From owner-freebsd-questions@freebsd.org Thu Feb 28 18:39:07 2019 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E068C1512A9F for ; Thu, 28 Feb 2019 18:39:06 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 59AFF80E83 for ; Thu, 28 Feb 2019 18:39:06 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: by mailman.ysv.freebsd.org (Postfix) id 103381512A9E; Thu, 28 Feb 2019 18:39:06 +0000 (UTC) Delivered-To: questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F04871512A9B for ; Thu, 28 Feb 2019 18:39:05 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: from smtp.rcn.com (smtp.rcn.com [69.168.97.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E559A80E7D for ; Thu, 28 Feb 2019 18:39:04 +0000 (UTC) (envelope-from roberthuff@rcn.com) DKIM-Signature: v=1; a=rsa-sha1; d=rcn.com; s=20180516; c=relaxed/simple; q=dns/txt; i=@rcn.com; t=1551379138; h=From:Subject:Date:To:MIME-Version:Content-Type; bh=l/f5AXUFJeb9ZeS9/uGHDr9vUHI=; b=l3GsDseqZy0Bs+kvyjl2X0l+IxaImGNQaNCaWbhrlVXrZXQ8quhdwxlAtrx7hTlU J3KAbT85mtVVeyuACCKuhajqNrwSRu41DjfqqTxwLFeh6W6RgbeiZp6BCrjivKKA HnPAm0Xa1h06WUdTU7IctHim5KFs5OY8DNvKQSldsbTLE3MPJ8WlNYx+66lysHsk 9Ng57UfQ0gc3jF96tf/9Bd6ey8eCMsXP2q9dj6fiJiLO6v+oZ2r+cuvcF2N6SL5x atZed+h1LWEYeDsUOhn24oww2hHvyqyxPBlJm+/4yCyxsmY2Y42Bcu2VQ2j6Gn1m E6Iia1AImE6I4SsvEI3Irg==; X_CMAE_Category: , , X-CNFS-Analysis: v=2.2 cv=SYi1TbZu c=1 sm=1 tr=0 a=9TgA2UwI6Wy+6BV4wQM/cQ==:117 a=9TgA2UwI6Wy+6BV4wQM/cQ==:17 a=KGjhK52YXX0A:10 a=kj9zAlcOel0A:10 a=XRQyMpdBKAEA:10 a=CFTnQlWoA9kA:10 a=48faUk6PgeAA:10 a=chYb7KdzmobseOpqiiIA:9 a=CjuIK1q_8ugA:10 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine X-Authed-Username: cm9iZXJ0aHVmZkByY24uY29t Authentication-Results: smtp03.rcn.cmh.synacor.com header.from=roberthuff@rcn.com; sender-id=softfail Authentication-Results: smtp03.rcn.cmh.synacor.com smtp.user=roberthuff; auth=pass (PLAIN) Received: from [209.6.230.48] ([209.6.230.48:38012] helo=jerusalem.litteratus.org.litteratus.org) by smtp.rcn.com (envelope-from ) (ecelerity 3.6.25.56547 r(Core:3.6.25.0)) with ESMTPSA (cipher=AES256-GCM-SHA384) id 9D/53-28295-2CA287C5; Thu, 28 Feb 2019 13:38:58 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <23672.10945.503885.63881@jerusalem.litteratus.org> Date: Thu, 28 Feb 2019 13:38:57 -0500 From: Robert Huff To: questions@freebsd.org Subject: "check-hash protection" X-Mailer: VM 8.2.0b under 26.1 (amd64-portbld-freebsd13.0) X-Rspamd-Queue-Id: E559A80E7D X-Spamd-Bar: ------- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=rcn.com header.s=20180516 header.b=l3GsDseq; dmarc=pass (policy=none) header.from=rcn.com; spf=pass (mx1.freebsd.org: domain of roberthuff@rcn.com designates 69.168.97.78 as permitted sender) smtp.mailfrom=roberthuff@rcn.com X-Spamd-Result: default: False [-7.86 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[rcn.com:s=20180516]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:69.168.97.0/24]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(-1.00)[rcn.com.dwl.dnswl.org : 127.0.5.1]; IP_SCORE(-2.78)[ip: (-9.47), ipnet: 69.168.97.0/24(-4.60), asn: 36271(0.24), country: US(-0.07)]; DKIM_TRACE(0.00)[rcn.com:+]; DMARC_POLICY_ALLOW(-0.50)[rcn.com,none]; MX_GOOD(-0.01)[mx.rcn.com]; NEURAL_HAM_SHORT(-0.97)[-0.970,0]; RCVD_IN_DNSWL_LOW(-0.10)[78.97.168.69.list.dnswl.org : 127.0.5.1]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:36271, ipnet:69.168.97.0/24, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Feb 2019 18:39:07 -0000 [Isending this to questions@ for future referrence.] Recently upgraded a system from 11.* to HEAD. Had to run fsck, and it offered to add "check-hash protection". Not knowing what it was, I declined. Nothing in "man fsck"; nothing in "man tunefs"; nothing found using Google. Where is this documented? Prudently, Robert Huff