From owner-freebsd-scsi@FreeBSD.ORG Mon Apr 19 03:15:22 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8FA2616A4CE for ; Mon, 19 Apr 2004 03:15:22 -0700 (PDT) Received: from mailspool.ops.uunet.co.za (mailspool.ops.uunet.co.za [196.7.0.140]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2935843D2F for ; Mon, 19 Apr 2004 03:15:22 -0700 (PDT) (envelope-from sheldonh@starjuice.net) Received: from 196-31-32-4.dsl.jnb6.alter.net ([196.31.32.4] helo=urchin.seasidesoftware.co.za) by mailspool.ops.uunet.co.za with esmtp (Exim 3.36 #1) id 1BFVo8-000Hw0-00 for freebsd-scsi@freebsd.org; Mon, 19 Apr 2004 12:15:20 +0200 Received: from axl.seasidesoftware.co.za ([10.0.0.2]) by urchin.seasidesoftware.co.za with esmtp (Exim 4.20) id 1BFVo6-0000ic-Sy for freebsd-scsi@freebsd.org; Mon, 19 Apr 2004 12:15:18 +0200 From: Sheldon Hearn To: freebsd-scsi@freebsd.org Content-Type: text/plain Message-Id: <1082369718.11412.13.camel@axl.seasidesoftware.co.za> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 Date: Mon, 19 Apr 2004 12:15:18 +0200 Content-Transfer-Encoding: 7bit Subject: FreeBSD support for TH8BG-YF ? X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Apr 2004 10:15:22 -0000 Hi folks, Can anyone confirm that RELENG_4 will support a TH8BG-YF Quantum DLT 8000 LVD tape drive? I know, I know. If it's standards-compliant, it should be supported. As a consumer, I have no way of knowing about its standards compliance. :-) I haven't had good luck with FreeBSD and tape support yet, so I thought I'd check before we buy the equipment, this time. If nobody van vouch for this thing, perhaps someone could recommend something that's actually available at the moment. Most of the stuff I get positive hits for from archived mail is out of production. Ciao, Sheldon. From owner-freebsd-scsi@FreeBSD.ORG Mon Apr 19 04:34:31 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4284B16A4CE for ; Mon, 19 Apr 2004 04:34:31 -0700 (PDT) Received: from smtp-out7.xs4all.nl (smtp-out7.xs4all.nl [194.109.24.8]) by mx1.FreeBSD.org (Postfix) with ESMTP id BB49043D3F for ; Mon, 19 Apr 2004 04:34:30 -0700 (PDT) (envelope-from wkb@freebie.xs4all.nl) Received: from freebie.xs4all.nl (freebie.xs4all.nl [213.84.32.253]) by smtp-out7.xs4all.nl (8.12.10/8.12.10) with ESMTP id i3JBYSVb087170; Mon, 19 Apr 2004 13:34:29 +0200 (CEST) Received: from freebie.xs4all.nl (localhost [127.0.0.1]) by freebie.xs4all.nl (8.12.11/8.12.9) with ESMTP id i3JBYLMC010098; Mon, 19 Apr 2004 13:34:21 +0200 (CEST) (envelope-from wkb@freebie.xs4all.nl) Received: (from wkb@localhost) by freebie.xs4all.nl (8.12.11/8.12.11/Submit) id i3JBYLDT010097; Mon, 19 Apr 2004 13:34:21 +0200 (CEST) (envelope-from wkb) Date: Mon, 19 Apr 2004 13:34:21 +0200 From: Wilko Bulte To: Sheldon Hearn Message-ID: <20040419113421.GA10082@freebie.xs4all.nl> References: <1082369718.11412.13.camel@axl.seasidesoftware.co.za> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1082369718.11412.13.camel@axl.seasidesoftware.co.za> User-Agent: Mutt/1.4.1i X-OS: FreeBSD 4.10-BETA X-PGP: finger wilko@freebsd.org cc: freebsd-scsi@FreeBSD.ORG Subject: Re: FreeBSD support for TH8BG-YF ? X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Apr 2004 11:34:31 -0000 On Mon, Apr 19, 2004 at 12:15:18PM +0200, Sheldon Hearn wrote: > > Hi folks, > > Can anyone confirm that RELENG_4 will support a TH8BG-YF Quantum DLT > 8000 LVD tape drive? > > I know, I know. If it's standards-compliant, it should be supported. > As a consumer, I have no way of knowing about its standards compliance. > :-) Sofar DLTs always worked just fine for me with FreeBSD. Not the one you have, but as a sample: sa0: Removable Sequential Access SCSI-2 device sa0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit) ch0 at isp0 bus 0 target 