From owner-freebsd-questions@FreeBSD.ORG Mon Nov 16 21:44:26 2009 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 19E6D106566B for ; Mon, 16 Nov 2009 21:44:26 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (muon.cran.org.uk [66.246.138.153]) by mx1.freebsd.org (Postfix) with ESMTP id E701B8FC15 for ; Mon, 16 Nov 2009 21:44:25 +0000 (UTC) Received: from unknown (87-194-158-129.bethere.co.uk [87.194.158.129]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA id 77D0181B9; Mon, 16 Nov 2009 21:44:24 +0000 (UTC) Date: Mon, 16 Nov 2009 21:43:31 +0000 From: Bruce Cran To: Roland Smith Message-ID: <20091116214331.00007810@unknown> In-Reply-To: <20091116182358.GA95918@slackbox.xs4all.nl> References: <42307.1258330015@tristatelogic.com> <20091116182358.GA95918@slackbox.xs4all.nl> X-Mailer: Claws Mail 3.7.2cvs15 (GTK+ 2.16.0; i586-pc-mingw32msvc) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org, "Ronald F. Guilmette" Subject: Re: Bad Blocks... Should I RMA? 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: Mon, 16 Nov 2009 21:44:26 -0000 On Mon, 16 Nov 2009 19:23:58 +0100 Roland Smith wrote: > Install the smartmontools port, and check the drive with > 'smartctl -a /dev/ad4'. If you see a non-zero Reallocated_Sector_Ct, > RMA it immediately, as it is about to fail. If see other errors > reported, RMA it. > > (S)ATA disk have spare sectors available. If a sector fails, it is > replaced by one of the spares by the firmware. If you see a non-zero > Reallocated_Sector_Ct, it means that the drive has run out of spares. > This is bad news. Surely it's the other way around - if you see a value of zero in the "value" column the drive has run out of spare sectors and it's time to RMA the drive? From what I've seen the 'raw' column appears to count the number of sectors the drive has remapped using the spares buffer. If it gets into the hundreds it's probably time to think about RMA'ing the drive - if you trust that the 'raw' column is reporting what you think it is (you should really only base your decision on the value, worst and threshold columns). -- Bruce Cran