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Date:      Wed, 06 May 1998 09:40:28 -0700
From:      Kevin McQuiggin <mcquiggi@sfu.ca>
To:        freebsd-scsi@FreeBSD.ORG
Subject:   Problem with Wangtek 5150ES SCSI Tape
Message-ID:  <3.0.5.32.19980506094028.007b1780@mail.sfu.ca>

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>X-Sender: mcquiggi@ferrari.sfu.ca
>X-Mailer: Windows Eudora Light Version 3.0.1 (32)
>Date: Tue, 05 May 1998 22:33:05 -0700
>To: questions@FreeBSD.ORG
>From: Kevin McQuiggin <mcquiggi@sfu.ca>
>Subject: Problem with Wangtek 5150ES SCSI Tape
>Sender: owner-freebsd-questions@FreeBSD.ORG
>X-Loop: FreeBSD.ORG
>
>Hi:
>
>I'm having a problem with my new (well new to me) SCSI tape. My tape drive
>is as follows:
>
>(from dmesg:)
>
>(bt0:5:0): "WANGTEK 5150ES SCSI ES41 B170" type 1 removable SCSI 1
>st0(bt0:5:0): Sequential-Access density code 0x5, 512-byte blocks,
>write-enable
>
>or if empty:
>
>(bt0:5:0): "WANGTEK 5150ES SCSI ES41 B170" type 1 removable SCSI 1
>st0(bt0:5:0): Sequential-Access density code 0x10,  drive empty            
>
>and when I try to write to the drive I observe:
>
># mt status
>Present Mode:   Density = X3.136-1986  Blocksize = 512 bytes
>---------available modes---------
>Mode 0:         Density = 0x00         Blocksize variable
>Mode 1:         Density = X3.136-1986  Blocksize = 512 bytes
>Mode 2:         Density = X3.39-1986   Blocksize variable
>Mode 3:         Density = X3.54-1986   Blocksize variable
># dd if=/kernel of=/dev/rst0
>dd: /dev/rst0: Invalid argument
>1+0 records in
>0+0 records out
>0 bytes transferred in 0.016702 secs (0 bytes/sec)
># tar cvf /dev/rst0 /usr/sbin
>tar: Removing leading / from absolute path names in the archive.
>usr/sbin/
>usr/sbin/uuchk
>tar: can't write to /dev/rst0 : Invalid argument
>#
>   
>
>and this is generated on the console:
>
>st0(bt0:5:0): ILLEGAL REQUEST csi:0,8,0,0
>st0(bt0:5:0): ILLEGAL REQUEST csi:0,8,0,0
>st0(bt0:5:0): ILLEGAL REQUEST csi:0,8,0,0
>st0(bt0:5:0): ILLEGAL REQUEST csi:0,8,0,0
>st0(bt0:5:0): ILLEGAL REQUEST csi:0,8,0,0
>st0(bt0:5:0): ILLEGAL REQUEST csi:0,8,0,0
>   
>
>But mt erase seems to work. At least the tape runs for quite awhile.
>
>My question: why is this happening? Could it be a media problem? The tapes
>were previously used with a lower density Wangtek (and Archive) drive on a
>Sun 3/60. 
>
>I have tried using mt density to reset the density to different values, but
>this makes no difference.
>
>Any assistance appreciated. I've already searched the FAQ, Handbook, and
>mailing list archives.
>
>Kevin
>
>
>---
>Kevin McQuiggin VE7ZD
>mcquiggi@sfu.ca
>
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>


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