Setup Guide

Configuring Storage 33
Reference Configurations
• Unified Mode — A unified configuration is one in which your PowerVault
MD1000 or PowerVault MD1120 storage enclosure is connected to one
host. In unified mode, your enclosure can be one of up to three enclosures
daisy-chained to a single port on the PERC 6/E card in your XenServer
host. See Figure 5-3 for an illustration of this configuration.
Figure 5-3. PowerVault MD1000 or PowerVault MD1120 Storage Enclosures – Unified
Mode
• Single Host, Split Backplane — In this configuration, one host contains
two PERC 6/E cards. The hard drives are split into two groups. On the
PowerVault MD1000 storage enclosure, eight drives are controlled by one
PERC 6/E, and seven drives are controlled by the other PERC 6/E. On the
PowerVault MD1120 storage enclosure, twelve drives are controlled by
each PERC 6/E. Daisy-chaining PowerVault MD1000 or PowerVault
MD1120 storage enclosures is not supported in split mode. See Figure 5-4
for an illustration of this configuration.
PERC 6/E
PowerVault MD1000/
MD1120 storage enclosures
in unified mode
Optional two expansion
enclosures