From owner-freebsd-hackers Sat Nov 10 2: 7: 0 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from sydney.worldwide.lemis.com (dhcp243.rocks.bsdconeurope.org [195.40.100.243]) by hub.freebsd.org (Postfix) with ESMTP id CDB4537B416; Sat, 10 Nov 2001 02:06:53 -0800 (PST) Received: (from grog@localhost) by sydney.worldwide.lemis.com (8.11.6/8.9.3) id fA741ZV00379; Wed, 7 Nov 2001 04:01:35 GMT (envelope-from grog) Date: Wed, 7 Nov 2001 04:01:35 +0000 From: Greg Lehey To: =?iso-8859-1?Q?S=F8ren_Schmidt?= Cc: john_wilson100@excite.com, freebsd-hackers@FreeBSD.org, sos@FreeBSD.org Subject: Re: HPT370 RAID or Vinum? Message-ID: <20011107040135.E339@sydney.worldwide.lemis.com> References: <20010911090518.G733@canberra.worldwide.lemis.com> <200109110541.f8B5fAC10992@freebsd.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.2.5i In-Reply-To: <200109110541.f8B5fAC10992@freebsd.dk>; from sos@freebsd.dk on Tue, Sep 11, 2001 at 07:41:06AM +0200 Organization: The FreeBSD Project Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.FreeBSD.org/ X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tuesday, 11 September 2001 at 7:41:06 +0200, Søren Schmidt wrote: > It seems Greg Lehey wrote: >>> I reckon if the RAID functions are implemented in HPT BIOS (in software), >>> I'll be better off with Vinum. >> >> Ultimately, all RAID is software RAID. The issue is just how it's >> implemented. > > Exactly. > >> I'd guess that the HPT will give you far worse performance than Vinum, >> though I'd be very interested to see confirmation or denial of this >> guess. If you feel like benchmarking, contact me first. > > And why is that ? for RAID's with the same parameters, I'd expect them > to perform equal, maybe with a sligtht advantage to the ATA driver since it > saves a few cycles by being tighter integrated. Agreed. I don't think the RAIDs will have the same parameters. Most of these cheap controllers have fairly simplistic algorithms. Note that I said "guess", though. In my language, that means "don't know for sure". I'd really like to see some objective benchmarks. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message