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List:       classiccmp
Subject:    Re: Introduction
From:       Oliver Lehmann <lehmann () ans-netz ! de>
Date:       2008-06-01 19:33:22
Message-ID: 20080601213322.4be7fe1b.lehmann () ans-netz ! de
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Oliver Lehmann wrote:

> dwight elvey wrote:
> 
> > Hi
> >  I looked it up. If the pulse for the step is less than 0.5ms it assume
> > the buffered or auto step. I was confusing compensation with the
> > head selects that also change with the ST412 standard.
> > Dwight
> 
> Do you know if this changed between ST251(-0) and ST251-1? Because -0
> drives are working but very hard to find - -1 are easier to find.

btw. I can configure something like "ramp mode" for my controller for
different preconfigured harddisk types or set it by hand - could that be
the "auto setting" you are talking about?

Example configuration for a Microscience HH-1090 disk with the config
utilty:

List of Drive-Parameters:
|No.|  Name      |  cyls; hds; secs; prae; ramp;
-----------------------------------------------
| 1 |NEC D5126   |  615; 4; 18; 128; 12;
| 2 |NEC D5146   |  615; 8; 18; 128; 12;
| 3 |ROBOTRON VS |  820; 6; 18; 820; 1;
| 4 |ROB K5504.50|  1024; 5; 18; 1024; 1;
-----------------------------------------------
Which Typ ? (No./n/q) n
PAR --- Drivetype: '            '
PAR --- Cylinders: 100  Heads: 2  Sectors: 18  Praecomp: 100  Ramp: 1
Parameter for Drive ok ? (y/l/p/q)p
Parameters: b(Drivetype(ASCII))
            c(Number of Cylinders)  h(Number of Heads)
            s(Number of Sectors)    p(Begin Cylinder of Praecompensation)
            r(Distance of Cylinders for Ramp Mode)
            e (End of Input)   q (Jump to the End of 'sa.format')
Parameter: (b/c/h/s/p/r)value,e,q bHH-1090
Parameter: (b/c/h/s/p/r)value,e,q c1314
Parameter: (b/c/h/s/p/r)value,e,q h7
Parameter: (b/c/h/s/p/r)value,e,q s18
Parameter: (b/c/h/s/p/r)value,e,q p1314
Parameter: (b/c/h/s/p/r)value,e,q r1
Parameter: (b/c/h/s/p/r)value,e,q e

as you can see there is an option "Distance of Cylinders for Ramp Mode"

-- 
 Oliver Lehmann
  http://www.pofo.de/
  http://wishlist.ans-netz.de/
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