Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755442AbZICN7S (ORCPT ); Thu, 3 Sep 2009 09:59:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754847AbZICN7R (ORCPT ); Thu, 3 Sep 2009 09:59:17 -0400 Received: from khc.piap.pl ([195.187.100.11]:45135 "EHLO khc.piap.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753098AbZICN7Q (ORCPT ); Thu, 3 Sep 2009 09:59:16 -0400 From: Krzysztof Halasa To: Ric Wheeler Cc: Christoph Hellwig , Mark Lord , Michael Tokarev , david@lang.hm, Pavel Machek , Theodore Tso , NeilBrown , Rob Landley , Florian Weimer , Goswin von Brederlow , kernel list , Andrew Morton , mtk.manpages@gmail.com, rdunlap@xenotime.net, linux-doc@vger.kernel.org, linux-ext4@vger.kernel.org, corbet@lwn.net Subject: Re: raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible) References: <20090828064449.GA27528@elf.ucw.cz> <20090828120854.GA8153@mit.edu> <20090830075135.GA1874@ucw.cz> <4A9A88B6.9050902@redhat.com> <4A9A9034.8000703@msgid.tls.msk.ru> <20090830163513.GA25899@infradead.org> <4A9BCCEF.7010402@redhat.com> <20090831131626.GA17325@infradead.org> <4A9BCDFE.50008@rtr.ca> <20090831132139.GA5425@infradead.org> <4A9F230F.40707@redhat.com> <4A9FA5F2.9090704@redhat.com> <4A9FC9B3.1080809@redhat.com> Date: Thu, 03 Sep 2009 15:59:13 +0200 In-Reply-To: <4A9FC9B3.1080809@redhat.com> (Ric Wheeler's message of "Thu, 03 Sep 2009 09:50:43 -0400") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 594 Lines: 16 Ric Wheeler writes: > We (red hat) have all kinds of different raid boxes... A have no doubt about it, but are those you know equipped with battery-backed write-back cache? Are they using SATA disks? We can _at_best_ compare non-battery-backed RAID using SATA disks with what we typically have in a PC. -- Krzysztof Halasa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/