From owner-freebsd-geom@freebsd.org Tue Apr 9 00:56:03 2019 Return-Path: Delivered-To: freebsd-geom@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 69C63156E5F1; Tue, 9 Apr 2019 00:56:03 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-oi1-x22e.google.com (mail-oi1-x22e.google.com [IPv6:2607:f8b0:4864:20::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 899D16C811; Tue, 9 Apr 2019 00:56:02 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: by mail-oi1-x22e.google.com with SMTP id e5so12156013oii.0; Mon, 08 Apr 2019 17:56:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:openpgp:autocrypt:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=pS0tp7ULDb5hmpCqEAmUjvYnnznYgybUw5Nmo28ViGY=; b=IR/iukTmsXrsCGfBSgUSld2DfCefYtOxh2kqbtBCn9hbEX16bEuKInQCccodC4pvtI AyutHssSIzGXlExW4C20zMTIHFXdbDyu2Yyh1bCidIFGkreYZ7JwYZ4BzIZ+/OyqDxxq JmFH0a/mkf8CTWJ+Nq939mt1lQ+UOryUuHT9whX1VsG4khH6igb4dLLA9QW2QA/dObwf iTdTJ81fsh5sW5wUOsxDVQ0TdKCxZ/GosuzvdiAP3QGp9vQCD+Sr+9ao8fIYkuDhBEpU CrCFVsIo7eOe3LrWsLUPRtkn1lrcrTqppiLdiBzAAuJZUA+gkEeQbGIZliWbqw4cbDCl oGSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:openpgp :autocrypt:message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=pS0tp7ULDb5hmpCqEAmUjvYnnznYgybUw5Nmo28ViGY=; b=lSrxEjXhcNLnpvugBrSsGzoyHYB94jBM90fWdAS2kyVwcDM/hs8oIm24vgNDQ5Ii0m 6KUFSlY56AzKZ2f9/QJpXmNT5P0LtflX97iSSouXsC4hOdQ6xFAMIjuBIdCfyyv0qY3k V5TViyGerLDSnZ2mkqBdmPbh0PX4xMGEJgDV1thaPkw7EYL5BLUAevoHFl4/VwMcmibU Ahf600tiMHaEufOWhkpeEjEKOKX1hHSP2DNXWt61A9FqfkFLP52a1I0c5KA1DHEJOG33 B1ckhea+j36vwppHRzcO+uvDL2nwpFFDpRUGz5WJ/Y316E18gpPbUlxZVgmlvGh3iAK8 EAcQ== X-Gm-Message-State: APjAAAX5xxq2q+Gq0D/h5FsY19mn40PS67V37jx9HdOvDUC81RQUAbC0 va9GxGX9xbuSvfDNmDLI7lN7fnwV X-Google-Smtp-Source: APXvYqwJ2mJaH96f5FaMB6bTKpeuo+1/nJh3KlXc41DMxlDY2wrCEmo817F5qLqXD1CzzSxFOeN8Kg== X-Received: by 2002:aca:3504:: with SMTP id c4mr17896736oia.74.1554771361187; Mon, 08 Apr 2019 17:56:01 -0700 (PDT) Received: from spectre.mavhome.dp.ua ([2600:1700:3580:3560:228:f8ff:fe04:d12]) by smtp.gmail.com with ESMTPSA id 96sm13272087otf.17.2019.04.08.17.56.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 08 Apr 2019 17:56:00 -0700 (PDT) Sender: Alexander Motin Subject: Re: about zfs and ashift and changing ashift on existing zpool To: Eugene Grosbein , "Kevin P. Neal" , Peter Jeremy Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org, tech-lists , freebsd-geom@freebsd.org References: <20190407153639.GA41753@rpi3.zyxst.net> <20190408212822.GD13734@server.rulingia.com> <20190409000009.GA65388@neutralgood.org> <9590cb82-64be-a2f9-a812-36f0ea324e4d@grosbein.net> From: