PAC STORAGE PS 4000 Gen2 Series, Руководство по оборудованию

Страница: 50 / 108

2-24 Chapter 2: Hardware Installation
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.
LD0 LD 1
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 SAN storage, a multipathing software such as MPIO, is
needed.
CH 1 ID 112 CH3 ID 112
HB A 0
HB A 1
HB A 0
HB A 1
CH 0 ID 112 CH2 ID 112