From owner-freebsd-hackers Fri Jan 5 18:03:46 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id SAA17140 for hackers-outgoing; Fri, 5 Jan 1996 18:03:46 -0800 (PST) Received: from schizo.cdsnet.net (schizo.cdsnet.net [204.118.244.32]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id SAA17134 for ; Fri, 5 Jan 1996 18:03:42 -0800 (PST) Received: (from mrcpu@localhost) by schizo.cdsnet.net (8.6.12/8.6.12) id SAA28978; Fri, 5 Jan 1996 18:06:14 -0800 Date: Fri, 5 Jan 1996 18:06:13 -0800 (PST) From: Jaye Mathisen To: "Justin T. Gibbs" cc: hackers@freebsd.org Subject: Re: LUN support. In-Reply-To: <199601051945.LAA26831@freefall.freebsd.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@freebsd.org Precedence: bulk Hmmm, well, I never could get it to work, it didn't even find the second LUN's on the bootup BIOS sequence, let alone the kernel finding anything. I fold, it will just be 1 big 20GB disk. On Fri, 5 Jan 1996, Justin T. Gibbs wrote: > > > >I have a RAID box that can support multiple LUN's to appear as multiple > >RAID'd disks to the host. Ie, with 10GB of disk after parity, I can make > >1 LUN look like a 5GB disk, and 5 more LUN's of 1GB each. > > Look in sys/scsi to see how to create an entry for your device. It > should work. > > >I'm on a 2940 with FreeBSD 2.1-stable. > > The 2940 fully supports multiple LUNs. You will see a large performance > increate if you use tagged queuing since in the non-tagged case, the driver > will only queue one transaction per target (locking out transactions based > on the target-lun nexus was too constly down in the sequencer). Upgrade > to the latest -stable code and define the AHC_TAGENABLE option in your > kernel config file. > > -- > Justin T. Gibbs > =========================================== > FreeBSD: Turning PCs into workstations > =========================================== >