fdisk: Class not found with (Extended DOS (LBA)) slice

[Seeker]

I am trying to edit slice 2 size with fdisk:

2: sysid 15 (0x0f),(Extended DOS (LBA))

It holds win D: and E: drives

After I came to this part and answered yes:

Should we write new partition table? [n] y
fdisk: Class not found
fdisk: Failed to write sector zero

What is a problem here?

I use 8.0-STABLE

 

[Seeker]

God dammit! Why no one is helping me?!

Anyway..., fdisk is being used on a "live" filesystem, so that is a reason for

fdisk: Failed to write sector zero

and has been fixed by:

# sysctl kern.geom.debugflags=16

Furthermore, this error stayed:

fdisk: class not found

and can be ignored, as I successfully used fidsk.

Transition(geom_*) is in progress, so until fdisk and bsdlabel got fixed one can use gpart(8) instead.
Which I didn't.