initialize msdosfs on memory stick?

[Gary Aitken]

On 09/12/13 17:52, Warren Block wrote:
> On Thu, 12 Sep 2013, Gary Aitken wrote:
> 
>> I can't seem to find how to do this in the handbook or man pages. I
>> need to initialize a usb memory stick with an msdos file system. Is
>> it possible, or do I have to find a windoze system?
> 
> Sure, it's possible.  For maximum compatibility, I'd suggest creating
> an MBR layout on it.  Some devices expect that.  Assuming it is da0
> (make sure) and that everything on it has been backed up...
> 
> # gpart destroy -F da0 
> # gpart create -s mbr da0 
> # gpart add -t \!12 da0 
> # newfs_msdos -F32 /dev/da0s1 

That worked, thanks.

Where is the magic file type !12 described?
I don't see it as one of the possibilities in man gpart.