---
name: "mpath"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/mpath/4"
---

# mpath(4)

SCSI multipath

## NAME

**mpath** – SCSI multipath

## SYNOPSIS

**emc\* at scsibus?** **hds\* at scsibus?** **rdac\* at scsibus?** **sym\* at scsibus?**

**mpath0 at root**

## DESCRIPTION

**mpath** provides access, I/O multiplexing, and failover support to SCSI logical units that can have multiple physical connections to the system. It uses connections presented by path drivers, for example [sym(4)](/sym/4.md), as backends to a single device attached to its own scsibus(4).

## SEE ALSO

[ioctl(2)](/ioctl/2.md), [emc(4)](/emc/4.md), [hds(4)](/hds/4.md), [intro(4)](/intro/4.md), [rdac(4)](/rdac/4.md), [scsi(4)](/scsi/4.md), [sym(4)](/sym/4.md)

## HISTORY

The **mpath** driver first appeared in OpenBSD 4.7.

## AUTHORS

David Gwynne ⟨*dlg@openbsd.org*⟩.