Oracle Linux: How to Dynamically Change Multipath Write Protection Status from Read-Only to Read/Write (Doc ID 2660512.1)

Last updated on MARCH 14, 2023

Applies to:

Goal

By default, Oracle Linux (OL) fully provisioned device mapper multipath storage devices are readable/writable as denoted by their write protection status of wp=rw (read/write) e.g.:

In the event of underlying fabric or network storage events, it's possible that the write protection status of multipath devices changes from wp=rw (read/write) to wp=ro (read-only) before automatically reverting to the original read/write status.

In some cases, however, the write protection status of devices may remain wp=ro (read-only) beyond the resolution of the storage event, preventing writes to devices and necessitating a system reboot to restore their read/write status.

This document describes how to configure device mapper multipath to allow users to manually refresh/set the write protection status of multipath devices from read-only to read/write.

Solution

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