Date: Fri, 23 Jun 1995 00:43:00 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: roberto@keltia.freenix.fr Cc: freebsd-bugs@FreeBSD.org Subject: Re: Pb with some tapes Message-ID: <199506222243.AAA26335@uriah.heep.sax.de> In-Reply-To: <199506221920.VAA08206@keltia.frmug.fr.net> from "Ollivier Robert" at Jun 22, 95 09:20:39 pm
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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. ;-)
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