From nobody Sun May 28 16:06:50 2023 X-Original-To: questions@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4QTk7V0DsGz4XZ1D for ; Sun, 28 May 2023 16:07:02 +0000 (UTC) (envelope-from dpchrist@holgerdanske.com) Received: from holgerdanske.com (holgerdanske.com [IPv6:2001:470:0:19b::b869:801b]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "holgerdanske.com", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4QTk7T0KK6z3Gdm for ; Sun, 28 May 2023 16:07:00 +0000 (UTC) (envelope-from dpchrist@holgerdanske.com) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=holgerdanske.com header.s=nov-20210719-112354 header.b=xDK24A2J; spf=pass (mx1.freebsd.org: domain of dpchrist@holgerdanske.com designates 2001:470:0:19b::b869:801b as permitted sender) smtp.mailfrom=dpchrist@holgerdanske.com; dmarc=pass (policy=none) header.from=holgerdanske.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=holgerdanske.com; s=nov-20210719-112354; t=1685290010; bh=xyXBPt2tbLuEjVk7IjJGifea/pyxvEMsHhFUsBUBfPY=; h=Received:Message-ID:Date:MIME-Version:User-Agent:Subject: Content-Language:To:References:From:In-Reply-To:Content-Type: Content-Transfer-Encoding; b=xDK24A2JbxEdSpjE1svCbqxGI81g4PXNAyD9bpl7UCWB0UhY/0NAeVQFjjpey+d2s rDO5TsxgrfbJQHP60ZKQZlStT4oOTw5VS8DILYQKtbrUbOkrKwSGXxYioARb8YHlQF cH3XJ/xeBSzQxTm4kElhfSD2BOeycNBPm+szAzNCZHXSh5BIeHeACHDsdZ4uJo73FO bHOxET1P54if2G2SRAzAaON+lRFbc5dNo1/TMhJNah6722hxGOIGkOIxMFBlGvOQNf Kr67aJHCgxZYhUYhk+y3tB7KyGZsmX7GjnISeuKND2ZxsvWXQkicg/WiKEishObYej gvyX6Dkg5dWqkJCF/PuM2Wfyon5qLSwUHDbhVGjuVbg6TfOfj7Xa98srzq+D0y+I0h nJA5tA31VXzc8k4+KabhoPeDR50PRe3yuj2QNEJiacOLMooWSqIS2aGqmRgEzgxHbv To2yqTjTXp6wPo0I41tAz6uwdB0EoIPGn2/1u2NSOBHfRI8yk9SZ2//FhyW57k5NiK 38DcNU+KIg+KR4Y23IyGXtjpqWlm8Xkiii3Uit+zROlo5af3ok4NrnaTUcMvvHFLXW 2ymsJFEfLvsyLNSS0XG67Y39CGfpFM0rDD9Cs/4U8XelZ8fTb0Qbl/ap58X+1XkKEp 0pQ0k1sO/UG/rN9cnjqFgGak= Received: from 99.100.19.101 (99-100-19-101.lightspeed.frokca.sbcglobal.net [99.100.19.101]) by holgerdanske.com with ESMTPSA (TLS_AES_128_GCM_SHA256:TLSv1.3:Kx=any:Au=any:Enc=AESGCM(128):Mac=AEAD) (SMTP-AUTH username dpchrist@holgerdanske.com, mechanism PLAIN) for ; Sun, 28 May 2023 09:06:50 -0700 Message-ID: <2d9ca502-bce6-48ac-177c-84cf14f45063@holgerdanske.com> Date: Sun, 28 May 2023 09:06:50 -0700 List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: read and write back full disk to trigger relocation Content-Language: en-US To: questions@freebsd.org References: From: David Christensen In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-3.93 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.93)[-0.930]; DMARC_POLICY_ALLOW(-0.50)[holgerdanske.com,none]; R_SPF_ALLOW(-0.20)[+a:november.he.net]; R_DKIM_ALLOW(-0.20)[holgerdanske.com:s=nov-20210719-112354]; MIME_GOOD(-0.10)[text/plain]; DKIM_TRACE(0.00)[holgerdanske.com:+]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]; MLMMJ_DEST(0.00)[questions@freebsd.org]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_NONE(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[questions@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Rspamd-Queue-Id: 4QTk7T0KK6z3Gdm X-Spamd-Bar: --- X-ThisMailContainsUnwantedMimeParts: N On 5/28/23 04:12, Artem Kuchin wrote: > Hello! > > I have a 3TB gmirror raid and i noticed that it can be a case that some > data decays and i would never know it. > > If course i can run full disk read once in a while, but i'd rather > prefer to read  and write the data back, so it sector > > is damaged it can trigger relocation. > > Is there a ready made utility for such task or i need to write my one? > > Artem If you are worried about disk drives, I would look for a manufacturer diagnostic tool. Such tools can do things via an OS, but they can also tell the drive controller to do things directly. For example, Seagate: https://www.seagate.com/support/downloads/seatools/ You might want to consider switching to ZFS; it includes data and metadata integrity checks that can detect "bit rot" (and fix it, if you have redundancy; such as mirrors). David