From owner-freebsd-questions@FreeBSD.ORG Mon Jun 16 14:19:20 2008 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 BD5E51065672 for ; Mon, 16 Jun 2008 14:19:20 +0000 (UTC) (envelope-from z.szalbot@lc-words.com) Received: from relay.lc-words.com (relay.lc-words.com [62.121.130.110]) by mx1.freebsd.org (Postfix) with ESMTP id 6BCCA8FC20 for ; Mon, 16 Jun 2008 14:19:20 +0000 (UTC) (envelope-from z.szalbot@lc-words.com) Received: from localhost (localhost [127.0.0.1]) by relay.lc-words.com (Postfix) with ESMTP id BE120C946A; Mon, 16 Jun 2008 16:18:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lc-words.com; s=mainlcwords; t=1213625896; bh=b+PArJ/Xv0mMuVihLT9YREamoLs3mlmLvxl hOv6h8G0=; h=Message-ID:Date:From:Reply-To:MIME-Version:To:CC: Subject:References:In-Reply-To:Content-Type: Content-Transfer-Encoding; b=I2bF1OU7ORkx2oKte9sCl8CFlYkNPYWZtquKO Ucy6Wz5pGTOZhRkOVK/Xl6s2WlPjuKYJHlLdz3PWdw0iml6JkNmhpjizbsgZEjdxcxM Gtpi56tDrjryT/D1KXWkxjn5KWH6PeRjcs3+oOKfB5X/7bOU8oBF4uoQ90XQIt3mdIg = Received: from relay.lc-words.com ([127.0.0.1]) by localhost (relay.lc-words.com [127.0.0.1]) (amavisd-maia, port 10024) with ESMTP id 01020-03; Mon, 16 Jun 2008 16:18:16 +0200 (CEST) Received: from [127.0.0.1] (77-254-170-53.adsl.inetia.pl [77.254.170.53]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: z.szalbot@lc-words.com) by relay.lc-words.com (Postfix) with ESMTPSA id 483EDC9445; Mon, 16 Jun 2008 16:18:16 +0200 (CEST) Message-ID: <48567664.2070005@lc-words.com> Date: Mon, 16 Jun 2008 16:19:16 +0200 From: Zbigniew Szalbot User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: Bill Moran References: <48565E7A.50807@lc-words.com> <20080616085534.ca7524f8.wmoran@potentialtech.com> In-Reply-To: <20080616085534.ca7524f8.wmoran@potentialtech.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard Cc: freebsd-questions@freebsd.org Subject: Re: RAID 1 / disk error / Offline uncorrectable sectors X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: z.szalbot@lc-words.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Jun 2008 14:19:20 -0000 Dear all, Bill Moran: >> My understanding is that RAID 1 no longer works because of this >> error. There is a bad sector on HD (Offline uncorrectable sectors) >> and the best we can do is replace the drive? Does it make sense to >> try to turn RAID 1 on ignoring this error (however, this is done in >> BIOS so the machine would have to be taken down in order to do >> that)? It seems serious enough for me not to ignore it but then I >> know close to nothing about HDs. > > Replace the hard drive. Every modern hard drive keeps extra space > available to "remap" bad sectors. This happens magically behind the > scenes without you ever knowing about it. Once you've hit > "uncorrectable" errors, it means your re-mappable sectors are used > up, and that means the drive is on its last legs. Thank you Bill. One last question. RAID 1 is off now (degraded) and the hosting company is asking if I can try to bring it up (to check if it will work). They have given me this link http://www.freebsd.org/doc/en/books/handbook/raid.html. The problem is that as far as I understand we are not using gmirror but RAID 1 turned on in BIOS (although it is also software-based). Thank you very much in advance! Zbigniew Szalbot www.lc-words.com