA II RAID Subsystem
User Manual
115
Case 1: One Volume Set Mapped to Channel 0 LUN 0
When one Volume Set is created and mapped to Channel 0 LUN 0, the
Volume Set is Active in Controller 1 Port 0 (Host A channel), and
Standby in Controller 2.
Volume Channel/LUN Mapping Remarks
Volume Set #000 0 / 0
Channel 0 => Port 0 /
LUN 0 => Controller 1
Example: Channel Mapping in Fibre Host Channel
NOTE: When Volume Sets are created, the first Volume Set created (for
example: Volume Set #000) and assigned LUN 0 will be Active in
Controller 1 and Standby in Controller 2. The second Volume Set
created (for example: Volume Set #001) and assigned LUN 1 will
be Active in Controller 2 and Standby in Controller 1. The third
Volume Set assigned LUN 2 will be Active in Controller 1, and the
fourth Volume Set assigned LUN 3 will be Active in Controller 2.
In summary, all even number LUNs
assigned to Volume Sets will
be Active in Controller 1
and all odd number LUNs assigned to
Volume Sets will be Active in Controller 2
.
IMPORTANT: MPIO must be configured on the host system(s), in
order for redundant LUNs (two paths via Controller 1 and 2) to
appear as single LUNs.