Dual boot

[David Rose]

    GNU GRUB  version 0.97  (640K lower / 3072K upper memory)

 [ Minimal BASH-like line editing is supported.  For the first word, TAB
   lists possible command completions.  Anywhere else TAB lists the possible
   completions of a device/filename.]

grub> root (hd
 Possible disks are:  hd0 hd1

grub> root (hd0,0)
 Filesystem type unknown, partition type 0x7

grub> root (hd1,
 Possible partitions are:
   Partition num: 0,  Filesystem type is ext2fs, partition type 0x83
   Partition num: 1,  Filesystem type unknown, partition type 0x8e

grub> root (hd1,0)
 Filesystem type is ext2fs, partition type 0x83


On Thu, Oct 14, 2010 at 1:07 PM, Joshua Judson Rosen
<rozzin at geekspace.com>wrote:

> David accidentally sent this to me instead of the list;
> bringing it back listward...:
>
> David Rose <DRose at Proviss.com> writes:
> >
> >  Josh, thanx for the feedback.  When I do the steps you suggest, grub
> > (v 0.97) gives me:
> >     Possible disks are:  hd0 hd1
> >
> > Based on that, how would I configure my grub conf file?
>
> What does it do/say when you try tab-completing on "root (hd0,"
> and "root (hd1,"?
>
> You can also actually run through a whole series of commands
> (all the way to boot) from GRUB's command-line interface--
> should be quicker than `edit the grub.conf and see if it works',
> especially since you can verify things one command at a time.
>
> > By the way, I currently have a work-around by disabling the primary
> > drive in the BIOS, but that's hokey.  I'd still like to get this
> > working for convenience and my edification.
>
> That actually sounds like exactly the sort of thing I was talking about,
> as having potential to mess-up GRUB's notion of which drives have
> which number....
>
> > On 10/13/2010 11:10 AM, Joshua Judson Rosen wrote:
> > > John Abreau<jabr at blu.org>  writes:
> > >> On Fri, Oct 8, 2010 at 5:58 PM, David Rose<DRose at proviss.com>  wrote:
> > >>> I ran the "fdisk -l sdb" and it told me that there was an NTFS file
> system
> > >>> with the correct amount of space so it appears that it recognizes the
> drive.
> > >>>
> > >>> I tried (hd1,1) and it gives me an "Error 22: No such partition".
> > >>
> > >>
> > >> Grub's (hd1,1) corresponds to /dev/sdb2. Is the NTFS filesystem on
> /dev/sdb2?
> > >> If it's actually on /dev/sdb1, then the grub equivalent would be
> (hd1,0)
> > > I don't think that's exactly true: if I recall correctly, GRUB (version
> 0.x)
> > > just counts the drives starting from zero, regardless of which
> controller
> > > or channel the drives are attached to. If Linux is calling it `sdb'
> because
> > > it's attached to the second controller, but there's no `sda' actually
> attached
> > > (or powered-on), then `sdb' in Linux may well be `hd0' in GRUB.
> > >
> > > Also, partition-numbers start at 1 only in GRUB 0.x (now called "GRUB
> Legacy");
> > > in `GRUB 2' (version 1.x, which used to be called "PUPA"),
> partition-numbers
> > > start at *zero*. I didn't see it specified what version of GRUB is in
> use,
> > > though I guess it's GRUB 0.x (Legacy) from the `grub.conf' syntax used.
> > >
> > > And, David: are you just doing this by `brute force', rebooting every
> time
> > > to see if a change is viable? Or have you tried tab-completion in
> GRUB's
> > > command-shell? From the manual:
> > >
> > >      To help you find out which number specifies a
> > >      partition you want, the GRUB command-line (*note Command-line
> > >      interface::) options have argument completion. This means that,
> for
> > >      example, you only need to type
> > >
> > >           root (
> > >
> > >         followed by a<TAB>, and GRUB will display the list of drives,
> > >      partitions, or file names. So it should be quite easy to determine
> the
> > >      name of your target partition, even with minimal knowledge of the
> > >      syntax.
>
> --
> "Don't be afraid to ask (λf.((λx.xx) (λr.f(rr))))."
>
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