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From: John Capo <jc@irbs.com>
Message-Id: <199506181956.PAA16285@irbs.irbs.com>
Subject: Re: Retensioning tapes with mt
To: awebster@dataradio.com (Andrew Webster)
Date: Sun, 18 Jun 1995 15:56:35 -0400 (EDT)
Cc: freebsd-questions@freebsd.org
In-Reply-To: <199506141937.PAA12555@vhf.dataradio.com> from "Andrew Webster" at Jun 14, 95 03:38:27 pm
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Andrew Webster writes:
> 
> I can't seem to find away to retension my tapes in an Archive 5252S drive
> connected to AHA-1542CF on 2.0-RELEASE.  Is there another command besides
> mt that must be used to do this?
> 

Here are my patches to add re-tensioning.

-- 
John Capo


*** sys/scsi/st.c.orig	Sun Apr  9 16:29:50 1995
--- sys/scsi/st.c	Sun Apr  9 16:40:47 1995
***************
*** 1237,1242 ****
--- 1237,1247 ----
  			case MTCOMP:	/* enable default compression */
  				errcode = st_comp(unit,number);
  				break;
+ 
+ 			case MTRETEN:    /* Re-tension tape */
+ 				errcode = st_load(unit, LD_RETEN, 0);
+ 				break;
+ 
  			default:
  				errcode = EINVAL;
  			}
*** usr.bin/mt/mt.1.orig	Sun Apr  9 16:45:09 1995
--- usr.bin/mt/mt.1	Sun Apr  9 17:07:38 1995
***************
*** 89,94 ****
--- 89,97 ----
  .It Cm erase
  Erase the tape
  (Count is ignored).
+ .It Cm retension
+ Re-tension the tape
+ (Count is ignored).
  .It Cm status
  Print status information about the tape unit.
  .El
*** sys/sys/mtio.h.orig	Sun Apr  9 16:28:26 1995
--- sys/sys/mtio.h	Sun Apr  9 16:29:30 1995
***************
*** 79,84 ****
--- 79,85 ----
  #define MTERASE		12	/* erase to EOM */
  #define MTEOD		13	/* Space to EOM *//* lost the code for this */
  #define MTCOMP		14	/* select compression mode 0=off, 1=def */
+ #define MTRETEN		15	/* retension tape */
  
  #endif
  
*** usr.bin/mt/mt.c.orig	Tue Apr 18 22:54:19 1995
--- usr.bin/mt/mt.c	Sat Apr 22 10:51:53 1995
***************
*** 87,92 ****
--- 87,93 ----
  	{ "density",	MTSETDNSTY, 0, NEED_2ARGS|ZERO_ALLOWED|IS_DENSITY },
  	{ "eom",	MTEOD, 1 },
  	{ "comp",	MTCOMP, 0, NEED_2ARGS|ZERO_ALLOWED },
+         { "retension",  MTRETEN, 1 },
  #endif /* defined(__FreeBSD__) */
  	{ NULL }
  };