CentOS - May 2020 - Custom ISO

Hi All,

I am trying to make a customer ISO. When I run this command:
mkisofs -o $DESTINATION_FILE -b isolinux/isolinux.bin -c boot.cat \
        -no-emul-boot -boot-info-table \
        -V "$NAME" -boot-load-size 4 -boot-info-table -R -J -v -T \
        -eltorito-alt-boot -e images/efiboot.img \
        $DESTINATION_DIR

it tells me:
Size of boot image is 4 sectors -> No emulation
Size of boot image is 17408 sectors -> genisoimage: Error - boot image
'images/efiboot.img' has not an allowable size.

This is the exact same file that is on the Everything ISO image.

What am I missing ?  I also want to make the ISO boot with UEFI. I think I
have the right parameters but getting this error. Thoughts?

Thanks,

Jerry

On Tue, 5 May 2020 22:40, Jerry Geis wrote:
>
> Hi All,
>
> I am trying to make a customer ISO. When I run this command:
> mkisofs -o $DESTINATION_FILE -b isolinux/isolinux.bin -c boot.cat \
>        -no-emul-boot -boot-info-table \
>        -V "$NAME" -boot-load-size 4 -boot-info-table -R -J -v -T
\
>        -eltorito-alt-boot -e images/efiboot.img \
>        $DESTINATION_DIR
>
> it tells me:
> Size of boot image is 4 sectors -> No emulation
> Size of boot image is 17408 sectors -> genisoimage: Error - boot image
> 'images/efiboot.img' has not an allowable size.
>
> This is the exact same file that is on the Everything ISO image.
>
> What am I missing ?  I also want to make the ISO boot with UEFI. I think I
> have the right parameters but getting this error. Thoughts?
Only one thing jumps out to me (no expert at all):
  Your parameter at call:
   -boot-load-size 4
  Collides with the boot image size of 17408 sectors of
  the images/efiboot.img file

I would recommend to try with:
  -boot-load-size 17408
  (or even greater)

Have a good day,
  - Yamaban

Thanks for hint. I have changed to this:

genisoimage \
        -v \
        -J -R \
        -V "$NAME" \
        -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 \
        -boot-info-table -eltorito-alt-boot -b images/efiboot.img
-no-emul-boot -boot-load-size 18755 \
        -o $DESTINATION_FILE .
it now creates the ISO and is EFI bootable.

However - I have a different issue arise.   In normal install or EFI
install (both) it hangs at "Starting dracut initqueue hook..."

Only thing I am changing is the add the boot options for my kickstart
file.  So then I tried select the "standard" "Install CentOS
7" and it does
the same thing, hangs at "Starting dracut".

Any thoughts on that ?
I am testing with virt-manager.

Thanks,

Jerry

What is the \x207  ??
and the \x20  ??
on this line ?
inst.stage2=hd:LABEL=CentOS\x207\x20x86_64

Jerry