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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8BA3CC4332F for ; Wed, 19 Oct 2022 21:01:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231594AbiJSVBB (ORCPT ); Wed, 19 Oct 2022 17:01:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231444AbiJSVBA (ORCPT ); Wed, 19 Oct 2022 17:01:00 -0400 Received: from mail.thelounge.net (mail.thelounge.net [91.118.73.15]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55F1517253B for ; Wed, 19 Oct 2022 14:00:55 -0700 (PDT) Received: from [10.10.10.2] (rh.vpn.thelounge.net [10.10.10.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) (Authenticated sender: h.reindl@thelounge.net) by mail.thelounge.net (THELOUNGE MTA) with ESMTPSA id 4Mt36X4ngczXSt; Wed, 19 Oct 2022 23:00:52 +0200 (CEST) Message-ID: Date: Wed, 19 Oct 2022 23:00:52 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: Performance Testing MD-RAID10 with 1 failed drive Content-Language: en-US To: Umang Agarwalla , linux-raid@vger.kernel.org References: From: Reindl Harald Organization: the lounge interactive design In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org Am 19.10.22 um 21:30 schrieb Umang Agarwalla: > Hello all, > > We run Linux RAID 10 in our production with 8 SAS HDDs 7200RPM. > We recently got to know from the application owners that the writes on > these machines get affected when there is one failed drive in this > RAID10 setup, but unfortunately we do not have much data around to > prove this and exactly replicate this in production. > > Wanted to know from the people of this mailing list if they have ever > come across any such issues. > Theoretically as per my understanding a RAID10 with even a failed > drive should be able to handle all the production traffic without any > issues. Please let me know if my understanding of this is correct or > not. "without any issue" is nonsense by common sense