From: David Williams <dlw(a)trailingedge.com>
On 2 Jul 2000, at 16:09, Chuck McManis wrote:
  tapes and disks used different protocols (TMSCP vs
MSCP). A Viking QTD
 from a DEC Reseller will set you back anywhere from $250 - $800. A
 nicer CMD controller like the one Allison recommended I've seen listed
 for $2000! Contrast that to an ESDI controller that you can usually
 find for $30 - $50. 
Wow!  Ok, I really want to run VMS but not $2000 enough.  Well I
sometimes have some pretty good luck, maybe I'll find one
If you don't your not looking.  I got mine for free.  The 2000 number
is obviously a price for a new part.
don't forget there is also EDSI and the DEC RQDX3.  Of those two
the RQDX3 is generally very cheap and usually free.  Drives can
be a problem as the RD54s are the hot item, but they are found.
Allison