Chapter 3: Subsystem Connection
3-11
Channel Settings
Host
CH0 and CH1
Drive
Via system bus, through the backplane
Onboard Hub
Disabled
Configuration Information
RAID controller
2
Host servers
2 or more in the switched fabric
Data path connection
Fault-tolerant configuration
Host channel bandwidth
16Gb/s
Max. number of drives
16
Configuration Rules:
1.
For details on the relationships among host links, host ID/LUNs, and
logical configurations, you may refer to your firmware operation
manual.
2.
Shown above is a SAN application using independent host links to the
host ports on two RAID controllers.
3.
The configuration ensures that an application server can always access a
storage array even in the event of cabling component failure.
1.
For connections to N_port on FC switches, the onboard hub should be
disabled.
2.
When the onboard hub is disabled, the host ports on different RAID
controllers need to be separately connected to switch ports.
3.
If Controller A fails, LUNs previously associated with Controller A will
be managed by Controller B.
4.
Depending on I/O characteristics, each configured array should be
properly optimized either for Random or Sequential I/Os.
5.
You may also partition a logical capacity into two or more volumes and
let each server access separate volumes.
6.
With fault-tolerant cabling, host multipathing software is necessary.