From owner-freebsd-questions@FreeBSD.ORG Wed Apr 26 22:10:46 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6F8D016A401 for ; Wed, 26 Apr 2006 22:10:46 +0000 (UTC) (envelope-from fbsd@globalmegahost.com) Received: from soulgamer.com (soulgamer.com [192.220.112.173]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3D98C43D46 for ; Wed, 26 Apr 2006 22:10:45 +0000 (GMT) (envelope-from fbsd@globalmegahost.com) Received: from localhost (ulmer@localhost) by soulgamer.com (8.12.11.20060308) id k3QMAkGG023540 for ; Wed, 26 Apr 2006 16:10:46 -0600 (MDT) Date: Wed, 26 Apr 2006 22:10:46 +0000 (GMT) From: fbsd@globalmegahost.com X-X-Sender: ulmer@soulgamer.com To: freebsd-questions@freebsd.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: How do I swap tape drives (sa0) without rebooting? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Apr 2006 22:10:46 -0000 Hello list. I have a freebsd 6.1-RC1 machine that I am using to test bacula and various tape drives. If the machine boots up while the tape drive is attached and powered up, the tape drive is recognized. If I turn off the tape drive and attach a different drive, I cannot seem to convince the OS that a tape drive is present. What am I doing wrong? machine: - supermicro super server 6013P-8 with zero channel raid controller - SMP hardware, UP kernel with ASR_COMPAT - FreeBSD name 6.1-RC FreeBSD 6.1-RC #1: Fri Apr 21 16:09:23 MDT 2006 relevant dmesg data: asr0: mem 0xf8300000-0xf83fffff,0xfb000000-0xfbffffff,0xfc000000-0xfdffffff irq 30 at device 3.0 on pci3 asr0: [GIANT-LOCKED] asr0: ADAPTEC 2015S FW Rev. 3B0A, 2 channel, 256 CCBs, Protocol I2O sa0 at asr0 bus 1 target 6 lun 0 sa0: Removable Sequential Access SCSI-3 device ses0 at asr0 bus 0 target 6 lun 0 ses0: Fixed Processor SCSI-2 device ses0: SAF-TE Compliant Device da0 at asr0 bus 0 target 0 lun 0 da0: Fixed Direct Access SCSI-2 device da0: Tagged Queueing Enabled da0: 70006MB (143372288 512 byte sectors: 255H 63S/T 8924C) The drive vendor documentation states that the drive's auto-termination is only in effect when the drive's power is on. When I power down and disconnect the drive /var/log/messages receives the following. Apr 26 13:57:20 name kernel: (sa0:asr0:1:0:0): lost device Apr 26 13:57:20 name kernel: (sa0:asr0:1:0:0): removing device entry So I reboot, and try a different disconnect method. # camcontrol stop sa0 Unit stopped successfully # camcontrol devlist at scbus0 target 0 lun 0 (da0,pass0) at scbus0 target 6 lun 0 (ses0,pass1) at scbus1 target 6 lun 0 (sa0,pass2) Then I power off the tape unit and attach a new unit (attach scsi cable, power cable, then power on the unit). # camcontrol tur sa0 -E -C 4 -v error sending test unit ready: Device not configured (pass2:asr0:1:6:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 (pass2:asr0:1:6:0): CAM Status: CCB request is in progress /var/log/messages got the following 2 lines as soon as I launched camcontrol: Apr 26 15:32:27 name kernel: (sa0:asr0:1:6:0): lost device Apr 26 15:32:27 name kernel: (sa0:asr0:1:6:0): removing device entry # camcontrol rescan pass2 Re-scan of bus 0 was successful This is a problem as the tape drive (pass2) was on bus 1. Granted, pass2 was pointing to sa0:asr0:1:6:0 and the device that is now attached is connected via asr0:1:0:0. adamu010# camcontrol rescan all Re-scan of bus 0 was successful Re-scan of bus 1 was successful # camcontrol devlist at scbus0 target 0 lun 0 (da0,pass0) at scbus0 target 6 lun 0 (ses0,pass1) # camcontrol rescan 1:0:0 Re-scan of 1:0:0 was successful # camcontrol devlist at scbus0 target 0 lun 0 (da0,pass0) at scbus0 target 6 lun 0 (ses0,pass1) # camcontrol reset 1 Reset of bus 1 was successful # camcontrol rescan 1 Re-scan of bus 1 was successful # camcontrol devlist 1 at scbus0 target 0 lun 0 (da0,pass0) at scbus0 target 6 lun 0 (ses0,pass1) The tape drive is not detected without a reboot. Despite the fine man page for camcontrol and several examples provided by google of other users using camcontrol to successfully reattach devices, I cannot do it. I assume I have done something wrong, like misunderstanding how scsi devices and/or termination function. Can anyone point out what I am doing wrong and/or tell me how to change tape drives without rebooting my box? Thank you for any help! Adam ps: Please CC me as I am not subscribed to this list. TIA!