From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id 3B0237F3F for ; Tue, 23 Sep 2014 22:16:11 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay3.corp.sgi.com (Postfix) with ESMTP id BF180AC004 for ; Tue, 23 Sep 2014 20:16:07 -0700 (PDT) Received: from atvie01s.evermeet.cx (evermeet.cx [77.244.245.66]) by cuda.sgi.com with ESMTP id h4MDOaj9xWUuApug (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO) for ; Tue, 23 Sep 2014 20:16:05 -0700 (PDT) Message-ID: <5422376D.3000204@evermeet.cx> Date: Tue, 23 Sep 2014 23:15:57 -0400 From: Helmut Tessarek MIME-Version: 1.0 Subject: Re: How to format RAID1 correctly References: <5422146A.90206@evermeet.cx> <54222763.40107@sandeen.net> <5422285B.6010306@evermeet.cx> <542234F6.4080000@hardwarefreak.com> In-Reply-To: <542234F6.4080000@hardwarefreak.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: stan hoeppner , Eric Sandeen , xfs@oss.sgi.com On 23.09.14 23:05 , stan hoeppner wrote: > It confuses many people who are new to md RAID1. The above is the > *bitmap* chunk size, not the array chunk size. There is no array chunk > size for RAID1 as there is no striping. You must have striping to have > chunks. With md RAID1 every 4KB page write is simply mirrored to each > physical disk. Thanks for the info. I'm used to big ass storage subsystems, but new to SW RAID. I seems I have some catching up to do. -- regards Helmut K. C. Tessarek lookup http://sks.pkqs.net for KeyID 0xC11F128D /* Thou shalt not follow the NULL pointer for chaos and madness await thee at its end. */ _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs