From owner-freebsd-questions Thu Apr 13 19:32:01 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id TAA05818 for questions-outgoing; Thu, 13 Apr 1995 19:32:01 -0700 Received: from rdsw.com (rdsw.com [198.211.39.70]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id TAA05808 for ; Thu, 13 Apr 1995 19:31:53 -0700 Received: (from bob@localhost) by rdsw.com (8.6.11/8.6.9) id VAA13666 for freebsd-questions@FreeBSD.org; Thu, 13 Apr 1995 21:32:44 -0500 From: Bob Dunaway Message-Id: <199504140232.VAA13666@rdsw.com> Subject: Archive DAT SCSI problem To: freebsd-questions@FreeBSD.org Date: Thu, 13 Apr 1995 21:32:43 -0500 (CDT) X-Mailer: ELM [version 2.4 PL24] Content-Type: text Content-Length: 1622 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. Thanks bob@rdsw.com