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Unable to Boot fdubcd.img.gz

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#1 dsolomon


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Posted 30 June 2011 - 10:02 PM

here is my blah.cfg file contents that boots my fdubcd.img.gz


MENU LABEL ^:cheers: Blah





LINUX /isolinux/memdisk

INITRD /ubcd/images/fdubcd.img.gz

here is the results of my boot
Posted Image

i have triple-checked my paths. they are correct. and my filenames are correct too.

i am using mkisofs.exe for creating my iso. im using
mkisofs -r -o output.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table root

i am also on syslinux v4.04. the fdubcd.img.gz file im trying to boot is 2,614KB

is there something i am doing wrong? everything else in my iso works fine (livexp, partition magic, konboot, AVG rescue, etc...)

EDIT: i have done some testing on trying to narrow down where my problem lies. and it seems its the way im authoring my ISO with mkisofs.exe

My Testing was with UBCD 5.03
if i extract the contents of UBCD 5.03 into a folder and try to re-author it with mkisofs - i get the same error as stated above.

what could i do to prevent this happening in my multiboot ISO ?

EDIT: After further testing - i have found a 'workaroud'
if i create a minimal sardu.iso with sardu v2.0.4beta3 - and insert the contents of my own troubled ISO (minus the syslinux/isolinux boot files - boot.cat, isolinux.bin, memdisk, etc...) by using ultraISO - everything works.

the problem seems to be the way im creating my iso with mkisofs

#2 sbaeder


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Posted 01 July 2011 - 08:52 PM

the problem seems to be the way im creating my iso with mkisofs

So, what is the exact command you are using? And are you using the matching boot loader - isolinux.bin (i.e ALL the bits and pieces from the same Sys/Isolinux distribution including memdisk! )

Inside winbuilder, this is the command I generate...

ShellExecute: [Open] using: [%BaseDir%\Projects\Tools\Win7PE_SE\mkisofs.exe] with parameters: 

[-v -iso-level 4 -l -J -joliet-long -R -volid "Win7PE" -A "GRLDR/MKISOFS" -sysid "Win32" -b "isolinux/isolinux.bin" 

 -no-emul-boot -boot-load-size 4 -c isolinux/boot.cat -boot-info-table -duplicates-once 

 -o "%BaseDir%\ISO\Win7PE_x86.ISO" "%BaseDir%\Target\Win7PE_SE"]

p.s. doesn't ubcd have scripts that remaster it? Look at them for how they issue mkisofs...

Good luck!

#3 Icecube


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Posted 01 July 2011 - 11:05 PM

/ubcd/images/fdubcd.img.gz is not a valid ISO9660 name.

I think you will need at least the -l option for mkisofs ("-iso-level 4" works for sure).

There is a batch file in UBCD to rebuild the ISO: ubcd\tools\win32\ubcd2iso.cmd

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