0 lun 0 ch0: Removable Changer SCSI-2 device ch0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit) ch0: 10 slots, 1 drive, 1 picker, 0 portals -- Wilko Bulte wilko@FreeBSD.org From owner-freebsd-scsi@FreeBSD.ORG Wed Apr 21 13:44:18 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 15D6F16A4CE for ; Wed, 21 Apr 2004 13:44:18 -0700 (PDT) Received: from bremen.shuttle.de (bremen.shuttle.de [194.95.249.251]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2281043D49 for ; Wed, 21 Apr 2004 13:44:17 -0700 (PDT) (envelope-from schweikh@schweikhardt.net) Received: by bremen.shuttle.de (Postfix, from userid 10) id 881E73BCDE; Wed, 21 Apr 2004 22:44:15 +0200 (CEST) Received: from hal9000.schweikhardt.net (localhost [127.0.0.1]) i3LKi9bj044754 for ; Wed, 21 Apr 2004 22:44:09 +0200 (CEST) (envelope-from schweikh@hal9000.schweikhardt.net) Received: (from schweikh@localhost) by hal9000.schweikhardt.net (8.12.11/8.12.11/Submit) id i3LKi9Hv044753 for freebsd-scsi@freebsd.org; Wed, 21 Apr 2004 22:44:09 +0200 (CEST) (envelope-from schweikh) Date: Wed, 21 Apr 2004 22:44:09 +0200 From: Jens Schweikhardt To: freebsd-scsi@freebsd.org Message-ID: <20040421204409.GA44407@schweikhardt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.6i Subject: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2004 20:44:18 -0000 hello, world\n I want to change my system to no longer use vinum for striping, but rather a hardware solution. I do not intend to use mirroring or any other RAIDn>0 functionality. I have two pairs of identical U160 SCSI disks (2 Fujitsu MAN and MAM with 36GB each) where I want to build two mirrors, one from the MANs, and one from the MAMs. You get the idea. Until now I'm using an Adaptec 29160 Host Adapter, but of course it is not HW-RAID0 capable. What card am I looking for? The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of them were used at the same time they could saturate an U160 bus. Is this a problem? Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped) From owner-freebsd-scsi@FreeBSD.ORG Wed Apr 21 14:02:11 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D430716A4CE for ; Wed, 21 Apr 2004 14:02:11 -0700 (PDT) Received: from panzer.kdm.org (panzer.kdm.org [216.160.178.169]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6151943D39 for ; Wed, 21 Apr 2004 14:02:11 -0700 (PDT) (envelope-from ken@panzer.kdm.org) Received: from panzer.kdm.org (localhost [127.0.0.1]) by panzer.kdm.org (8.12.9/8.12.5) with ESMTP id i3LL2ACd034241; Wed, 21 Apr 2004 15:02:10 -0600 (MDT) (envelope-from ken@panzer.kdm.org) Received: (from ken@localhost) by panzer.kdm.org (8.12.9/8.12.5/Submit) id i3LL2ApC034240; Wed, 21 Apr 2004 15:02:10 -0600 (MDT) (envelope-from ken) Date: Wed, 21 Apr 2004 15:02:10 -0600 From: "Kenneth D. Merry" To: Jens Schweikhardt Message-ID: <20040421210209.GA34084@panzer.kdm.org> References: <20040421204409.GA44407@schweikhardt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040421204409.GA44407@schweikhardt.net> User-Agent: Mutt/1.4.1i cc: freebsd-scsi@freebsd.org Subject: Re: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2004 21:02:11 -0000 On Wed, Apr 21, 2004 at 22:44:09 +0200, Jens Schweikhardt wrote: > hello, world\n > > I want to change my system to no longer use vinum for striping, but > rather a hardware solution. I do not intend to use mirroring or any > other RAIDn>0 functionality. I have two pairs of identical U160 SCSI > disks (2 Fujitsu MAN and MAM with 36GB each) where I want to build two > mirrors, one from the MANs, and one from the MAMs. You get the idea. > > Until now I'm using an Adaptec 29160 Host Adapter, but of course it is > not HW-RAID0 capable. What card am I looking for? The only reason to go with a hardware controller for RAID-0 is if you want