Galaxy A16F-R2431 Installation and Hardware Reference Manual
3-10
Sample Topologies
Channel Settings
Host
CH0 and CH1
Drive
Via system bus, through the backplane
Onboard Hub
Disabled
Configuration Information
RAID controller
6
Host server
Multiple
Data path connection
Fault-tolerant configuration where all host
ports on RAID subsystems are connected to
two channel busses, channel 0 and channel
1.
Host channel bandwidth
16 Gb/s
Max. number of drives
48
Configuration Rules:
1.
When cascading multiple RAID subsystems, you should disable the
onboard hub, and separately cross-link the host ports on different RAID
controllers.
2.
When connecting to a switched fabric, onboard hub should be disabled.
3.
Host ports on Controller A always connect to the host ports on the
Controller A of the next enclosure. Controller A is defined as one that is
installed in the upper slot location, usually the RAID controller
managing the whole subsystem.
4.
If Controller A fails, host ID/LUNs previously associated with
Controller A will be managed by Controller B.
5.
Depending on I/O characteristics, each configured array should be
properly optimized either for Random or Sequential I/Os.
6.
In the above diagram, the disk drives in each RAID subsystem are
configured into two logical drives.
7.
With fault-tolerant cabling, host multipathing software on application
servers is necessary.
