From owner-freebsd-questions@FreeBSD.ORG Fri Jun 23 08:46:18 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D4F7D16A47B for ; Fri, 23 Jun 2006 08:46:18 +0000 (UTC) (envelope-from philippe.lang@attiksystem.ch) Received: from mail.attiksystem.ch (f29.attiksystem.ch [212.147.59.29]) by mx1.FreeBSD.org (Postfix) with ESMTP id 25B8D43D58 for ; Fri, 23 Jun 2006 08:46:17 +0000 (GMT) (envelope-from philippe.lang@attiksystem.ch) Received: from poweredge.attiksystem.ch (poweredge.attiksystem.ch [10.0.0.29]) by mail.attiksystem.ch (8.12.11/8.12.11) with ESMTP id k5N8kDpW029441; Fri, 23 Jun 2006 10:46:13 +0200 (CEST) (envelope-from philippe.lang@attiksystem.ch) Content-class: urn:content-classes:message MIME-Version: 1.0 Date: Fri, 23 Jun 2006 10:46:13 +0200 Content-Type: multipart/signed; boundary="----=_NextPart_000_001D_01C696B2.3CB444F0"; micalg=SHA1; protocol="application/x-pkcs7-signature" X-MimeOLE: Produced By Microsoft Exchange V6.0.6603.0 Message-ID: <6C0CF58A187DA5479245E0830AF84F421D0E59@poweredge.attiksystem.ch> X-MS-Has-Attach: yes X-MS-TNEF-Correlator: Thread-Topic: ICH5R, ICH7R or Promise PDC20378 RAID? Thread-Index: AcaWnVaqnnhXgeMcS2KP4a+aI0kgAAAAbgnw From: "Philippe Lang" To: "Ted Mittelstaedt" , "Doug Poland" X-Spam-Score: -1.44 () ALL_TRUSTED X-Scanned-By: MIMEDefang 2.49 on 10.0.0.111 Cc: freebsd-questions Subject: RE: ICH5R, ICH7R or Promise PDC20378 RAID? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Jun 2006 08:46:18 -0000 This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C696B2.3CB444F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Ted Mittelstaedt wrote: >> Hi, >> >> I'm sure there are solutions to make things work, but personnaly, I >> don't feel confortable with a RAID system that acts that way, and >> that is supposed to make the whole system more robust and >> problem-free. > > Your missing the point. > > If a disk crashes it wipes the metafile off the disk. > > If you want to simulate a disk crash, issue a raid detach command > first, then pull the disk. > > The ata raid in the ata driver isn't written to handle the > condition of > a disk being pulled that has nothing wrong with it then reinserted. > It is written to handle the condition of a disk crashing, then being > pulled, then a new one replaced. > >> I used to play with hardware SCSI RAID controllers, and was never >> able to trash the system. > > I have SCSI raid controllers too that I can do that with. But keep in > mind that these controllers firmware is written to if a disk > is pulled then > replaced, it immediately assumes that the disk is toast, and > rebuilds it > from scratch. Hi, I'm not an expert in RAID Ted, and I don't want to be. Simply, in situations where a disk crashes, and the server is not redundant anymore, I prefer having a controller that I can rely on, both eyes closed. I have just installed the 3WARE controller this morning, and did the exact same operations I did with the ICH5/7R and onboard Promise controller of my ASUS boards. It's simply not comparable at all, and for a really affordable price. The server did not crash, and is by the way rebuilding the RAID at the moment... Despite all my efforts, I was not able to trash it. A 3WARE controller is really worth the investment, really. 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