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To: questions@FreeBSD.ORG
Subject: TEAC MT-2ST problem solved
Reply-To: gkshenaut@ucdavis.edu
Date: Thu, 12 Mar 1998 16:52:35 -0800
From: Greg Shenaut <greg@bogslab.ucdavis.edu>
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I recently tried using my TEAC MT-2ST tapedrives
with FBSD2.2.5 and it messed up.  I hacked around
a bit and made these changes:

To scsi/scsiconf.h, I added three lines
after the line containing "#define QIC_3080	0x29"

#define TEAC_8		0x08	/* mt2st */
#define TEAC_88		0x88	/* mt2st */
#define TEAC_A8		0xA8	/* mt2st */

To scsi/scsiconf.c, I added these seven lines
before the line containing "static st_modes mode_unktape ="

static st_modes mode_teac =
	{
	    {512, ST_Q_FORCE_FIXED_MODE, 0},		/* minor 0,1,2,3 */
	    {512, ST_Q_FORCE_FIXED_MODE, TEAC_8},	/* minor 4,5,6,7 */
	    {512, ST_Q_FORCE_FIXED_MODE, TEAC_88},	/* minor 8,9,10,11 */
	    {512, ST_Q_FORCE_FIXED_MODE, TEAC_A8}	/* minor 12,13,14,15 */
	};

and then later in scsi/scsiconf.c, these additional eight lines to the
knowndevs array, at the end of the "#if NST > 0 ... #endif /* NST */" block

	{
		T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "TEAC", "MT-2ST/N*", "*",
		"st", SC_ONE_LU, ST_Q_FORCE_FIXED_MODE|ST_Q_NO_1024|ST_Q_IGNORE_LOADS, mode_teac
	},
	{
		T_SEQUENTIAL, T_SEQUENTIAL, T_REMOV, "TEAC", "MT-2ST/F*", "*",
		"st", SC_ONE_LU, ST_Q_FORCE_FIXED_MODE|ST_Q_NO_1024, mode_teac
	},

After light testing, these appear to work.  I'm sending these changes
to the list because I want to document them for the archives (so someone
else can use them); however, it would be even better if whoever maintains
the scsi code added them to the source tree.

-Greg

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