Yes - its the name of the paging device for the system.   It allowed
interleaved paging across multiple disk drives, so you could see and
indirect look driver to multiple drives.   It should be in section 4 of the
BSD manual
ᐧ

On Fri, Apr 20, 2018 at 11:02 AM, Tim Bradshaw <tfb at tfeb.org> wrote:

> I am sure I remember a machine which had this (which would have been
> running a BSD 4.2 port).  Is my memory right, and what was it for
> (something related to swap?)?
>
> It is stupidly hard to search for (or, alternatively, there are just no
> hits and the memory is false).
>
> --tim
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