Mounting filesystems in /etc/fstab at system boot

Originally Posted by rknichols For RHEL/CentOS 6....Special filesystems critical to the boot sequence (/proc, /sys, ...) get mounted early by the fstab that is in the initrd prior to mounting the real root filesystem.

Thus you are saying initrd (actually initramfs cpio archive) stores an fstab file version used to mount boot critical filesystems (/proc, /sys, ...) prior to mounting the real root filesystem, right ?

Originally Posted by cianfa72 Thus you are saying initrd (actually initramfs cpio archive) stores an fstab file version used to mount boot critical filesystems (/proc, /sys, ...) prior to mounting the real root filesystem, right ?

Actually, I misspoke. I had one there at one time to do something special, but looking at it just now I see that the mounts for /proc, /sys, /dev, /dev/pts, and /dev/shm (and of course the initial mount of the root filesystem) are hard-coded in the init script in the initrd, and no fstab is needed or present. You can have an fstab there, and any special mount options for the early mount of the root filesystem will be handled. Plus, if you include the "fstab-sys" dracut module, you can have other filesystems mounted prior to turning control over to the real init process.