Date: Tue, 11 Sep 2001 09:05:18 +1000 From: Greg Lehey <grog@lemis.com> To: john_wilson100@excite.com Cc: freebsd-hackers@FreeBSD.org, sos@FreeBSD.org Subject: Re: HPT370 RAID or Vinum? Message-ID: <20010911090518.G733@canberra.worldwide.lemis.com> In-Reply-To: <8846549.1000141895110.JavaMail.imail@roary.excite.com>; from john_wilson100@excite.com on Mon, Sep 10, 2001 at 10:11:28AM -0700 References: <8846549.1000141895110.JavaMail.imail@roary.excite.com>
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On Monday, 10 September 2001 at 10:11:28 -0700, john_wilson100@excite.com wrote: > Hi there, > > I am trying to install FreeBSD on a (pseudo-) hardware ATA RAID volume which > consists of two striped ATA disks connected to a Highpoint HPT370 > controller. "Pseudo-" because FreeBSD detects the individual disks > (ad4/ad6) as well as the striped volume (ar0). > > Besides the fact that ar0 isn't documented anywhere (except in /dev/MAKEDEV) > and "man 4 ar" gives something completely irrelevant, which one is better to > use: > > Highpoint built-in RAID (ar0), or ad4/ad6 striped with Vinum? > > 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. 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. Greg -- Finger grog@lemis.com for PGP public key 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
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