🚀 go-pugleaf

In <1jhn42INNfma@news.cerf.net> cmd@nic.cerf.net (Jeff Blaalid) writes:

]I am writing a block device driver for hard disks, and am having
]trouble figuring out how to tell DOS when a disk is unformatted.
]Normally, if you try to access an unformatted disk, you get the
]"Invalid media type" error from command.com.

]I have tried returning "Invalid media" from the media check command,
]but that causes the "Invalid media type" error to happen when you
]start fdisk.  Putting an invalid media descriptor in the BPB returned
]from Build BPB doesn't help, either, because DOS seems to ignore it.
]There just doesn't seem to be any documentation on how a device driver
]is supposed to tell DOS that a disk is unformatted.

]Thanks in advance to any kind souls who have a solution.

]Sam Lin

If there is a valid fat + root-directory , it's formatted otherwise
not. This are the two things missing after low-level format and
partitioning.

	- Ralf