Path: utzoo!attcan!uunet!mcvax!unido!uklirb!kirchner
From: kirchner@uklirb.UUCP (Reinhard Kirchner)
Newsgroups: comp.arch
Subject: Why no disks with two HDAs ?
Keywords: diskdrives, headdiskassemblies
Message-ID: <2351@uklirb.UUCP>
Date: 16 Jun 88 08:01:36 GMT
Organization: University of Kaiserslautern, W-Germany
Lines: 12


Hello,
recently I once again learned about IBM disk drives which have two
head-mechanisms ( Head-Disk-Assemblies , HDA ) per spindle.
They have several drives of this kind, including the big 3380.

Now:
- why doesn't anybody else produce drives with two HDAs ?
  ( or does somebody whom I do not know ?, and then why ? )
. Is it not worth the effort, patented by IBM, or what is the reason ?

R. Kirchner