![]() Once we installed the Device Mapper Multipathing. So OS detects two devices: /dev/sdb and /dev/sdc. One lun assigned to the single server via two wwn number of both cards. It aggregates or combines the multiple I/O paths between Servers and Storage, so it creates a single device at the OS Level.įor example, Lets say a server with two HBA card attached to a storage controller with single ports on each HBA cards. This article describes you the step by step procedure to configure the Multipathing in Linux (RHEL7/CentOS7) using Device Mapper Multipathing (DM-Multipath) and helps you to understand the multipath configuration.ĭevice Mapper Multipathing (DM-Multipath) is a native multipathing in Linux, Device Mapper Multipathing (DM-Multipath) can be used for Redundancy and to Improve the Performance.
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