Alexander Motin Openpgp: preference=signencrypt Autocrypt: addr=mav@FreeBSD.org; prefer-encrypt=mutual; keydata= mQENBFOzxAwBCADkPrax0pI2W/ig0CK9nRJJwsHitAGEZ2HZiFEuti+6/4UVxj81yr4ak/4g 9bKUyC7rMEAp/ZHNhd+MFCPAAcHPvtovnfykqE/vuosCS3wlSLloix2iKVLks0CwbLHGAyne 46lTQW74Xl/33c3W1Z6d8jD9gVFT/xaVzZ0U9xdzOmsYAZaAj4ki0tuxO9F7L+ct9grRe7iP g8t9hai7BL4ee3VRwk2JXnKb7UvBiVITKYWKz1jRvZIrjPokgEcCLOSlv7x/1kjuFnj3xWZU 7HSFFT8J93epBbrSSCsYsppIk2fZH41kaaFXsMQfTPH8wkeM6qwrvOh4HiQM08R+9tThABEB AAG0IUFsZXhhbmRlciBNb3RpbiA8bWF2QEZyZWVCU0Qub3JnPokBVwQTAQoAQQIbAwULCQgH AwUVCgkICwUWAwIBAAIeAQIXgAIZARYhBOmM88TmnMPNDledVYMYw5VbqyJ/BQJZYMKuBQkN McyiAAoJEIMYw5VbqyJ/tuUIAOG3ONOSNYqjK4eTZ1TVh9jdUBAhWk5nhDFnODN49Wj0AbYm 7aIqy8O1hnCDSZG5LttjSAo3UfXJZDKQM0BLb0gpRMBnAYqO6tdolLNqAbPGJBnGoPjsh24y 6KcbDaNnis+lD4GwPXwQM+92wZGhCUFElPV9NciZGVS65TNIgk7X+yEjjhD1MSWKKijZ1r9Z zIt4OzUTxxNOvzdlABZS88nNRdJkatOQJPmFdd1mpP6UzTNCiLUo1pIqOEtJgvVVDYq5WHY6 tciWWYdmZG/tIBexJmv2mV2OLVjXR6ZeKmntVH14H72/wRHJuYHQC+r5SVRcWWayrThsY6jZ Yr4+raS5AQ0EU7PEDAEIAOZgWf2cJIu+58IzP2dkXE/urj3tr4OqrB/yHGWUf71Lz6D0Fi6Z AXgDtmcFLGPfMyWuLAvSM+xmoguk7zC4hRBYvQycmIhuqBq1jO1Wp/Z+lpoPM/1cDYLn8Flv mI/c40MhUZh345DA4jYWWaZNjQHUWVQ1fPf595vdVVMPT/abE8E5DaF6fSkRmqFTmfYRkfbt 3ytU8NdUapDcJVY7cEP2nJBVNZPnOIObR/ZIgSxjjrG5o34yXoqeup8JvwEv+/NylzzuyXEZ R1EdEIzQ/a1nh/0j4NXtzZEqKW4aTWlmSqb6wN8jh1OSOOqkYsfnE3nfxcZbxi4IRoNQYlm5 9R8AEQEAAYkBPAQYAQoAJgIbDBYhBOmM88TmnMPNDledVYMYw5VbqyJ/BQJZYMLYBQkNMczM AAoJEIMYw5VbqyJ/TqgH/RQHClkvecE0262lwKoP/m0Mh4I5TLRgoJJn8S7G1BnqohYJkiLq A6xe6urGD7OqdNAl12UbrjWbdJV+zvea3vJoM4MZuYiYrGaXWxzFXqWJcPwMU9sAh8MRghHu uC5vgPb45Tnftw9/+n0i8GfVhQhOqepUGdQg4NPcXviSkoAvig6pp9Lcxisn0groUQKt15Gc sS9YcQWg3j9Hnipc6Mu416HX98Fb113NHJqc2geTHLkRyuBFOoyIqB6N9GKjzOAIzxxsVdl9 TevwGsrp4M4/RFzWbSgsbOnbE7454lmuVZGfReEjnUm8RHp9Q2UWKXlp3exlZjvOp/uVEpCg lz65AQ0EU7PEDAEIAOZgWf2cJIu+58IzP2dkXE/urj3tr4OqrB/yHGWUf71Lz6D0Fi6ZAXgD tmcFLGPfMyWuLAvSM+xmoguk7zC4hRBYvQycmIhuqBq1jO1Wp/Z+lpoPM/1cDYLn8FlvmI/c 40MhUZh345DA4jYWWaZNjQHUWVQ1fPf595vdVVMPT/abE8E5DaF6fSkRmqFTmfYRkfbt3ytU 8NdUapDcJVY7cEP2nJBVNZPnOIObR/ZIgSxjjrG5o34yXoqeup8JvwEv+/NylzzuyXEZR1Ed EIzQ/a1nh/0j4NXtzZEqKW4aTWlmSqb6wN8jh1OSOOqkYsfnE3nfxcZbxi4IRoNQYlm59R8A EQEAAYkBPAQYAQoAJgIbDBYhBOmM88TmnMPNDledVYMYw5VbqyJ/BQJZYMLYBQkNMczMAAoJ EIMYw5VbqyJ/TqgH/RQHClkvecE0262lwKoP/m0Mh4I5TLRgoJJn8S7G1BnqohYJkiLqA6xe 6urGD7OqdNAl12UbrjWbdJV+zvea3vJoM4MZuYiYrGaXWxzFXqWJcPwMU9sAh8MRghHuuC5v gPb45Tnftw9/+n0i8GfVhQhOqepUGdQg4NPcXviSkoAvig6pp9Lcxisn0groUQKt15GcsS9Y