Hi Vrondi:
You wrote:
> So, Any thing anyone can explain to me about the
> Seagate ST-225 Hard Drive would be wonderful. Thanks.
This is one of the most common drives you are likely to
encounter on older machines. (it's _my_ favourite) They
work really well and don't quit easily. You will find
these drives still in use. The encoding is MFM and there
is a premium model (closer tolerences) which can be
formatted to RLL. Ofcourse you can do that to the ST-225
as well (try it as a learning experience) but you will get
too many errors. I used to come across these in machines
which were puported to not work. Hehe, what they didn't
know is that you have to low level format them as part of
a maintenance schedule. Usually, these supposedly non
working drives are perfectly good. It's water under the
bridge now as we can usually get good IDE drives for
nothing which are much faster and less noisy.
So: down to the nitty gritty .....
21 megabytes
4 heads
615 Cylinders
17 Sectors
Access time is about 65ms ... so don't hold your breath.
The jumper settings are easy: the pins nearest the narrow
cable are junpered for drive select 1.... the next one
over toward the wide cable is 2, and so on.
Hmm, what else would one need to know?
I suppose you know how to format these beasties? If not,
here it is. You need an RLL controller card, remember this
is before they put the card on the disk and called it IDE.
The drive bios is on that card, so once it is formatted
using that card, it may not run on another card without
re-formatting.
Unlike IDE drives, you have to first do a low level
format. The routine for this is on the controller card.
You run the program using debug. Like this:
debug
-g=c800:6
- do whatever it says <g>
Depending on the bios, it will ask you stuff like
interleave (use default) and precompensation (use 300 to
614). You may also encounter another address. If c800:6
doesn't work, try c800:5 or c800:ccc.
Oh, yeah ... (you got me going now) hehe....
Format it at the temperature and physical orientation
you plan to use it at. This makes a difference in the long
run. Anyways, I better stop before it starts to bore other
people who have (less interesting) IDE drives. <G>
Cheers,
Ole Juul
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