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From: grog@lemis.de (Greg Lehey)
Organisation: LEMIS, Schellnhausen 2, 36325 Feldatal, Germany
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Reply-To: grog@lemis.de (Greg Lehey)
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Subject: Re: Problems with SCSI DDS driver?
To: phk@critter.tfs.com (Poul-Henning Kamp)
Date: Tue, 2 Jan 1996 10:47:08 +0100 (MET)
Cc: hackers@freebsd.org (FreeBSD Hackers)
In-Reply-To: <7608.820575115@critter.tfs.com> from "Poul-Henning Kamp" at Jan 2, 96 10:31:55 am
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Poul-Henning Kamp writes:
>
>>>> Dec 31 19:04:02 freebie /kernel: st0(aha0:2:0): DATA PROTECT asc:30,0 Inco
> mpatible medium installed
>>>>
>>> I have the same problem with the same hardware.
>>>
>>> (ahb0:5:0): "HP HP35480A 1009" type 1 removable SCSI 2
>>> st0(ahb0:5:0): Sequential-Access density code 0x13,  drive empty
>>
>> HP DAT drives have a feature called MRS (Media Recognition System) to
>> detect MRS compatible and certified media. This is dip-switch selectable,
>> if switched on, my manual says: "The MRS is active. This is the default.
>> Non-MRS Tapes are treated as if they were write protected."
>
> Or possibly audio tapes...

I'm assuming that the code 000 is the audio tape code; that's what my
audio tapes have.  The 60m tape I have is also about 5 years old, and
may not have the correct coding.  But that's only part of the problem:
both these tapes work perfectly on the same hardware with BSD/386, so
if it needs to be disabled, BSD/386 knows how to do it.  I'll have a
look through the code.  Do we have any SCSI bus trace facility?

Greg