Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!orstcs!statware!scf
From: scf@statware.UUCP ( Steve Fullerton)
Newsgroups: comp.unix.sysv386
Subject: Re: DPT controller?
Keywords: DPT disk controller
Message-ID: <11571@statware.UUCP>
Date: 19 May 91 22:19:45 GMT
References: <1991May14.235110.18644@tous.uucp> <1991May17.131717.26942@virtech.uucp> <31@metran.UUCP>
Reply-To: scf@statware.UUCP ( Steve Fullerton)
Distribution: na
Organization: Statware, Corvallis, Oregon
Lines: 26

In article <31@metran.UUCP> jay@metran.UUCP (Jay Ts) writes:
>In article <1991May17.131717.26942@virtech.uucp>, cpcahil@virtech.uucp (Conor P. Cahill) writes:
>... [extra deleted]
>I have been wondering under what conditions the DPT and other caching disk
>controllers are really effective enough to be worth the extra price and
>administration complexities...
>... [extra deleted]
>Any comments?  I would like to hear from those who have direct experience
>with the DPT or other caching controller, and have been able to compare
>against similar systems with no caching controller...

I talked with a DPT representative at the Uniforum show in Dallas and
asked him what type of performance increase I would get from tossing out
my WD1007SE2 and getting a DPT controller for our 2 ESDI 760 MB Toshiba
disks.  We are running SCO UNIX 3.2 V2 with 32MB of memory and are trying
to improve our database performance.  He told me that switching to the DPT
controller wouldn't result in a significant improvement.  I didn't ask for
any details, but thanked him for his honesty.

Sorry, no hard numbers, but I hope this helps.

-- 
Steve Fullerton                        Statware, Inc.
scf%statware.uucp@cs.orst.edu          260 SW Madison Ave, Suite 109
orstcs!statware!scf                    Corvallis, OR  97333
                                       503/753-5382