Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!ucsd!rutgers!cbmvax!andy
From: andy@cbmvax.commodore.com (Andy Finkel)
Newsgroups: comp.sys.amiga
Subject: Re: AmigaOS 2.0 still clicks the floppies!
Message-ID: <11471@cbmvax.commodore.com>
Date: 9 May 90 15:46:06 GMT
References: <11271@shlump.nac.dec.com> <29725@cup.portal.com> <29754@cup.portal.com>
Reply-To: andy@cbmvax (Andy Finkel)
Organization: Commodore, West Chester, PA
Lines: 64

In article <29754@cup.portal.com> thad@cup.portal.com (Thad P Floryan) writes:
>{Re: AmigaOS 2.0 still clicks the floppies!}
>For a computer to be perceived as "desirable", it must use reliable AND
>quality components.  CBM's new 1-year warranty is a GOOD sign, but clicking
>disk drives are NOT.  I will be checking out an A3000 after-hours at a local
>dealer to verify the alleged clicking problem.  If it clicks AND if there's no
>simple SOFTWARE solution, then it's clear what computer I will NOT buy and
>cannot recommend.


The trackdisk.device supports a no click mode, on a unit by unit basis.
It's in there, in other words.  It's a simple matter to twiddle the bit.
Maybe someday there will be a preferences editor for it :-)

The reason this isn't the default is we identified a number of drives
who don't have a track zero stop.  (no, no names)
So we put the no click capability in, but leave it to the individual to try 
it with his/her drives. 


The trackdisk unit structure for 2.0 has a number of other fields for
people who enjoy abusing their drives by making them run at
spec or beyond...

/*
 *--------------------------------------------------------------------
 *
 * public portion of the unit structure
 *
 *--------------------------------------------------------------------
 */
      
      struct TDU_PublicUnit {
              struct  Unit tdu_Unit;          /* base message port */
              UWORD   tdu_Comp01Track;        /* track for first precomp */
              UWORD   tdu_Comp10Track;        /* track for second precomp */
              UWORD   tdu_Comp11Track;        /* track for third precomp */
              ULONG   tdu_StepDelay;          /* time to wait after stepping */
              ULONG   tdu_SettleDelay;        /* time to wait after seeking */
              UBYTE   tdu_RetryCnt;           /* # of times to retry */
              UBYTE   tdu_PubFlags;           /* public flags, see below */
              UWORD   tdu_CurrTrk;            /* track the heads are over... */
                                              /* ONLY ACCESS WHILE UNIT IS STOPPED! */
              ULONG   tdu_CalibrateDelay;     /* time to wait after stepping */
                                              /* during a recalibrate */
              ULONG   tdu_Counter;            /* counter for disk changes... */
                                              /* ONLY ACCESS WHILE UNIT IS STOPPED! */
      };
      
      /* flags for tdu_PubFlags */
      #define TDPB_NOCLICK    0
      #define TDPF_NOCLICK    (1L << 0)
      
>Thad Floryan [ thad@cup.portal.com (OR) ..!sun!portal!cup.portal.com!thad ]

			andy
-- 
andy finkel		{uunet|rutgers|amiga}!cbmvax!andy
Commodore-Amiga, Inc.

"Not everything worth doing is worth doing well."

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