to boot from the array. Otherwise, you'll get better performance by using a software RAID-0 solution. Going through a RAID stack and a SCSI layer on a RAID card with a comparatively slow processor will generally be slower than using your much faster host processor to do all of that. ccd is an alternative if you don't want to use vinum. > The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of > them were used at the same time they could saturate an U160 bus. Is this > a problem? It's not a problem, unless you're interested in performance. I'd suggest a 2 channel Ultra160 or Ultra320 RAID controller. Hopefully the processor on the RAID controller will be able to keep up with the 280MB/sec theoretical maximum bandwidth from those disks. As for alternatives, you could get an Adaptec 2200S, or an LSI MegaRAID SCSI 320-2. I think the driver for the Adaptec is probably a little better maintained at the moment. I haven't used either card, though, so I can't really comment on them more than to point out the alternatives. Ken -- Kenneth Merry ken@kdm.org From owner-freebsd-scsi@FreeBSD.ORG Wed Apr 21 18:45:42 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2ED2C16A4CE for ; Wed, 21 Apr 2004 18:45:42 -0700 (PDT) Received: from anuket.mj.niksun.com (gwnew.niksun.com [65.115.46.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id 50EA343D2D for ; Wed, 21 Apr 2004 18:45:41 -0700 (PDT) (envelope-from ath@niksun.com) Received: from stiegl.mj.niksun.com (stiegl.mj.niksun.com [10.70.0.231]) i3M1jNRl014826; Wed, 21 Apr 2004 21:45:23 -0400 (EDT) (envelope-from ath@stiegl.mj.niksun.com) X-RAV-AntiVirus: This e-mail has been scanned for viruses. Received: by stiegl.mj.niksun.com (Postfix, from userid 1002) id 5E25E16521; Wed, 21 Apr 2004 21:45:23 -0400 (EDT) From: Andrew Heybey To: Don Bowman References: Date: Wed, 21 Apr 2004 21:45:23 -0400 In-Reply-To: (Don Bowman's message of "Thu, 15 Apr 2004 22:40:02 -0400") Message-ID: <85llkoyedo.fsf@stiegl.mj.niksun.com> User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.4 (Reasonable Discussion, berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii cc: freebsd-scsi@freebsd.org Subject: Re: freebsd, adaptec aic7902, 4 or more seagate drives == resets X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Apr 2004 01:45:42 -0000 Don Bowman writes: > has anyone successfully used 4 or more seagate > [10K or 15K] U320 drives on a single scsi > bus with an adaptec aic7902 controller? Yes. Six, to be precise: ahd0: port 0x4000-0x40ff,0x3800-0x38ff mem 0xfe9e0000-0xfe9e1fff irq 19 at device 7.0 on pci4 aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs ahd1: port 0x3400-0x34ff,0x3000-0x30ff mem 0xfe9f0000-0xfe9f1fff irq 20 at device 7.1 on pci4 aic7902: Ultra320 Wide Channel B, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs Waiting 5 seconds for SCSI devices to settle ses0 at ahd1 bus 0 target 6 lun 0 ses0: Fixed Processor SCSI-2 device ses0: 3.300MB/s transfers ses0: SAF-TE Compliant Device da0 at ahd1 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI-3 device da0: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled da0: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C) da2 at ahd1 bus 0 target 2 lun 0 da2: Fixed Direct Access SCSI-3 device da2: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled da2: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C) da1 at ahd1 bus 0 target 1 lun 0 da1: Fixed Direct Access SCSI-3 device da1: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled da1: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C) da5 at ahd1 bus 0 target 5 lun 0 da5: Fixed Direct Access SCSI-3 device da5: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled da5: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C) da4 