Dell PowerVault MD3000, Hardware Owner'S Manual

Page: 43 / 102

Using Your RAID Enclosure
43
Figure 3-2. One Host with Four Cable Connections
This cabling topology, when used with alternate path software, ensures a redundant path from the host to
the virtual disks. If any component (HBA, HBA port, cable, RAID controller module port, or RAID
controller module) fails, the host can still access the virtual disks through an alternate path.
NOTE:
This configuration is the most redundant for one host directly connected to a single array module.
Two Hosts, Each with Two Cable Connections
Figure 3-3 shows two hosts. Each host has two HBAs. (Both HBAs may have two ports, but in this figure
use only a single port.) Each HBA is connected to one RAID controller module in the RAID enclosure.
Each RAID controller module has two ports.
Figure 3-3. Two Hosts, each with Two Cable Connections
This cabling topology, when used with alternate path software, ensures a redundant path from the host to
the virtual disks. If any component (HBA, HBA port, cable, RAID controller module port, or RAID
controller module) fails, a host can still access the virtual disks through an alternate path.
NOTE:
This configuration is the most redundant for two hosts directly connected to a single RAID enclosure.
dual-HBA host server
RAID controller module 1
RAID controller module 0
MD3000 RAID Enclosure
MD3000 RAID Enclosure
dual-HBA host server dual-HBA host server