From owner-freebsd-fs@freebsd.org Thu May 6 10:52:01 2021 Return-Path: Delivered-To: freebsd-fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id DE6125FB1DA for ; Thu, 6 May 2021 10:52:01 +0000 (UTC) (envelope-from ben.rubson@gmx.com) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4FbVl54nj2z4Y8R for ; Thu, 6 May 2021 10:52:01 +0000 (UTC) (envelope-from ben.rubson@gmx.com) Received: by mailman.nyi.freebsd.org (Postfix) id A46D65FB1D7; Thu, 6 May 2021 10:52:01 +0000 (UTC) Delivered-To: fs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id A434A5FB3EB for ; Thu, 6 May 2021 10:52:01 +0000 (UTC) (envelope-from ben.rubson@gmx.com) Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) (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 (2048 bits) client-digest SHA256) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FbVl42rdNz4Y1X for ; Thu, 6 May 2021 10:51:56 +0000 (UTC) (envelope-from ben.rubson@gmx.com) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1620298315; bh=DDng/DwbSEOhrDmWASJMMbO4wlkyRc2q2EOl+ktvQaQ=; h=X-UI-Sender-Class:From:Subject:Date:To; b=I3/vEhCrrPfI8TkcOHTpB3jqju9FA+rCDsvTEa5X79EbUKOMwusPs0unQiMXH09PA zgN/7rFVqdVdnU5HbSZYPL5jE7K6z4JoKA2CesxbVTWE9EB7DsWT8Gjh1Sr9lrNqka TI2h3IZLOmbc3THb/j2tGc97bF5xVst/AmnGtvTU= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from smtpclient.apple ([185.101.28.209]) by mail.gmx.net (mrgmx004 [212.227.17.184]) with ESMTPSA (Nemesis) id 1MIdiZ-1ljt540LBt-00EcNM for ; Thu, 06 May 2021 12:51:55 +0200 From: Ben RUBSON Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.80.0.2.43\)) Subject: Dual-port SAS HDD ? Message-Id: <578487FF-1D89-4A9E-AD97-6B5DCD9F785A@gmx.com> Date: Thu, 6 May 2021 12:51:54 +0200 To: "fs@freebsd.org" X-Mailer: Apple Mail (2.3654.80.0.2.43) X-Provags-ID: V03:K1:Kyr0ItV8NBQny7NcsLOp4g0icSvzSxnK40JzistILduQ/KZz1/e 5cobmz8vwueY+5QemEwEHaPJW5cWwQtfzNUr/CsIfC1Zfl05SdN8VnE8udCEWwyJ2fwVNbS rK1ulA8TnLTsYRJSIJxYA5IBEYCeQZynafq/zer9rg+dfLkXWQ3fbhe09ItmkuafaD09N6J Yqh2uIizVUzSP33hquwbA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:2dmN/8EXo0U=:X3XMs5y6WEwWm/RkWAuPPZ CdvlOJ9hS5kGlpj428OzLeXF8Q/8hR+IssETEajozKRdo7MAf5MfSuZh+KhJpbhmZvv1DVz1o 2mV2RaswspLsbnjsLxAqZMFrPuqcXZoV86aOEdN0WohF7j9BFGAMOLmXME4WN16uBiJz85ULI Txk3fdkomCLNxvQqFmI71HXJE+YszrNsdxWm1SaM8HmRS3QgWw8gClHKUo2HNzVDjZG6dt419 sRYuf0tzn7vQHJGlQGebDYpqNazAsMA4EF8I5up3RYRAqvoJii/ND0kCGdZAjbKyAMGVg1fCd zIXAwYXaS4WjWvCdlre1TekniNKbdjCbK+2Uo6nQvQ9kyzuOf9InBToXnj+iQfNsKKp7CFUXf J2NGkGXaxVAilCRCouF8sMGd0DDNDDmiEil58378M9FDfL/PWI067sN5WYmD3tQoAeIJW6G2O a7ETQ+EFqmu69tml9/nNtmDylyduvyhBq3jNsaRsMWeXP/qFVfy3zRAnuhiUk5BlwTshv+baX Z1plhov+hilWpgeHK+dF5OsECxfmxyJyFDOfHe3ccBI6H/fHTaRaHCz6A2Ehq4u6GW00MvEyf 6v9tefkJx0pItV/JqSd4HLPy1axnf+/9/TvYEpU/b+7lJIEDP7itpMYUg4gEMNJDr5sE6jzA8 Kk/3nCA6YxXMH7L/WjHonQaR04+DxL9v2bQuy+FGySWia6YrqE2oPvaTIe8wpd+o272J2R8qO AwTOimNZ+cUZ3esksyvI0nxr2teICsRz8CWCCVG2eSXULoWOvJwUuhs1SLgvsww3IE4dQ20tl 8ycOWMchHnyIxyXdSNGG5VMGIFXpc10QGIAJ3QnDf6xO2uz08ULzyNqnDmx2b9e0i4ttc2RjI ItNOJRfzgzfLNUyT0oXJzwD+g4Qw6kOVEH0RrBFUXeYiKxwwSIaYH+O3m6YuEDo67YdPGO1iJ Q7nQuI4H51XlfasCrkcsgg3xwVVnTw6i6hJ5f+3w4bS20I5ke3D18zZeE8j11IzQjhtIvv5gQ Gcip3PnjT4tpuOSHux+ExqsC86GMSJrip7H3nxCm032GurHeMKNfyupBs7JCNi7RqH/iUtl9f qhITEcjzqRLx/KIFmw1V3s9KYHFYkXReBigS6YpSVX3T+LuaVZqPOPSTm/Fdyv+zlBTrnXbMJ mn1pFPt5eRSgbYBED5kF8qPPHOueHEPM1FLwt0P9JF41eV9jJyIG+d+KPRsqAazYbjZO8= X-Rspamd-Queue-Id: 4FbVl42rdNz4Y1X X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmx.net header.s=badeba3b8450 header.b=I3/vEhCr; dmarc=pass (policy=none) header.from=gmx.com; spf=pass (mx1.freebsd.org: domain of ben.rubson@gmx.com designates 212.227.15.19 as permitted sender) smtp.mailfrom=ben.rubson@gmx.com X-Spamd-Result: default: False [-2.60 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:212.227.15.0/24]; FREEMAIL_FROM(0.00)[gmx.com]; MV_CASE(0.50)[]; DKIM_TRACE(0.00)[gmx.net:+]; DMARC_POLICY_ALLOW(-0.50)[gmx.com,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCVD_IN_DNSWL_LOW(-0.10)[212.227.15.19:from]; SUBJECT_ENDS_QUESTION(1.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmx.com]; MID_RHS_MATCH_FROM(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[212.227.15.19:from]; ASN(0.00)[asn:8560, ipnet:212.227.0.0/16, country:DE]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmx.net:s=badeba3b8450]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[fs@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[212.227.15.19:from:127.0.2.255]; TO_DN_EQ_ADDR_ALL(0.00)[]; RWL_MAILSPIKE_POSSIBLE(0.00)[212.227.15.19:from]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[fs] X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 May 2021 10:52:01 -0000 Hi, I'm building a new ZFS pool from scratch, choosing my own hardware = etc... For sure I'll go for the standard SAS2008 / SAS3008 controller. However, I'm wondering whether or not I should absolutely go for = dual-port SAS HDD (with dual backplane, controller...). I have some difficulties to find enterprise grade dual port SAS HDD. HGST used to provide Ultrastar SAS HDD which were dual-port. However, strangely, Western Digital does not advertise their Ultrastar = DC SAS HDD as bringing dual-port, so I guess they're not. Any thoughts / advices regarding this topic ? Many thanks for your help, Kind regards, Ben