From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D79FC5519F for ; Wed, 25 Nov 2020 09:39:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C9C51206B5 for ; Wed, 25 Nov 2020 09:39:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ant.gliwice.pl header.i=@ant.gliwice.pl header.b="Rj/Cykb8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726284AbgKYJjA (ORCPT ); Wed, 25 Nov 2020 04:39:00 -0500 Received: from ns1.ant.gliwice.pl ([195.66.73.63]:40104 "EHLO mail.ant.gliwice.pl" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725921AbgKYJi7 (ORCPT ); Wed, 25 Nov 2020 04:38:59 -0500 X-Greylist: delayed 441 seconds by postgrey-1.27 at vger.kernel.org; Wed, 25 Nov 2020 04:38:58 EST Received: from matkor-hp.localnet (unknown [91.198.89.112]) by mail.ant.gliwice.pl (Postfix) with ESMTPSA id 1775CC239; Wed, 25 Nov 2020 09:31:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ant.gliwice.pl; s=default; t=1606296695; bh=/VlzlTxXe6SYEhydHUJFKq47ZfNNlI4S2Z5eIfz/6Dk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Rj/Cykb8EjGWVaqeB1Cih9AOlb+uiUIcKXxuY2hEchzvQqJMaSwuKVJtCRQPlkjTf nb4y2vYvquObBrOtrQ/Fn6zFQNTCuiXe1KL6MjkYZvDr2ZSMisP4jVj9uehR3LAJJN 38oBgNvDen+4GS4mRVf2PtVvYO0wNVhMsqmS/3GGFVJF15EWquTNj+F/wShkIfHCcS 8m0/pCHXaS6LnCuy+m65jv6IgJEM1A2oaMTIX6HI/CI+2Gc1IBY3KvrOhhj1mylXeb ZHjFirz2BhiTGeGa9aJ67gUSMTEUGK94E9ZXqBLGrYevN44UV+J9Aema+1DUTeSiya 8XstyQ3xNSQwg== From: Mateusz To: Linux RAID , Alex Subject: Re: Considering new SATA PCIe card Date: Wed, 25 Nov 2020 10:31:32 +0100 Message-ID: <9796958.nUPlyArG6x@matkor-hp> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On =C5=9Broda, 25 listopada 2020 03:20:20 CET Alex wrote: > (...) server with 4x4TB 7200 SATA disks in > RAID5 (...) motherboard has two > SATA-6 ports on it and the others are SATA3. >=20 > Would there really be any benefit to purchasing a new controller such > as this for it instead of the onboard for the 4x4TB disks? I doubt it, unless your MB HW/driver is broken, as usual max transfer rate = of=20 7200 HDD is around 150MB and SATA 2.0 ( 3 Gbit/s ) limit is 300MB Check current HW performance by sth like: iostat -x 3 -m and verify if you are close to expected HDD values under real load/test=20 stress. > I'm also curious if the SATA cables have improved over time, or are > the same cables I purchased five years ago just as good today? If controller works in SATA-300 mode on all ports already, you will not get= =20 any benefit from newer (SATA-600) cables neither. Regards, =2D-=20 Mateusz=20 (...) mam brata - powa=C5=BCny, domator, liczykrupa, hipokryta, pobo=C5=BCn= i=C5=9B, kr=C3=B3tko m=C3=B3wi=C4=85c - podpora spo=C5=82ecze=C5=84stwa." Nikos Kazantzakis - "Grek Zorba"