Re: [Fedora-livecd-list] Allowing livecd images large than 4GiB
On Tue, Dec 16, 2008 at 12:57:22 -0500,
Bryan J Smith <bjs(a)redhat.com> wrote:
Well, then I'd say you tested it. You're sure the filesystem is UDF
Plain, correct? It wasn't ISO 9660 Yellow Book (possibly as a result of
UDF not being accepted as an option for some reason)?
I am not sure how to tell. I changed things so the initscript was going to
mount it using a fs type of udf. On the test before I changed the drivers
and the fs type the mount failed.
I've actually never dissected the ISO files I regularly create
with
mkisofs. But I know I've gone beyond 4.0GiB (~4.3GB) before, so they
must be Level 3.
The livecd-creator process barfs in the squashfs file system is over
4 GIB compressed. The mkisofs documentation says this should happen
at 2 GiB. So I am not entirely sure what gives there.
We're kinda spoiled on Linux, because an .iso file != as written,
but
the kernel hides a lot of that in the block access. An .iso file, last
time I checked, is ISO 9660 "Yellow Book" (data) track. So I'm curious
if an .iso file, as well as written to optical media, is still a single
track for > 4.0GiB (> ~4.3GB), or multiple Yellow Book tracks with the
extent in the first.
I suspect it was one track, but I don't know for sure. I used k3b and the
burn iso dvd tool.
Depends. I was under the impression that when not using PC BIOS
floppy
emulation, but native mode with El Torito, it uses still requires and
accesses the ISO 9660 Yellow Track, which needs to have filenames
limited to 31 characters.
But there aren't many files visible at that level. A few things in the
equivalent of /boot and the rest is the file containing the squashfs
file system.