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FreeBSD: Forcefully unmount a disk partition to get rid of device busy error

September 8, 2019

Under FreeBSD if you get error device busy while unmounting file system then you can forcefully unmount a disk partition or mount point. You can pass -f option to mount command. It forces the read/write mount of an unclean file system. Suppose you would like to unmount /cdrom forcefully then type command (login as a root user use su or sudo command):

# umount -f /cdrom

Where,

  • -f : Forces umount to unmount a disk partition or mounted system

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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