From owner-freebsd-scsi  Wed Jun 23  9:37:48 1999
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Date: Wed, 23 Jun 1999 09:32:18 -0700 (PDT)
From: Matthew Jacob <mjacob@feral.com>
Reply-To: mjacob@feral.com
To: Christian Weisgerber <naddy@mips.rhein-neckar.de>
Cc: freebsd-scsi@FreeBSD.ORG
Subject: Re: Tape drive drops into state of refusal
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It doesn't like variable mode with the tape you inserted. Set it to fixed
mode via the mt command.

On 23 Jun 1999, Christian Weisgerber wrote:

> Today, after a successful backup, my tape drive decided to refuse any
> further read/write commands.
> 
> 4.0-CURRENT (May 29).
> 
> sa0 at ncr0 bus 0 target 6 lun 0
> sa0: <WANGTEK 51000 SCSI RVM7 5F5> Removable Sequential Access SCSI-CCS device
> sa0: 3.300MB/s transfers
> 
> Quirk entry:
> 
> {
>  { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
>    "51000*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_1FM, 0
> }
> 
> (Yes, this is slightly modified from the one currently in the tree.)
> 
> The tape drive works.
> Today, after a successful backup with dump, I inserted a new tape, and
> any attempts to write data to the drive produced only this:
> 
> (sa0:ncr0:0:6:0): WRITE(06). CDB: a 0 0 28 0 0
> (sa0:ncr0:0:6:0): ILLEGAL REQUEST csi:0,8,0,0
> 
> A read attempt didn't fare any better:
> 
> (sa0:ncr0:0:6:0): READ(06). CDB: 8 0 1 0 0 0
> (sa0:ncr0:0:6:0): ILLEGAL REQUEST csi:0,8,0,0
> 
> # camcontrol reset 0:6:0
> Reset of 0:6:0 returned error 0x6
> 
> And the problem persisted. Removing and reinserting the tape or another
> tape didn't help either. Rebooting did. :-(
> 
> 
> (Damn. For ten years SCSI has been pretty much plug and play for me. But
> ever since I put that tape drive into the FreeBSD box I get the
> impression I should have a copy of the SCSI specs on my desk.)





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