Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933222AbXFRV4k (ORCPT ); Mon, 18 Jun 2007 17:56:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933180AbXFRV42 (ORCPT ); Mon, 18 Jun 2007 17:56:28 -0400 Received: from dsl081-033-126.lax1.dsl.speakeasy.net ([64.81.33.126]:46912 "EHLO bifrost.lang.hm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933171AbXFRV40 (ORCPT ); Mon, 18 Jun 2007 17:56:26 -0400 Date: Mon, 18 Jun 2007 14:56:10 -0700 (PDT) From: david@lang.hm X-X-Sender: dlang@asgard.lang.hm To: Wakko Warner cc: Brendan Conoboy , Lennart Sorensen , Neil Brown , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: limits on raid In-Reply-To: <20070618214633.GA15468@animx.eu.org> Message-ID: References: <18035.23867.576212.859440@notabene.brown> <4676BEC2.7090809@redhat.com> <20070618180327.GP10008@csclub.uwaterloo.ca> <20070618183324.GL10006@csclub.uwaterloo.ca> <4676D8DE.3050903@redhat.com> <20070618214633.GA15468@animx.eu.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1134 Lines: 32 On Mon, 18 Jun 2007, Wakko Warner wrote: > Subject: Re: limits on raid > > david@lang.hm wrote: >> On Mon, 18 Jun 2007, Brendan Conoboy wrote: >> >>> david@lang.hm wrote: >>>> yes, sorry, ultra 320 wide. >>> >>> Exactly how many channels and drives? >> >> one channel, 2 OS drives plus the 45 drives in the array. > > Given that the drives only have 4 ID bits, how can you have 47 drives on 1 > cable? You'd need a minimum of 3 channels for 47 drives. Do you have some > sort of external box that holds X number of drives and only uses a single > ID? yes, I'm useing promise drive shelves, I have them configured to export the 15 drives as 15 LUNs on a single ID. I'm going to be useing this as a huge circular buffer that will just be overwritten eventually 99% of the time, but once in a while I will need to go back into the buffer and extract and process the data. David Lang - 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/