at ahd1 bus 0 target 4 lun 0 da4: Fixed Direct Access SCSI-3 device da4: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled da4: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C) da3 at ahd1 bus 0 target 3 lun 0 da3: Fixed Direct Access SCSI-3 device da3: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled da3: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C) Mounting root from ufs:/dev/da0s1a This is an Intel SE7501WV2, running a basterdized FreeBSD 4.2 with various backported fixes and the ahd driver from -STABLE. It works fine, and we notice disk problems. andrew From owner-freebsd-scsi@FreeBSD.ORG Thu Apr 22 13:41:48 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 16FED16A4CE for ; Thu, 22 Apr 2004 13:41:48 -0700 (PDT) Received: from bremen.shuttle.de (bremen.shuttle.de [194.95.249.251]) by mx1.FreeBSD.org (Postfix) with ESMTP id 233D743D3F for ; Thu, 22 Apr 2004 13:41:47 -0700 (PDT) (envelope-from schweikh@schweikhardt.net) Received: by bremen.shuttle.de (Postfix, from userid 10) id E2C083BBBE; Thu, 22 Apr 2004 22:41:45 +0200 (CEST) Received: from hal9000.schweikhardt.net (localhost [127.0.0.1]) i3MKS6gf004608; Thu, 22 Apr 2004 22:28:06 +0200 (CEST) (envelope-from schweikh@hal9000.schweikhardt.net) Received: (from schweikh@localhost)i3MKS6Cp004607; Thu, 22 Apr 2004 22:28:06 +0200 (CEST) (envelope-from schweikh) Date: Thu, 22 Apr 2004 22:28:06 +0200 From: Jens Schweikhardt To: "Kenneth D. Merry" Message-ID: <20040422202806.GC991@schweikhardt.net> References: <20040421204409.GA44407@schweikhardt.net> <20040421210209.GA34084@panzer.kdm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040421210209.GA34084@panzer.kdm.org> User-Agent: Mutt/1.5.6i cc: freebsd-scsi@freebsd.org Subject: Re: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Apr 2004 20:41:48 -0000 Ken et al, On Wed, Apr 21, 2004 at 03:02:10PM -0600, Kenneth D. Merry wrote: # On Wed, Apr 21, 2004 at 22:44:09 +0200, Jens Schweikhardt wrote: # > hello, world\n # > # > I want to change my system to no longer use vinum for striping, but # > rather a hardware solution. I do not intend to use mirroring or any # > other RAIDn>0 functionality. I have two pairs of identical U160 SCSI # > disks (2 Fujitsu MAN and MAM with 36GB each) where I want to build two # > mirrors, one from the MANs, and one from the MAMs. You get the idea. # > # > Until now I'm using an Adaptec 29160 Host Adapter, but of course it is # > not HW-RAID0 capable. What card am I looking for? # # The only reason to go with a hardware controller for RAID-0 is if you want # to boot from the array. Yes, that's one of the reasons, plus certain issues with vinum. # Otherwise, you'll get better performance by using a software RAID-0 # solution. Going through a RAID stack and a SCSI layer on a RAID card with # a comparatively slow processor will generally be slower than using your # much faster host processor to do all of that. # # ccd is an alternative if you don't want to use vinum. I also want to get rid of a lot of configuration and any possible (present and future) maintenance issues that vinum and ccd have, like GEOMification and End-Of-Life. I do not want to make any assumptions about them, and the proper way to get rid of that issue is to simply not use them. Call me paranoid :-) # > The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of # > them were used at the same time they could saturate an U160 bus. Is this # > a problem? # # It's not a problem, unless you're interested in performance. I'd suggest a # 2 channel Ultra160 or Ultra320 RAID controller. Hopefully the processor on # the RAID controller will be able to keep up with the 280MB/sec theoretical # maximum bandwidth from those disks. # # As for alternatives, you could get an Adaptec 2200S, or