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From: se@MI.Uni-Koeln.DE (Stefan Esser)
Newsgroups: comp.periphs.scsi,comp.os.linux.hardware,comp.unix.bsd.freebsd.misc,comp.os.linux.setup
Subject: Re: SCSI PCI host adapter
Date: 28 Aug 1995 20:23:37 GMT
Organization: Institute for Mathematics, University of Cologne, Germany
Lines: 39
Message-ID: <41t8k9$p3m@news.rrz.uni-koeln.de>
References: <418r3m$9c6@trauma.rn.com> <419963$hst@gate.sinica.edu.tw> <41eadg$1ajc@news.mindspring.com> <41rqk7$2oj@mailhub.hcl.com>
NNTP-Posting-Host: sysiphos.mi.uni-koeln.de
To: rudy@hcl.com (Rudy Amid)
Xref: euryale.cc.adfa.oz.au comp.periphs.scsi:36056 comp.os.linux.hardware:13924 comp.unix.bsd.freebsd.misc:4942 comp.os.linux.setup:17810
In article <41rqk7$2oj@mailhub.hcl.com>, Rudy Amid <rudy@hcl.com> writes:
|> How does the NCR controller compares to the Adaptec AHA2940 PCI controller?
|> The price difference is one, but what about performance?
The NCR seems to be no slower than the Adaptec,
but I didn't get reliable Adaptec performance
results under FreeBSD ...
The NCR keeps up with any current drive easily,
and with two drives you'll see some 8MB/s total
throughput through the file system (as reported
by 'Bonnie').
There is a benchmark comparing Sun, DEC and PC
machines, and the total throughput achieved on
a Pentium with 3 NCR controllers and five disk
drives was >22MB/s ... (see
http://www-itg.lbl.gov/ISS/performance.ps
and
http://www.geli.com/data/disk.perf.html
for reference).
According to the data I know about, the NCR is
at least faster than the BusLogic BT946C.
If anybody has access to both an AH2940 and an
NCR and can run Bonnie using the same drive on
each controller, I would be most interested in
the results ...
--
Stefan Esser, Zentrum fuer Paralleles Rechnen Tel: +49 221 4706021
Universitaet zu Koeln, Weyertal 80, 50931 Koeln FAX: +49 221 4705160
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http://www.zpr.uni-koeln.de/staff/esser/esser.html <se@ZPR.Uni-Koeln.DE>