Proware EP-2243D-F4S3, User Manual

Page: 117 / 138

Fibre to SAS/SATA II RAID Subsystem
User Manual 117
Case 4: Two Volume Sets each Mapped to Channel 0&1
When a Volume Set is created and mapped to Channel 0&1 LUN 0 , the
Volume Set is Active in Controller 1 Ports 0 and 1 (Host A and Host B
channels), and Standby in Controller 2 .
When a second Volume Set is created and mapped to Channel 0&1 LUN
1 , the Volume Set is Active in Controller 2 Ports 0 and 1 (Host A and
Host B channels), and Standby in Controller 1 .
In this case, all 4 ports will be active when the host system does IO on the
2 LUNs. This mode is Load Balance.
Volume Channel/LUN Mapping Remarks
Volume Set #000 0&1 / 0
Channel 0&1 => Ports 0 and 1 /
LUN 0 => Controller 1
Volume Set #001 0&1 / 1
Channel 0&1 => Ports 0 and 1 /
LUN 1 => Controller 2
NOTE: 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.