an LSI MegaRAID # SCSI 320-2. I think the driver for the Adaptec is probably a little better # maintained at the moment. I haven't used either card, though, so I can't # really comment on them more than to point out the alternatives. I've looked at other Adaptec products, and found 29320-R := single channel U320 RAID0,1 Part Number: 1978100 which appears close to what I want, namely not the fully fledged RAID>1, and as a benefit there is an 68 pin Ultra Wide connector for my CD writer and DVD reader, so all my present devices can be used with just one controller. The card is advertised with The Adaptec SCSI Card 29320-R is a half-size, 64-bit 133 MHz PCI-X, single-channel Ultra320 SCSI card with integrated HostRAID. The 29320-R includes a legacy SCSI connector and is a cost effective hardware based RAID, a better alternative to software based RAID in the market today. It provides worry-free data protection at the fastest SCSI speeds available up to 320 MBps ideal for mainline storage, streaming video and audio, and other bandwidth-intensive applications. The card has a 68-pin HD external connector and a 68-pin HD internal connector for Ultra320 SCSI (LVD) hard disks drives and a 68-pin/50-pin legacy SCSI connector. The 29320-R offers an unparalleled degree of investment protection and upgradability to Adaptec's entire SCSI RAID family of products. It appears to have an "AIC-7901X" SCSI chip; would this card be supported by the ahd driver? The man page just mentions AIC-7901 without "X". Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped) From owner-freebsd-scsi@FreeBSD.ORG Thu Apr 22 14:03:38 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8820916A4CE for ; Thu, 22 Apr 2004 14:03:38 -0700 (PDT) Received: from panzer.kdm.org (panzer.kdm.org [216.160.178.169]) by mx1.FreeBSD.org (Postfix) with ESMTP id CAB8743D4C for ; Thu, 22 Apr 2004 14:03:36 -0700 (PDT) (envelope-from ken@panzer.kdm.org) Received: from panzer.kdm.org (localhost [127.0.0.1]) by panzer.kdm.org (8.12.9/8.12.5) with ESMTP id i3ML3XCd044513; Thu, 22 Apr 2004 15:03:33 -0600 (MDT) (envelope-from ken@panzer.kdm.org) Received: (from ken@localhost) by panzer.kdm.org (8.12.9/8.12.5/Submit) id i3ML3XRS044512; Thu, 22 Apr 2004 15:03:33 -0600 (MDT) (envelope-from ken) Date: Thu, 22 Apr 2004 15:03:33 -0600 From: "Kenneth D. Merry" To: Jens Schweikhardt Message-ID: <20040422210333.GA44397@panzer.kdm.org> References: <20040421204409.GA44407@schweikhardt.net> <20040421210209.GA34084@panzer.kdm.org> <20040422202806.GC991@schweikhardt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040422202806.GC991@schweikhardt.net> User-Agent: Mutt/1.4.1i cc: freebsd-scsi@freebsd.org Subject: Re: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Apr 2004 21:03:38 -0000 On Thu, Apr 22, 2004 at 22:28:06 +0200, Jens Schweikhardt wrote: > Ken et al, > > On Wed, Apr 21, 2004 at 03:02:10PM -0600, Kenneth D. Merry wrote: > # On Wed, Apr 21, 2004 at 22:44:09 +0200, Jens Schweikhardt wrote: > # > hello, world\n > # > > # > I want to change my system to no longer use vinum for striping, but > # > rather a hardware solution. I do not intend to use mirroring or any > # > other RAIDn>0 functionality. I have two pairs of identical U160 SCSI > # > disks (2 Fujitsu MAN and MAM with 36GB each) where I want to build two > # > mirrors, one from the MANs, and one from the MAMs. You get the idea. > # > > # > Until now I'm using an Adaptec 29160 Host Adapter, but of course it is > # > not HW-RAID0 capable. What card am I looking for? > # > # The only reason to go with a hardware controller for RAID-0 is if you want > # to boot from the array. > > Yes, that's one of the reasons, plus certain issues with vinum. Understandable. > # Otherwise, you'll get better performance by using