mount floppy/cdrom on diskless PC: "vfsload: Exec format error"

[Rob]

Rob wrote:
> 
> 
> Hi,
> 
> I have a diskless PC with a floppy and CDrom drive.
> I can create a dos floppy without a problem, but the mount fails:
> 
>   # /usr/sbin/fdformat /dev/fd0.1440
>   Format 1440K floppy `/dev/fd0.1440'? (y/n): y
>   Processing VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV done.
>   # /sbin/disklabel -B -r -w /dev/fd0 fd1440
>   # /sbin/newfs_msdos /dev/fd0
>   /dev/fd0: 2840 sectors in 355 FAT12 clusters (4096 bytes/cluster)
>   bps=512 spc=8 res=1 nft=2 rde=512 sec=2880 mid=0xf0 spf=2 spt=18 hds=2 
> hid=0
>   # mount_msdos /dev/fd0c /mnt
>   mount_msdos: vfsload(msdos): Exec format error
> 
> 
> Same problem occurs for a CDrom:
> 
>   # mount -t cd9660 /dev/acd0c /cdrom
>   cd9660: vfsload(cd9660): Exec format error
> 
> The diskless machine has:
>   /modules/msdos.ko
>   /modules/cd9660.ko
> 
> Probably related to this are these lines in /var/log/messages:
>   Mar  6 13:09:33 diskless //kernel: link_elf: symbol s_lock_init undefined
> 
> 
> Any ideas what's going wrong here?

I'll answer my own question here:

When I add two options to the KERNEL config file:
   options         MSDOSFS
   options         CD9660
and use that kernel for my diskless PC, I can mount
floppy and CDrom.

Strange, because usually this is not needed for casual
mounts of these devices.

Cheers,
Rob.