Syslinux - Apr 2005 - Creating a bootable FS thats larger than 2880?

I've been attempting to create a bootable image thats double the size of the
2880 floppy disk.  I can do the following to create a image that will boot with
memdisk but i cant seam to get it to work with a larger size.

What works...
       dd if=/dev/zero of=floppy288.img bs=1024 count=2880
       mkdosfs floppy288.img
       ms-sys -1 -f floppy288.img
       mount -o loop floppy288.img /mnt
       cp msdos.sys /mnt/
       cp io.sys /mnt/
       cp command.com /mnt/

I then boot that using PXE and it works fine.  The problem comes when i try to
grow the image
    dd if=/dev/zero of=floppy288.img bs=1024 count=5760
    mkdosfs floppy288.img
    ms-sys -1 -f floppy288.img
    mount -o loop floppy288.img /mnt
    cp msdos.sys /mnt/
    cp io.sys /mnt/
    cp command.com /mnt/


I'm basically following the instructions/example from ms-sys above.

I'm sure i'm just doing somthing stupid, i know that memdisk assumes
that images larger than 2880 are a harddisk and i even tryed passing the floppy
param (whch it did say floppy and not harddisk) but i continue to get errors
when trying to boot.

Basically what i'm trying to do is create a bootable msdos fs so i can load
Symantic Ghost.  Ghost8 is now just a hair larger than 2880 and if i have to
load any extra nic drivers it's even larger.

---
Shaun

When you enlarge the size you need to pass geometry parameters to 
memdisk and tell it to interpret the image as a floppy image with given 
geometry.

http://people.cs.uchicago.edu/~gmurali/gui/downloads.html has a script 
which increases the size of a bootable image and also outputs the 
geometry which needs to be passwed to memdisk.

- Murali

Shaun Reitan wrote:
>I've been attempting to create a bootable image thats double the size of
the 2880 floppy disk.  I can do the following to create a image that will boot
with memdisk but i cant seam to get it to work with a larger size.
>
>What works...
>       dd if=/dev/zero of=floppy288.img bs=1024 count=2880
>       mkdosfs floppy288.img
>       ms-sys -1 -f floppy288.img
>       mount -o loop floppy288.img /mnt
>       cp msdos.sys /mnt/
>       cp io.sys /mnt/
>       cp command.com /mnt/
>
>I then boot that using PXE and it works fine.  The problem comes when i try
to grow the image
>    dd if=/dev/zero of=floppy288.img bs=1024 count=5760
>    mkdosfs floppy288.img
>    ms-sys -1 -f floppy288.img
>    mount -o loop floppy288.img /mnt
>    cp msdos.sys /mnt/
>    cp io.sys /mnt/
>    cp command.com /mnt/
>
>
>I'm basically following the instructions/example from ms-sys above.
>
>I'm sure i'm just doing somthing stupid, i know that memdisk assumes
that images larger than 2880 are a harddisk and i even tryed passing the floppy
param (whch it did say floppy and not harddisk) but i continue to get errors
when trying to boot.
>
>Basically what i'm trying to do is create a bootable msdos fs so i can
load Symantic Ghost.  Ghost8 is now just a hair larger than 2880 and if i have
to load any extra nic drivers it's even larger.
>
>---
>Shaun
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