Centos Solution to "Warning: Unable to open /dev/fd0 read-write (Read-only file system). /dev/fd0 has been opened read-only."

Warning: Unable to open /dev/fd0 read-write (Read-only file system).  /dev/fd0 has been opened read-only.

That's a very annoying error, it's simply because Centos for some reason thinks it's wise to load the "floppy" kernel module, who has a floppy drive?  I haven't seen or used a floppy for over 12 years!

It's more than just annoying, if you probe the drives attached to your system, eg. with grub or partprobe, it keeps trying to locate a floppy dirve that doesn't exist and literally takes a few minutes to let you complete the task of grub or partprobe or related commands.

The solution, remove the "floppy" kernel module

rmmod floppy

That takes effect right away,now grub will load right away and partprobe will take a few seconds at most.

You'll also want to prevent it from loading again in the future at boot time:

For Centos/RHEL

echo "alias floppy off" >> /etc/modprobe.conf

For Debian based Distros

echo "blacklist floppy" >> /etc/modprobe.d/blacklist

The command above tells the kernel not to load the "floppy" module ever again by adding "blacklist floppy" to the blacklist list.


Tags:

centos, unable, dev, fd, quot, floppy, kernel, module, haven, probe, eg, grub, partprobe, locate, dirve, doesn, task, commands, rmmod, ll, loading, rhel, echo, alias, etc, modprobe, conf, debian, distros, blacklist, adding,

Latest Articles

  • Centos 7 how to save iptables rules like Centos 6
  • nfs tuning maximum amount of connections
  • qemu-kvm error "Could not initialize SDL(No available video device) - exiting"
  • Centos 7 tftpd will not work with selinux enabled
  • Debian Ubuntu Mint Howto Create Bridge (br0)
  • How To Control Interface that dhcpd server listens to on Debian based Linux like Mint and Ubuntu
  • LUKS unable to type password to unlock during boot on Debian, Ubuntu and Mint
  • Debian Ubuntu and Linux Mint Broken Kernel After Date - New Extra Module Naming Convention
  • Wordpress overwrites and wipes out custom htaccess rules and changes soluton
  • Apache htaccess and mod_rewrite how to redirect and force all URLs and visitors to the SSL / HTTPS version
  • python 3 pip cannot install mysql module
  • QEMU-KVM won't boot Windows 2016 or 2019 server on an Intel Core i3
  • Virtualbox vbox not starting
  • Bind / named not responding to queries solution
  • Linux Mint How To Set Desktop Background Image From Bash Prompt CLI
  • ImageMagick Convert PDF Not Authorized
  • ImageMagick Converted PDF to JPEG some files have a black background solution
  • Linux Mint Mate Customize the Lock screen messages and hide username and real name
  • Ubuntu/Gnome/Mint/Centos How To Take a partial screenshot
  • ssh how to verify your host key / avoid MIM attacks