From owner-freebsd-scsi@freebsd.org Tue Jul 28 17:01:47 2015 Return-Path: Delivered-To: freebsd-scsi@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2AC8C9AD96E for ; Tue, 28 Jul 2015 17:01:47 +0000 (UTC) (envelope-from dan@langille.org) Received: from clavin1.langille.org (clavin.langille.org [162.208.116.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "clavin.langille.org", Issuer "StartCom Class 2 Primary Intermediate Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0ACEBF54 for ; Tue, 28 Jul 2015 17:01:46 +0000 (UTC) (envelope-from dan@langille.org) Received: from (clavin1.int.langille.org (clavin1.int.unixathome.org [10.4.7.7]) (Authenticated sender: hidden) with ESMTPSA id DFD5F62FE for ; Tue, 28 Jul 2015 17:01:38 +0000 (UTC) From: Dan Langille Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: dmesg output not as expected Message-Id: <5A302DC6-C3EF-4DB1-8AD1-A0314C048A28@langille.org> Date: Tue, 28 Jul 2015 13:01:37 -0400 To: freebsd-scsi@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2102\)) X-Mailer: Apple Mail (2.2102) X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Jul 2015 17:01:47 -0000 I wish to move a tape library from one system to another. Today I moved = the cable from one system to another and ran 'camcontrol rescan all'. For sa0, why do I see 80MB/s on the old system vs 40MB/s on the new = system? Is this card related? Slot related? Similarly, ch0 goes from 20MB/s to 3.3MB/s....=20 I was hoping for a speed boost. :) Some of the camcontrol devlist output includes: at scbus14 target 1 lun 0 = (pass11,sa0) at scbus14 target 3 lun 0 = (pass12,ch0) This is on the existing system: I *think* this system holds a Symbios Ultra2 32-bit PCI SCSI Adapter = SYM8951U Jul 23 13:24:19 knew kernel: sym0: <895> port 0xe000-0xe0ff mem = 0xfebeec00-0xfebeecff,0xfebef000-0xfebeffff irq 22 at device 2.0 on pci4 Jul 23 13:24:19 knew kernel: sym0: No NVRAM, ID 7, Fast-40, LVD, parity = checking Jul 23 13:24:19 knew kernel: sa0 at sym0 bus 0 scbus7 target 1 lun 0 Jul 23 13:24:19 knew kernel: sa0: Removable = Sequential Access SCSI-2 device=20 Jul 23 13:24:19 knew kernel: sa0: Serial Number CXB46H0716 =20 Jul 23 13:24:19 knew kernel: sa0: 80.000MB/s transfers (40.000MHz, = offset 31, 16bit) Jul 23 13:24:19 knew kernel: ch0 at sym0 bus 0 scbus7 target 3 lun 0 Jul 23 13:24:19 knew kernel: ch0: Removable = Changer SCSI-2 device=20 Jul 23 13:24:19 knew kernel: ch0: Serial Number 3G22JJP38S46 Jul 23 13:24:19 knew kernel: ch0: 20.000MB/s transfers (10.000MHz, = offset 15, 16bit) Jul 23 13:24:19 knew kernel: ch0: 25 slots, 1 drive, 1 picker, 1 portal Jul 23 13:24:19 knew kernel: ch0: quirks=3D0x2 This is the same tape drive on another system: LSI Logic Ultra320 (LSI20320IE) SCSI PCI-E mpt0: port 0x8000-0x80ff mem = 0xfb220000-0xfb23ffff,0xfb200000-0xfb21ffff irq 19 at device 8.0 on = pci15 mpt0: MPI Version=3D1.2.14.0 Jul 28 16:36:31 varm kernel: sa0 at mpt0 bus 0 scbus14 target 1 lun 0 Jul 28 16:36:31 varm kernel: sa0: Removable = Sequential Access SCSI-2 device Jul 28 16:36:31 varm kernel: sa0: Serial Number CXB46H0716 =20 Jul 28 16:36:31 varm kernel: sa0: 40.000MB/s transfers (40.000MHz DT, = offset 6) Jul 28 16:37:03 varm kernel: ch0 at mpt0 bus 0 scbus14 target 3 lun 0 Jul 28 16:37:03 varm kernel: ch0: Removable = Changer SCSI-2 device Jul 28 16:37:03 varm kernel: ch0: Serial Number 3G22JJP38S46 Jul 28 16:37:03 varm kernel: ch0: 3.300MB/s transfers Jul 28 16:37:03 varm kernel: ch0: 25 slots, 1 drive, 1 picker, 1 portal Jul 28 16:37:03 varm kernel: ch0: quirks=3D0x2 Thank you. =E2=80=94=20 Dan Langille http://langille.org/