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EonStor GSa 3000 Series Hardware Manual
DAS (Direct-Attached) 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.
CH1 ID112
LD0
CH3 ID112
LD1
CH0 ID112
CH2 ID112
H B A 1
H B A 0
H B A 1
H B A 0
C H 1 ID 11 2
C H 0 ID 11 2
C H 3 ID 11 2
C H 2 ID 11 2
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.
