Date: Tue, 19 Mar 1996 14:42:26 +0100 From: se@zpr.uni-koeln.de (Stefan Esser) To: Greg Lehey <grog@freefall.freebsd.org> Cc: questions@freebsd.org Subject: Re: HP 35480A help needed Message-ID: <199603191342.AA19508@Sisyphos> In-Reply-To: Greg Lehey <grog@freefall.freebsd.org> "Re: HP 35480A help needed" (Mar 19, 5:31)
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On Mar 19, 5:31, Greg Lehey wrote: } Subject: Re: HP 35480A help needed } To the best of my knowledge, the MRS code is in three small holes on } the underside of the cartridge. DAT tapes, and also older DDS tapes, } don't have the holes (there is a recess about 0.5mm deep to show where } they are, but that's all. The real holes are deeper than you can see, } at least 3 mm). No, MRS uses a tape header with a certain pattern of vertical stripes. } Older HP drives would accept uncoded cassettes, but it looks like } newer ones don't. The result is that I can't read my own old, } original HP cartridges. The new HP drives can be made to accept the old cartridges. They got a switch to disable MRS ... } > If they are true DDS DAT tapes, then you can } > disable MRS and this way enable writing onto } > those tapes ... } > } > MRS was designed to protect against erronous } > writing on Audio DAT tapes ;-) } } Of course, they also prevent deliberate writing on audio DAT tapes. } How do you disable it? It is switch 3 on the 8 switch block on an HP C1533A, AFAIK. I have kept a posting to the "comp.periphs.scsi" news group, and I'll send it to freebsd-scsi, since I got several requests for that information meanwhile ... Regards, STefan -- Stefan Esser, Zentrum fuer Paralleles Rechnen Tel: +49 221 4706021 Universitaet zu Koeln, Weyertal 80, 50931 Koeln FAX: +49 221 4705160 ============================================================================== http://www.zpr.uni-koeln.de/~se <se@ZPR.Uni-Koeln.DE>
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