From owner-freebsd-chat Mon Aug 4 17:46:40 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id RAA09029 for chat-outgoing; Mon, 4 Aug 1997 17:46:40 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id RAA09024 for ; Mon, 4 Aug 1997 17:46:37 -0700 (PDT) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id KAA24990; Tue, 5 Aug 1997 10:16:25 +0930 (CST) From: Michael Smith Message-Id: <199708050046.KAA24990@genesis.atrad.adelaide.edu.au> Subject: Re: Sysadmin levels today? In-Reply-To: from The Hermit Hacker at "Aug 4, 97 03:15:56 pm" To: scrappy@hub.org (The Hermit Hacker) Date: Tue, 5 Aug 1997 10:16:25 +0930 (CST) Cc: msmith@atrad.adelaide.edu.au, freebsd-chat@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-chat@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk The Hermit Hacker stands accused of saying: > On Fri, 1 Aug 1997, Michael Smith wrote: > > > Yeah. Not to mention that you can put 8 LUNs on each unit, which > > makes the correct answer 57 or 121 respectively. > > Damn, I forgot about that...I've never actually *seen* this done > though...what sort of 'max' has anyone seen hanging off of one scsi bus? Hmm, I've seen a bus entirely populated with MD21's, so 14 disks, and one with four 5-tape units for 20 tape drives. I've also seen a controller that would let you put four SMD disks on a single SCSI ID at separate LUNs (in a Sequent, I think), so you can imagine what 28 1GB SMD disks would look and sound like 8) Still, the basic problem is the bus bandwidth; it's just not up to that sort of load. > Marc G. Fournier -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[