Proware EP-2243D-F4S3, User Manual

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Fibre to SAS/SATA II RAID Subsystem
User Manual 119
Case 6: Four 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 .
When a third Volume Set is created and mapped to Channel 0&1 LUN 2 ,
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 fourth Volume Set is created and mapped to Channel 0&1 LUN 3 ,
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 does IO on the 4 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
Volume Set #001 0&1 / 2
Channel 0&1 => Ports 0 and 1 /
LUN 2 => Controller 1
Volume Set #001 0&1 / 3
Channel 0&1 => Ports 0 and 1 /
LUN 3 => 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.