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Using Your RAID Enclosure
Host Cabling for Redundancy
To make sure that the RAID storage array will remain accessible to the host, establish a minimum of two
physical paths from each host to the RAID controller modules. The following examples show host
cabling for redundancy.
One Host with Two Cable Connections
Figure 3-1 shows a single host with two HBAs. Both HBAs have two ports, but use only a single port.
Each HBA is connected to one RAID controller module in the RAID enclosure. Each RAID controller
module has one port.
Figure 3-1.
One Host with Two Cable Connections
This cabling topology, when used with alternate path software, ensures a redundant path from the host
server to the virtual disks. If the connection from In-0 on the RAID controller to the host port becomes
unavailable, the alternative path software will transfer I/O activity on RAID controller module 0 to RAID
controller module 1. While RAID controller module 0 is unavailable, the host can access all virtual disks
through RAID controller module 1.
One Host with Four Cable Connections
Figure 3-2 shows one host with two HBAs. Both HBAs have two ports. Each HBA port is connected to
one of the RAID controller modules in the RAID enclosure. Each RAID controller module has two ports.
MD3000 RAID Enclosure
dual-HBA host server
RAID controller module 1
RAID controller module 0
Содержание PowerVault MD3000
Страница 60: ...60 Installing Enclosure Components Figure 4 9 Removing and Installing the Midplane 1 midplane 1 ...
Страница 68: ...68 Troubleshooting Your Enclosure ...
Страница 100: ...100 Glossary ...