RE: Unmounting and ejecting the root fs on shutdown.

From: Mr. James W. Laferriere (
Date: Wed Feb 28 2001 - 11:26:25 EST

        Hello Per , Yah I can understand high volume lists ;-)
        But combined with the dropping of a copy of the iso-image
        you create , A Howto ??? Please . Tia , JimL

On Wed, 28 Feb 2001, Per Erik Stendahl wrote:
> Oops, I almost missed this one. High-volume mailinglists... :-)
> > > Hello Per , Has anyone gotten back to you on this subject ?
> > > I as well am very interested in any information about releiving
> > > this difficulty . Tia , JimL
> > Such a CD would be very nice; one or two people do have this already,
> > though. Have you tried using a ramdisk for root, and mounting
> > the CD as
> > /usr?
> Well, doing this on your own certainly will teach you a lot about
> Linux I tell you. :-)
> I still dont know how to make the kernel unlock and eject the CD on
> shutdown. I haven't been able to pinpoint the shutdown sequence in
> the kernel sources yet. :-)
> What I do know now is how to make the kernel not lock the CD in the
> first place. Simply ioctl(/dev/cdrom, CDROM_CLEAR_OPTIONS, CDO_LOCK)
> from /linuxrc in the initrd. This way I can remove the CD anytime
> I please which is enough for me. And I dont have to patch the kernel.
> Mounting a ramdisk for / is doable (I think) but kludgy since you have
> to symlink or mount so many subdirectories. Right now I only have /var
> in a ramdisk (and why _WHY_ is /etc/mtab located in /etc and not
> in /var??).
> Anyways the CD works - and yes, being able to boot Linux w/o touching
> the harddrives or the network is nice! :-) I might even put it on the
> web once I get it cleaned up. Though the ISO is ~200 Mb.
> Cheers
> /Per Erik Stendahl
       | James W. Laferriere | System Techniques | Give me VMS |
       | Network Engineer | 25416 22nd So | Give me Linux |
       | | DesMoines WA 98198 | only on AXP |

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Wed Feb 28 2001 - 21:00:16 EST