From owner-freebsd-questions@freebsd.org Mon Jul 10 15:36:24 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 67BDFDAB089 for ; Mon, 10 Jul 2017 15:36:24 +0000 (UTC) (envelope-from guru@unixarea.de) Received: from ms-10.1blu.de (ms-10.1blu.de [178.254.4.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3243468BC9 for ; Mon, 10 Jul 2017 15:36:23 +0000 (UTC) (envelope-from guru@unixarea.de) Received: from [89.204.135.176] (helo=[10.148.186.176]) by ms-10.1blu.de with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.86_2) (envelope-from ) id 1dUajU-0006it-Ke for freebsd-questions@freebsd.org; Mon, 10 Jul 2017 17:36:20 +0200 From: Matthias Apitz To: Subject: Re: Unusual Question Date: Mon, 10 Jul 2017 17:36:19 +0200 User-Agent: Dekko/0.6.20; Qt/5.4.1; ubuntumirclient; Linux; MIME-Version: 1.0 Message-ID: <4eff21f6-84f2-4cc5-8b92-b7e787be8853@unixarea.de> In-Reply-To: <26749.128.135.52.6.1499700385.squirrel@cosmo.uchicago.edu> References: <888578F8-AD68-4993-823C-152789F3C929@mail.sermon-archive.info> <52627.76.193.16.95.1499645892.squirrel@cosmo.uchicago.edu> <20170710052228.GA2338@c720-r314251> <20170710090547.15ee3afc07c09955ba621ae1@sohara.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Con-Id: 51246 X-Con-U: 0-guru X-Originating-IP: 89.204.135.176 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Jul 2017 15:36:24 -0000 The OP should just compile an own version of dd(1) which punches lets say=20 every thousand blocks the current block number to see how far (or better=20 how less) it will walk through before the kernel halts/crashes. matthias --=20 Sent from my Ubuntu phone http://www.unixarea.de/