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Switched Fabric Connection in Single Controller
In this type of connection, each SFP port is connected to an FC switch then to the host
adapters. Each logical partition is mapped to a single host channel ID. If you prefer path
redundancy, you can map a logical partition to IDs residing on two different channels.
Channels
Controller A
Host
CH0, CH1, CH2, CH3
Configuration information
Number of controllers
1
Host servers
4
Data path connection
The data paths are connected to one or more FC switches. The SAN
management measures, such as switch zoning and port binding, must
be taken to avoid multiple servers from accessing the same LUN.
If multiple servers detect a mapped volume, you have to avoid access contention using file
locking software, port binding, or zoning feature of the FC switches, which limits the access from
host to a specific LUN. If you have two servers in a clustered configuration, the clustering
software performs the access control.
IMPORTANT!
•
We suggest you use an enclosure-specific spare drive to prevent it from participating in
the rebuild of a logical drive on another enclosure. You can refer to the ID tags on the
host links to see the related LUN mapping and cable links routing paths.
•
You need an MPIO driver to manage the access via two different HBA ports. This driver
communicates with the system firmware and performs load balance and automated
distribution of I/O.
