From owner-freebsd-questions@FreeBSD.ORG Thu Nov 22 20:56:51 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 31D1A16A421 for ; Thu, 22 Nov 2007 20:56:51 +0000 (UTC) (envelope-from wmoran@potentialtech.com) Received: from mail.potentialtech.com (internet.potentialtech.com [66.167.251.6]) by mx1.freebsd.org (Postfix) with ESMTP id 14F8213C4F3 for ; Thu, 22 Nov 2007 20:56:50 +0000 (UTC) (envelope-from wmoran@potentialtech.com) Received: from working (c-71-60-127-199.hsd1.pa.comcast.net [71.60.127.199]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.potentialtech.com (Postfix) with ESMTP id ECAEBEBC3B; Thu, 22 Nov 2007 15:56:43 -0500 (EST) Date: Thu, 22 Nov 2007 15:56:40 -0500 From: Bill Moran To: "Jan Catrysse" Message-Id: <20071122155640.fa7e0536.wmoran@potentialtech.com> In-Reply-To: References: X-Mailer: Sylpheed 2.4.7 (GTK+ 2.12.1; i386-portbld-freebsd6.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: RAID1 synchronisation - howto OR not necessary? 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: Thu, 22 Nov 2007 20:56:51 -0000 "Jan Catrysse" wrote: > > Dear subscribers, > > I am currently running a production server: > FreeBSD 6.2 STABLE > Onboard Intel ICH8R Raid 1 with 2x SATA300 500GB HDD > Using ATA for Raid1 > > On Windows systems it is an absolute must to do a Raid Synchronisation > every once and a while to maintain data consistency. Wow. Any RAID controller with that requirement is junk. Where did you get the information from that you had to synchronize? Does it say so in the manual? Does it actually say "every once and a while" or does it give a specific schedule. I suspect that you have wrong information ... but if your information is correct, I'd get a refund on that RAID controller. > I am some what disturbed that that kind of command / tool seems not > available on FreeBSD. There is not, because such a thing should not be necessary. > Are there other methods to do the synchronisation? > 1) Maybe atacontrol detach & atacontrol addspare & atacontrol rebuild? > 2) Maybe data consistency is always maintained automatically by the > driver? > 3) Maybe I have to panic and urgently make backups? If resyncing your raid on a regular basis is truly a requirement, I'd do #3 at least, followed by getting my money back. -- Bill Moran http://www.potentialtech.com