Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!texbell!vector!holston!barton
From: barton@holston.UUCP (Barton A. Fisk)
Newsgroups: comp.unix.xenix
Subject: Re: disk mirroring under SCO UNIX
Summary: Compaq Systempro does it
Keywords: disk mirorring
Message-ID: <5728@holston.UUCP>
Date: 15 Jun 90 15:06:32 GMT
References: <787@netmbx.UUCP> <9993@gopnbg.gopas.sub.org>
Distribution: comp
Organization: Barton A. Fisk & Co.
Lines: 28

In article <9993@gopnbg.gopas.sub.org>, micha@gopnbg.gopas.sub.org (Michael Killermann) writes:
> In article <787@netmbx.UUCP> jack@netmbx.UUCP (Jack Murawski) writes:
> >I use in my company a NOVELL Network with disk mirorring in file server.
> >It is very comfortable not to must to do the backup of the server
> >every day and to by sure that the data is secure. 
> >Is there any disk mirroring software for SCO UNIX 3.2 or for ODT on
> >the market.
> 
> I know only a hardware-solution.
> 
> You must use the DPT-Harddisk-Controller with the (Hardware)-Caching-Option.
> 
Not if you have a Compaq Systempro. There are several options available
when configuring the hard drive array. One is mirroring, where for example
2 drives in a 4 drive array are allocated for mirroring. Another is data-
guarding, where one drive in a 4 driva array or 2 drives in an 8 drive
array are allocated for Compressed encrypted backup of data on the other
drives in the array. The third is controller duplexing, where a second
controller with its own drive array is installed for a completely fault
tolerent (pretty close) drive subsystem. The standard 4 drive array is
840MB the 8 drive array is double that.

Although I've studied this system, I have not actually used one under
Unix and would welcome any comments or corrections from actual users.

Bart Fisk
-- 
uucp: holston!barton