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DAS (Direct Attached Storage) Connection
This connection has more disk drives over SAS expansion links. With this connection, you can
create more logical groups of drives. These logical drives use more host channel IDs or LUN
numbers.
The two logical drives in the illustration below cannot equate the full power of the system. You
can attach one or two more expansion enclosures to achieve more end-to-end performance.
Channels
Controller A
Host
CH0, CH1, CH2, CH3
Configuration information
Number of controllers
1
Host servers
2
Data path connection
Simple end-to-end connections with fault-tolerant pairs
NOTE:
If a server has multiple data paths to a main storage, a multipathing software such as
MPIO, is needed.
