Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 15 Mar 2002 11:53:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 15 Mar 2002 11:53:00 -0500 Received: from Expansa.sns.it ([192.167.206.189]:62980 "EHLO Expansa.sns.it") by vger.kernel.org with ESMTP id ; Fri, 15 Mar 2002 11:52:44 -0500 Date: Fri, 15 Mar 2002 17:52:47 +0100 (CET) From: Luigi Genoni To: Thunder from the hill cc: linux-kernel@vger.kernel.org, Martin Eriksson Subject: Re: HPT370 RAID-1 or Software RAID-1, what's "best"? In-Reply-To: <3C920ABB.6E17E324@ngforever.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 15 Mar 2002, Thunder from the hill wrote: > Hi, > > Luigi Genoni wrote: > > HPT370 IDE Raid is not really an hardware raid. > > It is a software Raid, since Linux does not use tha raid implementation > > that comes with the BIOS, but it uses softwareraid. > That doesn't prevent me from saying that real hardware raid might be > better. But is the thing you wish to say that there's no difference, or > what? Hardware RAID is indeed better, but what you get using HPT370 IDE controlelr is not hardware raid at all. Just read the code of the driver. You get a software raid, period. > > Alan Cox wrote: > > The raid rebuild time is identical for pretty much any set up. With the > > softraid its intentionally defaulting to a low fraction of I/O bandwidth > > so it doesnt disrupt normal operation. > I experienced it took at about twice the time for a rebuild. I don't > exactly remember the test results, and they aren't available to me until > Monday. If you're interested... > Maybe things have changed a lot since last year, when I did the tests. > > > Also as far is his question goes - both are software raid > See above. > > Thunder > -- > begin-base64 755 - > IyEgL3Vzci9iaW4vcGVybApteSAgICAgJHNheWluZyA9CSMgVGhlIHNjcmlw > dCBvbiB0aGUgbGVmdCBpcyB0aGUgcHJvb2YKIk5lbmEgaXN0IGVpbiIgLgkj > IHRoYXQgaXQgaXNuJ3QgYWxsIHRoZSB3YXkgaXQgc2VlbXMKIiB2ZXJhbHRl > dGVyICIgLgkjIHRvIGJlIChlc3BlY2lhbGx5IG5vdCB3aXRoIG1lKQoiTkRX > LVN0YXIuXG4iICA7CiRzYXlpbmcgPX4Kcy9ORFctU3Rhci9rYW5uXAogdW5z > IHJldHRlbi9nICA7CiRzYXlpbmcgICAgICAgPX4Kcy92ZXJhbHRldGVyL2Rp > XAplIExpZWJlL2c7CiRzYXlpbmcgPX5zL2Vpbi8KbnVyL2c7JHNheWluZyA9 > fgpzL2lzdC9zYWd0LC9nICA7CiRzYXlpbmc9fnMvXG4vL2cKO3ByaW50Zigk > c2F5aW5nKQo7cHJpbnRmKCJcbiIpOwo= > ==== > Extract this and see what will happen if you execute my > signature. Just save it to file and do a > > uudecode $file | perl > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/