Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!sun-barr!ames!pacbell!att!mcdchg!ddsw1!karl
From: karl@ddsw1.MCS.COM (Karl Denninger)
Newsgroups: comp.unix.xenix
Subject: Re: Disk duplexing w/SCO Unix/Xenix
Summary: The DPT disk controller will do this for you
Keywords: fault tolerance, disk
Message-ID: <1989Jul16.181435.4440@ddsw1.MCS.COM>
Date: 16 Jul 89 18:14:35 GMT
References: <14@aostul.UUCP>
Reply-To: karl@ddsw1.MCS.COM (Karl Denninger)
Organization: Macro Computer Solutions, Inc., Mundelein, IL
Lines: 23

In article <14@aostul.UUCP> steveb@aostul.UUCP (Steve Bogner) writes:
>
>We have a large (potential) customer that wants an SCO Unix system
>that is "fault tolerant" (in the Novell LAN sense).  This would
>include "disk mirroring" or "disk duplexing" where a second hard disk
>is maintained as an exact image of the primary disk.  The reasoning
>goes that if the primary disk goes bad, they can automatically run off
>the second disk without any difficulty.  Does anyone know if there is
>such an animal?  

Get the DPT disk controller and forget about it.

They can do on-board shadowing, removing the operating system from the loop
entirely -- and they cache disk accesses as well!

Nice board, even if a little expensive.  (but for unbelievably fast
performance, I'll pay their price)

--
Karl Denninger (karl@ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
Public Access Data Line: [+1 312 566-8911], Voice: [+1 312 566-8910]
Macro Computer Solutions, Inc.		"Quality Solutions at a Fair Price"