otherwise to will be formated with OFS. And that's what has happened to your HD.
No, definitely not. OFS cannot handle partitions larger than 8MB. With Kickstart 2.0+ the FastFileSystem is in the ROM, so it is not needed on the disk.
I cannot say why AR does not recognise the HDD, probably because it is too old or too hacky.
The FastFileSystem file is on the Install disk (the same disk HDToolbox is on) in the L directory. You can install it using the Add/Update button in HDToolbox. If you boot from the Install disk, it finds it in the default location. If you start HDToolbox from the installed HDD it should find it either.
Bye,
Thomas