Date: Wed, 2 Jun 1999 08:05:06 +0200 From: J Wunsch <j@uriah.heep.sax.de> To: nclayton@lehman.com Cc: scsi@FreeBSD.ORG Subject: Re: Tapes written on 2.2.8 not readable on 3.2 (was Re: PR docs/6681) Message-ID: <19990602080506.38306@uriah.heep.sax.de> In-Reply-To: <19990601095207.S22307@lehman.com>; from nclayton@lehman.com on Tue, Jun 01, 1999 at 09:52:07AM %2B0100 References: <19990531090735.Q22307@lehman.com> <199905312210.WAA04171@jhs.muc.de> <19990601095207.S22307@lehman.com>
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As nclayton@lehman.com wrote: > > Seems to me on brief experiment, > > 3.2 can write data that 2.2.8 can read, > > but 2.2.8 tapes are not readable on 3.2 system > > (a disaster for anyone relying on backup tapes (not me thankfully)). I think that's the well-known problem (*) that the defaults of 3.x and -current differ for some tape drives, for whatever reason. In particular, the current driver doesn't trust the user ;-) to default to variable mode for QIC > 150, as the pre-CAM tape driver did. Thus, tapes written in variable mode previously aren't readable by default. However, the world is not that bad, the old tapes are readable without problems if you use `mt blocksize variable' before reading them. At least, i haven't seen a tape so far i could not read that had been written with the old system. (*) Examining the archive of this list for the subject `tape' should reveal you a number of threads discussing it. -- 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. ;-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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