Grub question (Ahem....help! Now it just says 'GRUB')

[res gzq]

Where do you find:

  fstab ?

John




----- Original Message -----
From: "Rick Stevens" <rstevens at vitalstream.com>
To: "Mark Knecht" <markknecht at gmail.com>; "Getting started with Red Hat
Linux" <redhat-install-list at redhat.com>
Sent: Tuesday, September 28, 2004 9:08 AM
Subject: Re: Grub question (Ahem....help! Now it just says 'GRUB')


> Mark Knecht wrote:
> >>>OK, I now see Imissed on important piece of info. SC7 was installed in
> >>>the MBR, and grub was installed (I think) on hda5. The boot process is
> >>>to boot SC7, and then from SC7 choose Windows or Linux. If Linux, then
> >>>it jumps to grub and I get the grub choices.
> >>
> >>I figured you'd have to complicate things. :-)
> >
> >
> > <blush>
> >
> >>>>>/dev/hda5 is marked as bootable, not hda7.
> >>>>
> >>>>I think that's irrelevant to GRUB.  Only your BIOS cares about that.
> >>>>
> >>>>
> >>>>>The machine has been booted since I moved hda5 and hda6. Why
> >>>>>did moving hda7 make any difference at all?
> >>>>
> >>>>I don't know.  Rick probably does.
>
> You need to check the fstab and see if you're using labels or partition
> numbers.  If you use partition numbers, moving hda7 may cause it to not
> mount.
>
> > I know Rick uses System Commander/Partition commander, but I'm unsure
> > as to his use of their boot tools. He may use grub, or he may do it
> > like I do. On a properly set up machine it's nice to use their tools
> > as you have partition control at boot time, but that's jsut my
> > preference. I was usign this tool set before I started with Linux. It
> > was the only way to boot multiple copies of Windows. Later I jsut
> > added Linux in the same way.
>
> My laptop still has SC7, but it's not active (it's been grubified), so
> I can't really get into it right now.
>
> >>>>>2) What do I do to get the machine booting again?
> >>>>
> >>>>I'd say to boot with your distro disk #1 into rescue mode, let it
> >>>>mount your system on /mnt/sysimage, pop out the CD, and then
> >>>>
> >>>> chroot /mnt/sysimage
> >>>> grub-install /dev/hda
> >>>
> >>>This, I think, would put grub in the MBR, wouldn't it?
> >>
> >>Yes.  I've seen precious few reasons not to.  Yours may be one.
> >>
> >>
> >>>If so that's
> >>>not what I want to do, or at least I think I don't. I still want to
> >>>boot SC7 first. How about
> >>>
> >>>grub-install /dev/hda5? (Or should it be hda7 since that's the
> >>>partition that caused the problem when I moved it. That'swhat I'm
> >>>confused about. What did grub really put on /dev/hda7?
> >>>
> >>>Or possibly grub really is on /dev/hda5, which moved successfully, but
> >>>then moving hda7 caused grb to get confused? Does grub look at the
> >>>actual location that the root partition exists at, or does it just use
> >>>the partition number. (What I thought...)
> >>
> >>That's beyond my level of expertise.  Rick Stevens can chime in here.
> >>The most important thing I can guess is that GRUB should be installed
> >>on whichever partition is marked bootable.  (Yeah, now it matters, I
> >>think.)  I still can't say which partition it should be.  The Fine
> >>Manual
>
> Remember, the BIOS of your machine will pass control to the MBR of the
> primary drive.  Whatever is installed there is then responsible for
> booting the rest of the stuff.  For grub to do the full boot duties, it
> needs to be installed in the MBR of your primary hard drive.
>
> If you want SC7 to do the booting, it must be installed on the MBR of
> the primary hard drive.  grub must be in the root directory of whatever
> partition you tell SC7 contains Linux, and you must tell SC7 which
> partition that is.  It's usually pretty good at figuring it out, but
> double check.  For most people, this would be the partition that
> contains the /boot directory.
>
> Sorry for my inactivity on the list the last few days, but it's been a
> bit, well, "farking crazy" here.
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -         Okay, who put a "stop payment" on my reality check?        -
> ----------------------------------------------------------------------
>
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