Subject: Re: G4 yaboot questions
From: Joshua Gitlin (jnet@brandeis.edu)
Date: Mon Nov 06 2000 - 16:06:17 MST
Stefan,
I, too, am quite confused about yaboot/bootscripts. hehe is
what i do know:
hd is an alias for your hard drive, the first (master) ATA
drive on the first bus. ultra0 is the exact same. i have two drives,
my main hard drive in that spot and a secondary ATA drive (a slave)
above it. Linux is on this slave.To access the slave drive in yaboot
or Open Firmware, use ultra1.
-Josh
>There have been so many questions and answers (many wrong I think)
>about using yaboot on a G4 that IMHO all archives are quite
>confusing. I'm trying to set up a dual-boot system using the
>bootscript, having already installed YDL 1.2 (not 1.2.1, but I'm
>using the latest yaboot incarnation from 1.2.1).
>
>I willingly submit to all flames and ask these questions, which IMHO
>also are not addressed completely in any official documentation I've
>seen. I promise that when I finally figure it out, I will write yet
>another how-to that makes sure these are ALL answered in ONE spot!
>If someone will kindly answer each one in turn, I'd be very happy:
>
>1. YDL updates says mistakes were made, there should be 4 slashes in
>front of vmlinux, not two, in yaboot.conf. Does this 4-slash rule
>also apply to the procedure to set OF to select either yaboot or
>bootscript (setenv blah blah blah)? And does it also apply to the
>bootscript text?
>
>2. All references to the hard drive in the dox I can find use the
>terminology "hd". But there have been lots of references in archives
>to "ultra0" and even "ultra1". Can I get a definitive statement of
>which to use and when and why?
>
>3. In yaboot.conf, "hd:," (that's hd colon comma, no space)
>supposedly refers to "the first HFS partition of the first IDE hard
>drive." Apparently if I'm not on the first partition, I should be
>putting the partition number in thusly: "hd:N," (that's hd colon
>partition# comma, no space). True?
>
>4. w.r.t. question 3, both vmlinux and yaboot are on the Mac boot
>partition (in the System Folder), so N should always refer to that
>Mac boot partition alone, no?
>
>5. w.r.t. question 4, where does the partition for the root device
>(/dev/hdXX) come in? Surely it must appear somewhere.
>
>6. In the bootscript, consider the line:
>
> " Booting Yaboot ..." cr " boot hd:,\\yaboot.tbxi" eval
>
> Pending other answers, this line implies that the yaboot
>binary must be named exactly yaboot.tbxi, no? That is, does the tbxi
>refer only to the file type or does it reflect the exact name of the
>file? If the former, I guess I need to make sure the file type is
>tbxi, using FileBuddy for example? See also question 7.
>
>7. In the bootscript, consider the line:
>
> " Booting Mac OS ..." cr " boot hd:,\\:tbxi" eval
>
> Here, the tbxi refers strictly to file type, no? The real
>target is the ROM, no? ("Mac OS ROM" has type tbxi, but tbxi does
>not appear in the name of the ROM file). And since there have been
>lots of scattered OFFICIAL blunders (2 slashes instead of 4, or the
>infamous "txbi" instead of "tbxi"), is it true that there is -no-
>colon before yaboot.tbxi (booting to Linux), but there -is- a colon
>before tbxi (booting to MacOS)?
>
>The answer to any one of these questions may bring a "suffer the
>fools" response but I really don't care. I think I even know the
>answer to a couple of them. But when you're faced with it not
>working and you don't know the answers to ALL of the above, the
>combinatorial problem you face is practically insurmountable unless
>you view Linux as a playtoy, like dice... and I'm really trying hard
>not to do that.
>
>
>Stefan Jeglinski
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