On Fri, 11 Feb 2000, Sanjay Lal wrote: 

> I am trying to figure out how I'd go about using
> a ramdisk (device md) as my root file system.
> I have looked at the GENERIC_MD config file.  This
> does allow you to setup device md (memory disk) as
> the root fs.  There is an array in md_root.c that
> needs to be "patched" so that it contains the image
> of an fs.  My question(s) are:
> 
> (1) Where do u get or how do u create an image suitable
> for patching into the array. I am assuming here
> that we could create an fs of the same size, and then
> dd it off to a file????

Close. You use the vnd device to make a device which is backed by a file.
You then newfs it and build the fs you want.

> (2) How do you patch the array.

mdsetimage.

Check out the distrib section of the source tree. It's where ramdisk'd
floppies are built.

Take care,

Bill