Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 13 Feb 2002 13:30:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 13 Feb 2002 13:30:21 -0500 Received: from mailer3.bham.ac.uk ([147.188.128.54]:38582 "EHLO mailer3.bham.ac.uk") by vger.kernel.org with ESMTP id ; Wed, 13 Feb 2002 13:30:00 -0500 Date: Wed, 13 Feb 2002 18:30:01 +0000 (GMT) From: Mark Cooke X-X-Sender: mpc@pc24.sr.bham.ac.uk To: Alan Cox cc: linux-kernel@vger.kernel.org Subject: Re: Quick question on Software RAID support. In-Reply-To: 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 Hi Alan, Just a note that I have almost exactly the setup you outlined on a KT7A-RAID, HPT370 onboard. I have a single disk on each highpoint chain, and a 3rd (parity) on one of the onboard 686B channels. I have been seeing odd corruptions since I setup the system as RAID-5 though. Have you seen any reports of 686B ide corruption recently (or RAID-5 for that matter) ? kernel 2.4.18pre6... just compiling pre9-ac3... Athlon MP 1500+, mem=nopentium apm=off, NvAGP=0 in X-setup. Mark On Wed, 13 Feb 2002, Alan Cox wrote: > Date: Wed, 13 Feb 2002 11:15:54 +0000 (GMT) > From: Alan Cox > To: Marco Colombo > Cc: Alan Cox , linux-kernel@vger.kernel.org > Subject: Re: Quick question on Software RAID support. > > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > Is it supposed to detect a failed disk and *stop* using it? > > Yes, it will stop using it and if appropriate try and do a rebuild > > > I had a raid1 IDE system, and it was continuosly raising hard errors on > > hdc (the disk was dead, non just some bad blocks): the net result was that > > it was unusable - too slow, too busy on IDE errors (a lot of them - even > > syslog wasn't happy). > > Don't try and do "hot pluggable" IDE raid it really doesn't work out. With > scsi the impact of a sulking drive is minimal unless you get unlucky > (I have here a failed SCSI SCA drive that hangs the entire bus merely by > being present - I use it to terrify HA people 8)) > > > BTW, given a 2 disks IDE raid1 setup (hda / hdc), does it pay to put a > > third disk in (say hdb) and configure it as "spare disk"? I've got > > concerns about the slave not actually beeing able to operate if the > > master (hda) fails badly. > > Well placed concerns. I don't know what Andre thinks but IMHO spend the > extra $20 to put an extra highpoint controller in the machine for the third > IDE bus. > > Alan > - > 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/ > -- +-------------------------------------------------------------------------+ Mark Cooke The views expressed above are mine and are not Systems Programmer necessarily representative of university policy University Of Birmingham URL: http://www.sr.bham.ac.uk/~mpc/ +-------------------------------------------------------------------------+ - 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/