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
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