Invalid fdisk partition table found (fwd)

[Fbsd8]

Robert wrote:
> 
> Ideally, I would
> like to change these cards to FAT32 but I cannot get there with fdisk
> and am not sure how to get there with gpart or if I can.
> 

You can get a small script that erases the primary GPT table
from the front of the HD and the secondary GPT table from the end of the HD.

   http://wiki.freenas.org/faq:0129

Then follow instructions found here.

  http://forums.freebsd.org/showthread.php?t=13780

This will leave you with fat32 format on your md cards. Then insert into 
ms/windows system and use windows explorer to select the drive letter of 
the md card, right mouse click for pull down menu, select format to 
reformat for ntfs format.