Date: Mon, 1 Oct 2001 10:40:43 +0930 From: Greg Lehey <grog@FreeBSD.org> To: "Derrick T. Woolworth" <coeus@servetheweb.com>, Stephen Hovey <shovey@buffnet.net> Cc: freebsd-questions@freebsd.org Subject: Re: Tape Media Problems Message-ID: <20011001104043.A31215@wantadilla.lemis.com> In-Reply-To: <5.1.0.14.2.20010927152316.02bc8938@mail.rndassociates.com>; from coeus@servetheweb.com on Thu, Sep 27, 2001 at 03:56:51PM -0500 References: <5.1.0.14.2.20010927152316.02bc8938@mail.rndassociates.com> <Pine.BSF.4.05.10109271703050.21794-100000@buffnet11.buffnet.net> <5.1.0.14.2.20010927152316.02bc8938@mail.rndassociates.com>
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On Thursday, 27 September 2001 at 15:56:51 -0500, Derrick T. Woolworth wrote:
> I have a Tekram DC395U SCSI Adapter and a Seagate DAT DDS-4 06240-XXX 8040.
>
> When I attempt to write a tape block identifier to the first block I get an
> i/o error.
>
> mt: /dev/nsa0: Input/output error
>
> or sometimes
>
> mt: /dev/nsa0: Device not configured
>
> And the same when I attempt to mt fsf 1
>
> Running tar cf /dev/rsa0
>
> (sa0:tekram_trm0:0:2:0): unable to set fixed blocksize to 1024
> (sa0:tekram_trm0:0:2:0): failed to write terminating filemark(s)
> (sa0:tekram_trm0:0:2:0): tape is now frozen- use an OFFLINE, REWIND or
> MTEOM command to clear this state.
>
> It seems to write a couple of blocks of data and then exits with a broken
> pipe and fails.
>
> Anyone have any ideas?
Looks like your drive doesn't support some block sizes. I have a Sony
DDS-4 drive like this; experiment with dd to find the minimum
blocksize. I'm surprised it won't take 1024 bytes, though.
On Thursday, 27 September 2001 at 17:05:15 -0400, Stephen Hovey wrote:
>
> Ive had troubles with dat drives if:
>
> the wrong tape type is put in (make sure the dds-4 get appropriate tapes)
No, this isn't a problem. Pre-written DDS{<4} might be, though.
> The scsi chain isnt terminated right (at the end and only at the end
> of the physical, not logical chain).
You'll have trouble with all SCSI devices if the chain isn't correctly
terminated, but that's not the case here.
Greg
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