MPIO: Installation and configuration

MPIO or MultiPath I / O is a Windows feature that allows multiple path support for storage.

MPIO addresses two issues: performance and reliability.

The majority of storage bays have two controllers for reliability reasons. Whether you are a SAN or a DAS, the servers are “attached” to the array via the two controllers, which allows you to present a volume to the server with multiple paths.

Representation of a volume x presented to a server without MPIO:

On Windows this is how it is represented:

The same volume is seen many times.

Prerequisites for configuration:

  • In order to be able to configure the MPIO, it is necessary to present at least one volume to the server.

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