cQWg3j9Hnipc6Mu416HX98Fb113NHJqc2geTHLkRyuBFOoyIqB6N9GKjzOAIzxxsVdl9Tevw Gsrp4M4/RFzWbSgsbOnbE7454lmuVZGfReEjnUm8RHp9Q2UWKXlp3exlZjvOp/uVEpCglz4= Message-ID: Date: Mon, 8 Apr 2019 20:55:59 -0400 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <9590cb82-64be-a2f9-a812-36f0ea324e4d@grosbein.net> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 899D16C811 X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=IR/iukTm; spf=pass (mx1.freebsd.org: domain of mavbsd@gmail.com designates 2607:f8b0:4864:20::22e as permitted sender) smtp.mailfrom=mavbsd@gmail.com X-Spamd-Result: default: False [-5.96 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[FreeBSD.org]; NEURAL_HAM_SHORT(-0.99)[-0.994,0]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; RCPT_COUNT_SEVEN(0.00)[7]; RCVD_IN_DNSWL_NONE(0.00)[e.2.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; IP_SCORE(-2.75)[ip: (-8.57), ipnet: 2607:f8b0::/32(-2.95), asn: 15169(-2.18), country: US(-0.06)]; FORGED_SENDER(0.30)[mav@FreeBSD.org,mavbsd@gmail.com]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[mav@FreeBSD.org,mavbsd@gmail.com]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Apr 2019 00:56:03 -0000 On 08.04.2019 20:21, Eugene Grosbein wrote: > 09.04.2019 7:00, Kevin P. Neal wrote: > >>> My guess (given that only ada1 is reporting a blocksize mismatch) is that >>> your disks reported a 512B native blocksize. In the absence of any override, >>> ZFS will then build an ashift=9 pool. > > [skip] > >> smartctl 7.0 2018-12-30 r4883 [FreeBSD 11.2-RELEASE-p4 amd64] (local build) >> Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org >> >> === START OF INFORMATION SECTION === >> Vendor: SEAGATE >> Product: ST2400MM0129 >> Revision: C003 >> Compliance: SPC-4 >> User Capacity: 2,400,476,553,216 bytes [2.40 TB] >> Logical block size: 512 bytes >> Physical block size: 4096 bytes > > Maybe it't time to prefer "Physical block size" over "Logical block size" in relevant GEOMs > like GEOM_DISK, so upper levels such as ZFS would do the right thing automatically. No. It is a bad idea. Changing logical block size for existing disks will most likely result in breaking compatibility and inability to read previously written data. ZFS already uses physical block size when possible -- on pool creation or new vdev addition. When not possible (pool already created wrong) it just complains about it, so that user would know that his configuration is imperfect and he should not expect full performance. -- Alexander Motin