From owner-freebsd-scsi Tue Dec 9 13:29:37 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id NAA07470 for freebsd-scsi-outgoing; Tue, 9 Dec 1997 13:29:37 -0800 (PST) (envelope-from owner-freebsd-scsi) Received: from vina-tech.com (vina-tech.com [207.242.96.1]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id NAA07462 for ; Tue, 9 Dec 1997 13:29:35 -0800 (PST) (envelope-from scott.watters@vina-tech.com) Received: from curious (curious.vina-tech.com [207.242.96.69]) by vina-tech.com (8.8.7/8.8.7) with SMTP id NAA25885 for ; Tue, 9 Dec 1997 13:28:11 -0800 (PST) (envelope-from scott.watters@vina-tech.com) Message-ID: <007601bd04e9$48a33af0$4560f2cf@curious.vina-tech.com> Reply-To: "Scott Watters" From: "Scott Watters" To: Subject: Re: Questions about mt and SCSI subsystem Date: Tue, 9 Dec 1997 13:27:42 -0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.2106.4 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4 Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >As David O'Brien wrote: > >> > Dec 3 17:42:14 newserver /kernel: st0(ahc0:6:0): BLANK CHECK req sz: 1 >> > (decimal) asc:0,5 End-of-data detected >> >> Probably the same bug that keeps ``dump 0a'' from working. > >At least a related one, but not the same. >-- >cheers, J"org > >joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE >Never trust an operating system you don't have sources for. ;-) I did a ktrace on mt and discovered that the driver was NOT returning an error on the fsf IOCTL. It looks like a driver problem. I've been looking at the sources, but the EOM logic escapes me. Has anyone else played with/patched this code? I know the logic is complex due to asychronous IO and early returns. But I can't see the forest for the trees. Thanks, Scott Watters scott.watters@vina-tech.com http://www.vina-tech.com