From owner-freebsd-questions Fri Apr 14 09:28:38 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id JAA23788 for questions-outgoing; Fri, 14 Apr 1995 09:28:38 -0700 Received: from estienne.cs.berkeley.edu (estienne.CS.Berkeley.EDU [128.32.42.147]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id JAA23782 for ; Fri, 14 Apr 1995 09:28:37 -0700 Received: from localhost (localhost [127.0.0.1]) by estienne.cs.berkeley.edu (8.6.11/8.6.9) with SMTP id JAA02525; Fri, 14 Apr 1995 09:28:27 -0700 Message-Id: <199504141628.JAA02525@estienne.cs.berkeley.edu> X-Authentication-Warning: estienne.cs.berkeley.edu: Host localhost didn't use HELO protocol To: Bob Dunaway cc: freebsd-questions@FreeBSD.org Subject: Re: Archive DAT SCSI problem In-reply-to: Your message of "Thu, 13 Apr 1995 21:32:43 CDT." <199504140232.VAA13666@rdsw.com> Date: Fri, 14 Apr 1995 09:28:27 -0700 From: "Justin T. Gibbs" Sender: questions-owner@FreeBSD.org Precedence: bulk >I have recently brought up a system with FreeBSD on a 486DX2/66 and >am very happy with the system except for a SCSI tape problem. >I have been having problems adding an Archive Python 25501-xxx DAT tape >drive to the 950322-SNAP release of FreeBSD. I am using the Adaptec 2842A >controller. The system locks up when booting with the tape drive connected. > >ahc1: reading board settings >ahc1: 284x Single Channel, SCSI Id=7, aic7770 >= Rev E, 16 SCBs >ahc1: Downloading Sequencer Program...Done >ahc1 at 0x1000-0x10ff irq 11 on eisa slot 1 >ahc1: Probing channel A >ahc1 waiting for scsi devices to settle >ahc1: target 0 synchronous at 10.0MB/s, offset = 0x19 >(ahc1:0:0): "HP C2490A-300 4140" is a type 0 fixed SCSI 2 >sd0(ahc1:0:0): Direct-Access 2033MB (4165272 512 byte sectors) >ahc1: target 6 synchronous at 10.0MB/s, offset = 0x42 > >The system hangs at this point with the disk controller access light on. >I rebuilt the kernel with the NEW_SCSICONF option and also added a >table entry for the Archive drive using the parameters of the Wangdat >DAT drive. I then tried the SCSI_2_DEF option. Neither of these options >made any difference. I then tried the SCSIDEBUG option to determine >where the boot was failing. The boot was successful and I was able to >write a tar tape and read it successfully (with a lot of debug messages). >Apparently, the problem is related to timing to the Archive tape drive. >The last thing which I have tried was the new aic sequencer code and >driver. The system still locks up at the same place during boot (no debug). >Does anyone have any suggestions for resolving this problem. The dmesg output came from the -current aic7xxx driver? Just to make sure, can you try the 4/12 SNAP snapshot disks out (incase you didn't grab all of the required files). If this is the -current code, it looks like a syncronous negotiation problem. We should never allow negotiation above 15. > >Thanks >bob@rdsw.com -- Justin T. Gibbs ============================================== TCS Instructional Group - Programmer/Analyst 1 Cory | Po | Danube | Volga | Parker | Torus ==============================================