From owner-freebsd-bugs Thu Jun 22 21:24:23 1995 Return-Path: bugs-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id VAA19328 for bugs-outgoing; Thu, 22 Jun 1995 21:24:23 -0700 Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id VAA19322 for ; Thu, 22 Jun 1995 21:24:20 -0700 Received: from sax.sax.de by irz301.inf.tu-dresden.de with SMTP (5.67b+/DEC-Ultrix/4.3) id AA10720; Fri, 23 Jun 1995 06:24:15 +0200 Received: by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id GAA08343; Fri, 23 Jun 1995 06:24:15 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.6.11/8.6.9) id AAA26335; Fri, 23 Jun 1995 00:43:01 +0200 From: J Wunsch Message-Id: <199506222243.AAA26335@uriah.heep.sax.de> Subject: Re: Pb with some tapes To: roberto@keltia.freenix.fr Date: Fri, 23 Jun 1995 00:43:00 +0200 (MET DST) Cc: freebsd-bugs@FreeBSD.org In-Reply-To: <199506221920.VAA08206@keltia.frmug.fr.net> from "Ollivier Robert" at Jun 22, 95 09:20:39 pm Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Length: 1308 Sender: bugs-owner@FreeBSD.org Precedence: bulk As Ollivier Robert wrote: > > I have a problem with some tapes produced with a 60 MB tape drive > (Archive). I don't have the exact model but I guess it is a 2060S. > To resume, dealing with 60 MB works the first time (on /dev/rst0) but not > afterward. When dealing with multiple filesets per tape, it also fails > unless one use the /dev/nrst0 (I know I should use it but I typed /dev/rst0 > by mistake and the problem first appeared). Same happens for any Tandberg QIC drive, but e.g. not for an Archive Viper 150S. I've never digged into the error condition returned by the Tandberg. Interestingly, reading back and forth on the non-rewind device does work, even with intermittent ``mt rewind'' commands, but any ``mt rewoffl'' command is treated like closing the rewind device and will result in an IO error on next access. The error condition is always being cleared by opening and closing the drive door. Btw., i've seen the SCSI tape driver from Data General's DG/UX. Be assured, our Rogue's Gallery is a rather nice hack compared to their drive-dependant kludges. Handling SCSI tapes seems to be a rather non-trivial task, alas. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)