Deployment Guide

Linux

There are three types of configurations supported for Linux host servers:

• Single Path configuration: This uses a simplified cabling scheme, but does not provide redundancy or

fault-tolerance. Use this when the OS or a higher-level application is being used for data resiliency.

• Symmetric Multipath configuration: This uses a cascading configuration that provides path

redundancy, but does not provide against enclosure loss.

• Asymmetric Multipath configuration: This uses a high availability configuration that allows the host

server to reach any enclosure if a path or single enclosure is lost

For multipath configurations, Linux Device Mapper Multipath (DMMP) must be configured. Dell

recommends Failover policy. To ensure proper functionality, verify the following values are set in /etc/

multipath.conf:

• path_grouping_policy failover

• failback manual

NOTE: For more information about supported Linux OSs, see the Dell Storage Enclosure Support

Matrix available at Dell.com/support.

Linux Single Path configuration

Figure 6. Linux Single Path configuration