Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765110AbXFST3W (ORCPT ); Tue, 19 Jun 2007 15:29:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764641AbXFST3N (ORCPT ); Tue, 19 Jun 2007 15:29:13 -0400 Received: from dsl081-033-126.lax1.dsl.speakeasy.net ([64.81.33.126]:53984 "EHLO bifrost.lang.hm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764645AbXFST3M (ORCPT ); Tue, 19 Jun 2007 15:29:12 -0400 Date: Tue, 19 Jun 2007 12:28:02 -0700 (PDT) From: david@lang.hm X-X-Sender: dlang@asgard.lang.hm To: Phillip Susi cc: Brendan Conoboy , Lennart Sorensen , Neil Brown , Wakko Warner , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: limits on raid In-Reply-To: <4677F14A.5060909@cfl.rr.com> Message-ID: References: <18034.479.256870.600360@notabene.brown> <18034.3676.477575.490448@notabene.brown> <20070616020320.GB2002@animx.eu.org> <18035.23867.576212.859440@notabene.brown> <4677F14A.5060909@cfl.rr.com> 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: 1216 Lines: 31 On Tue, 19 Jun 2007, Phillip Susi wrote: > david@lang.hm wrote: >> one channel, 2 OS drives plus the 45 drives in the array. > > Huh? You can only have 16 devices on a scsi bus, counting the host adapter. > And I don't think you can even manage that much reliably with the newer > higher speed versions, at least not without some very special cables. 6 devices on the bus (2 OS drives, 3 promise drive shelves, controller card) >> yes I realize that there will be bottlenecks with this, the large capacity >> is to handle longer history (it's going to be a 30TB circular buffer being >> fed by a pair of OC-12 links) > > Building one of those nice packet sniffers for the NSA to install on AT&Ts > network eh? ;) just for going back in time to track hacker actions at a bank. I'm hopeing that once I figure out the drives the rest of the software will basicly boil down to tcpdump with the right options to write to a circular buffer of files. 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/