newfs parameters for wren runner

[Robert Prohaska]

What are the appropriate parameters for newfs when setting up a
seagate ST4385NM (wren runner) disk?  The partition is about 250 Mbytes,
slice 3.

While were're at it, what's the difference between /dev/dsk/c6d0s3 (the
partition I want to use) and /dev/rdsk/c6d0s3?

thanks

bob