[Linux-aus] Remastering Fedora Core 4
Greg 'groggy' Lehey
grog at lemis.com
Wed Jun 29 06:43:02 UTC 2005
On Tuesday, 28 June 2005 at 14:25:12 +1000, Del wrote:
> Greg 'groggy' Lehey wrote:
>> I've spent the weekend trying to create a custom version of Fedora
>> Core 4 (see http://www.lemis.com/grog/diary-jun2005.html#25). All
>> works well (now) except for booting. I can't find the bootstrap in
>> the directory tree (isolinux/isolinux.bin is the wrong size, and it
>> doesn't appear to be intended for CD booting), and I don't know of any
>> tools to extract it from the bootstrap area.
>> There's a whole lot of detail in the URL above, so I won't waste
>> bandwidth by repeating it here. Does anybody have any pointers?
> In reference to your diary entry (which I did eventually find by
> scrolling down from the URL above),
Oops, sorry, should have been
> 1.44MB is NOT the correct size for an ISO boot image constructed
> with --no-emul-boot. That's the correct size for the old emulated
> El Torito stuff but no longer correct these days for bootable DVDs
> and things. A bootable ISO image is essentially a bootable ISO
> image -- not a bootable floppy disk image. > Also, your script is
> fundamentally incorrect because you need to specify a boot image
> size with no-emul-boot.
When did you look at this entry? In the version $Id:
diary-jun2005.html,v 1.40 2005/06/28 00:43:34 grog Exp $, I state:
Sent a message out to the Australian Linux groups today about my
DVD boot problems, and in the evening got a reply from Glen Turner
pointing to the problem: turned out that the bootstrap was correct
after all, but that I had a bug in my burn script (now corrected):
there are at least two kinds of bootstrap you can put in an ISO
image. The older style is the El Torito bootstrap, effectively an
image of a floppy. The other is a native bootstrap, which can be of
any length. That's what I wanted, and you specify it with the
Not that that removed all problems: after that I could run the
bootstrap, but it failed again:
ISOLINUX 3.08 2005-05-19 isolinux: Image checksum error, sorry...
More head-scratching to do there. I may actually have to install
Fedora Core 4 to do it right.
This was up long before you sent this message. Also, the script has
been fixed in $Id: mkcd,v 1.2 2005/06/28 00:31:29 grog Exp $.
On the other hand, for a general burn script -no-emul-boot is not
always right. I've put it in there for now, but it really should be a
Do you have any opinion on getting the image checksum correct?
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