[syslinux] [PATCH] isohybrid: user options

Thomas Schmitt scdbackup at gmx.net
Sat May 16 04:58:05 PDT 2009


Hi,

Geert Stappers wrote:
> So my conclusion is that
> there are at least three user parameters for isohybrid
>  "partition number"
>  "fstype"
>  "geometry"

I assume "geometry" is this in isohybrid.in

  # Use this fake geometry (zipdrive-style...)
  $h = 64; $s = 32;

It would influence
  $psize   = $c*$h*$s;
  $ehead   = $h-1;
  $esect   = $s + ((($cc-1) & 0x300) >> 2);
  $ecyl    = ($cc-1) & 0xff;

Again my non-expert questions:
- Can it do harm ?
  (What parameter combinations are ok ?)
- What is it good for ?
  (How to describe this in libisofs API and in
   xorriso man page ?)
- Does it influence the need for 1 MB image
  size alignment  ?


Have a nice day :)

Thomas




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