My Oracle Support Banner

Oracle Linux: How To Unmount A Busy Mount Point (Device Busy) (Doc ID 1277636.1)

Last updated on OCTOBER 14, 2022

Applies to:

Linux OS - Version Oracle Linux 4.4 and later
Oracle Cloud Infrastructure - Version N/A and later
Linux x86
Linux x86-64
Linux Itanium

Goal

Most storage administration activities require that a file system be unmounted; all open files on the file system must be closed first or umount(8) will fail.  Resources such as lsof(8) may reveal the offending process, but if not alternatives to a system reboot may be preferred.

Solution

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Goal
Solution
 Use Lazy umount(8)
 Use Forced Unmount
 Use /proc/<pid>/fd
 Examine The Kernel Data Structures
 Check For Loop-Mounted Devices
 As A Last Resort -- Reboot

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.