Figure 7. PERC H840 card ports — Eight enclosures with single path configuration
Redundant path support for PERC H840
The PERC H840 adapter can detect and use redundant paths to disks contained in enclosures. This provides the ability to connect two
SAS cables between a controller and an enclosure for path redundancy. The controller can tolerate the failure of a cable or Enclosure
Management Module (EMM) by utilizing the remaining path. When redundant paths exist, the controller automatically balances I/O load
through both paths to each disk. Load balancing increases throughput to virtual disks in storage enclosures and is automatically turned on
when redundant paths are detected. To set up your hardware to support redundant paths, see
Setting up redundant path support on the
.
NOTE:
This is applicable for PERC H840 only.
NOTE:
This support for redundant paths refers to path redundancy only and not to controller redundancy.
18
Features
