[rescue] s/390 primary/secondary, multi-level, real/extended, swap, etc.

[Julius Sridhar]

On Wed, 6 Feb 2002, Greg A. Woods wrote:

> > > > > How did you manage to afford such a machine for yourself?
> > > >
> > > > I got it from an idiot who thought because it's big, it has to be old.  I
> > > > paid $2000 for it.
> > > >
> > > > > Also, I'm assuming that the 16GB is ram, and you say the 6TB is disk.  What
> > > > > exactly is the 128GB then?
> > > >
> > > > Multi-level RAM.
> > >
> > > Real and Extended is what the system calls it.
> >
> > Actually, it depends on the OS.
>
> Yeah -- I suspect under Unix it would be called "swap".
>
> I dunno about the S/390, but older IBM mainframes often had not just
> completely separate paging devices, but they were often even of quite
> different design (and well they should be -- the job of paging virtual
> memory is quite different from that of supporting a random-access
> filesystem of most any kind).

This is actual random-access memory.  Page/swap to DASD is different.

Peace...  Sridhar