a software RAID-0 > # solution. Going through a RAID stack and a SCSI layer on a RAID card with > # a comparatively slow processor will generally be slower than using your > # much faster host processor to do all of that. > # > # ccd is an alternative if you don't want to use vinum. > > I also want to get rid of a lot of configuration and any possible > (present and future) maintenance issues that vinum and ccd have, like > GEOMification and End-Of-Life. I do not want to make any assumptions > about them, and the proper way to get rid of that issue is to simply not > use them. Call me paranoid :-) That's understandable as well. > # > The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of > # > them were used at the same time they could saturate an U160 bus. Is this > # > a problem? > # > # It's not a problem, unless you're interested in performance. I'd suggest a > # 2 channel Ultra160 or Ultra320 RAID controller. Hopefully the processor on > # the RAID controller will be able to keep up with the 280MB/sec theoretical > # maximum bandwidth from those disks. > # > # As for alternatives, you could get an Adaptec 2200S, or an LSI MegaRAID > # SCSI 320-2. I think the driver for the Adaptec is probably a little better > # maintained at the moment. I haven't used either card, though, so I can't > # really comment on them more than to point out the alternatives. > > I've looked at other Adaptec products, and found > > 29320-R := single channel U320 RAID0,1 Part Number: 1978100 > > which appears close to what I want, namely not the fully fledged RAID>1, > and as a benefit there is an 68 pin Ultra Wide connector for my CD > writer and DVD reader, so all my present devices can be used with just > one controller. > > The card is advertised with > > The Adaptec SCSI Card 29320-R is a half-size, 64-bit 133 MHz PCI-X, > single-channel Ultra320 SCSI card with integrated HostRAID. The > 29320-R includes a legacy SCSI connector and is a cost effective > hardware based RAID, a better alternative to software based RAID in > the market today. It provides worry-free data protection at the > fastest SCSI speeds available up to 320 MBps ideal for mainline > storage, streaming video and audio, and other bandwidth-intensive > applications. The card has a 68-pin HD external connector and a > 68-pin HD internal connector for Ultra320 SCSI (LVD) hard disks > drives and a 68-pin/50-pin legacy SCSI connector. The 29320-R offers > an unparalleled degree of investment protection and upgradability to > Adaptec's entire SCSI RAID family of products. > > It appears to have an "AIC-7901X" SCSI chip; would this card be > supported by the ahd driver? The man page just mentions AIC-7901 without "X". Well, calling it a "hardware based RAID" controller is stretching it a little bit. The HostRAID controllers are standard SCSI controllers with a special BIOS that understands on-disk RAID metadata. That special BIOS allows you to boot off the array. Once the OS takes over from the BIOS, though, it has to have a RAID stack that understands the particular RAID metadata in use. So you would need to modify vinum or ccd to understand Adaptec HostRAID metadata, or you'd need to write your own RAID stack that would do it. The format is available, for anyone who wants to do it. The following are pointers to Linux HostRAID implementations, which include the metadata format: http://people.freebsd.org/~ken/linux/md.html http://people.freebsd.org/~gibbs/linux/SRC/emd-0.8.0-tar.gz The first one is an older version, the second one is a newer more up to date version. Ken -- Kenneth Merry ken@kdm.org From owner-freebsd-scsi@FreeBSD.ORG Fri Apr 23 11:45:45 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 63C4A16A4CE for ; Fri, 23 Apr 2004 11:45:45 -0700 (PDT) Received: from smtp.covadmail.net (mx07.covadmail.net [63.65.120.67]) by mx1.FreeBSD.org (Postfix) with SMTP id D2F3243D1D for ; Fri, 23 Apr 2004 11:45:44 -0700 (PDT) (envelope-from strick@covad.net) Received: (covad.net 2906 invoked from network); 23 Apr 2004 18:45:39 -0000 Received: from unknown (HELO mist.nodomain) (strick@covad.net@67.101.98.93) by sun-qmail02 with SMTP; 23 Apr 2004 18:45:39 -0000 Received: from mist.nodomain (localhost [127.0.0.1]) by mist.nodomain (8.12.9p2/8.12.9) with ESMTP id i3NIjcoK000415; Fri, 23 Apr 2004 11:45:39 -0700 (PDT) (envelope-from dan@mist.nodomain) Received: (from dan@localhost) by mist.nodomain (8.12.9p2/8.12.9/Submit) id i3NIjWMJ000414; Fri, 23 Apr 2004 11:45:32 -0700 (PDT) (envelope-from dan) Date: Fri, 23 Apr 2004 11:45:32 -0700 (PDT) From: Dan Strick Message-Id: <200404231845.i3NIjWMJ000414@mist.nodomain> To: schweikh@schweikhardt.net cc: freebsd-scsi@freebsd.org Subject: Re: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Apr 2004 18:45:45 -0000 >> > ... > I have two pairs of identical U160 SCSI disks > ... > Until now I'm using an Adaptec 29160 Host Adapter, but of course it is > not HW-RAID0 capable. What card am I looking for? > > The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of > them were used at the same time they could saturate an U160 bus. Is this > a problem? > ... >> We can assume that a high speed SCSI host adapter will have a faster PCI interface but the vast majority of even modern motherboards have only a traditional 33 MHz 32 bit PCI which would saturate well below 133 Mbyte/sec. What variety of PCI bus does your system have? Dan Strick strick@covad.net From owner-freebsd-scsi@FreeBSD.ORG Fri Apr 23 12:21:29 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 953F416A4CE for ; Fri, 23 Apr 2004 12:21:29 -0700 (PDT) Received: from bremen.shuttle.de (bremen.shuttle.de [194.95.249.251]) by mx1.FreeBSD.org (Postfix) with ESMTP id C1A0543D2F for ; Fri, 23 Apr 2004 12:21:28 -0700 (PDT) (envelope-from schweikh@schweikhardt.net) Received: by bremen.shuttle.de (Postfix, from userid 10) id 2BEB93BAA1; Fri, 23 Apr 2004 21:21:27 +0200 (CEST) Received: from hal9000.schweikhardt.net (localhost [127.0.0.1]) i3NJGsQs029070; Fri, 23 Apr 2004 21:16:54 +0200 (CEST) (envelope-from schweikh@hal9000.schweikhardt.net) Received: (from schweikh@localhost)i3NJGsjn029069; Fri, 23 Apr 2004 21:16:54 +0200 (CEST) (envelope-from schweikh) Date: Fri, 23 Apr 2004 21:16:53 +0200 From: Jens Schweikhardt To: Dan Strick Message-ID: <20040423191653.GA28887@schweikhardt.net> References: <200404231845.i3NIjWMJ000414@mist.nodomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200404231845.i3NIjWMJ000414@mist.nodomain> User-Agent: Mutt/1.5.6i cc: freebsd-scsi@freebsd.org Subject: Re: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Apr 2004 19:21:29 -0000 On Fri, Apr 23, 2004 at 11:45:32AM -0700, Dan Strick wrote: # >> # > ... # > I have two pairs of identical U160 SCSI disks # > ... # > Until now I'm using an Adaptec 29160 Host Adapter, but of course it is # > not HW-RAID0 capable. What card am I looking for? # > # > The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of # > them were used at the same time they could saturate an U160 bus. Is this # > a problem? # > ... # >> # # We can assume that a high speed SCSI host adapter will have a faster # PCI interface but the vast majority of even modern motherboards have # only a traditional 33 MHz 32 bit PCI which would saturate well below # 133 Mbyte/sec. # # What variety of PCI bus does your system have? Good point! The board is an ASUS A7N8X, the manual says it has a PCI 2.2 conformant bus, with a 133MB max throughput. So any U320 RAID is certainly overkill. Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)