🚀 go-pugleaf

In article <1992Nov16.103443.42555@urz.unibas.ch> gaspar@urz.unibas.ch writes:
>As far as I can remember, the biggest harddisc size you could use with a
>Archimedes 410/1 was around 50 Meg. under RISC OS 2.

You can use most drives up to around 80Megs quite easily, though for drives
bigger than 50Megs you have to swap a link (to change sector size I think).

Cheers

Bob
-- 
  Robert J. Voisey  :  r_voisey@csd.uwe.ac.uk
         -- Probug Software Developments --
162 Staplehill Rd, Fishponds, Bristol, Avon, England

In article <1992Nov17.105656.22343@csd.uwe.ac.uk>, r_voisey@csd.uwe.ac.uk (R Voisey) writes:
> In article <1992Nov16.103443.42555@urz.unibas.ch> gaspar@urz.unibas.ch writes:
>>As far as I can remember, the biggest harddisc size you could use with a
>>Archimedes 410/1 was around 50 Meg. under RISC OS 2.
> 
> You can use most drives up to around 80Megs quite easily, though for drives
> bigger than 50Megs you have to swap a link (to change sector size I think).
                               / ^^^^^^^^^^^
Could someone tell me what this means? 
I bought a second hand 80Meg Harddisk quite cheap. The problem is that it has
9 heads and when I enter that parameter I get a message that I might! 
swap link 3 or something like that.
I'd be very happy if someone could enlighten me on that subject.


> Cheers
> 
> Bob
> -- 
>   Robert J. Voisey  :  r_voisey@csd.uwe.ac.uk
>          -- Probug Software Developments --
> 162 Staplehill Rd, Fishponds, Bristol, Avon, England
-- 

THanks
          laci
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*             Laci Gaspar, University Basel, Switzerland                      *
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In article <1992Nov17.180524.42564@urz.unibas.ch>, gaspar@urz.unibas.ch writes:

|> > bigger than 50Megs you have to swap a link (to change sector size I think).
|>                                / ^^^^^^^^^^^
|> Could someone tell me what this means? 

|> 9 heads and when I enter that parameter I get a message that I might! 
|> swap link 3 or something like that.

On the Archimedes motherboard there are a number of links, consisting of
small plastic jumpers which bridge two upright metal pins.  These can be
set (jumper attached) or unset (jumper removed).  Sometimes there are 3
vertical pins, and the jumper can bridge the middle pin to either of the
other two (but not both at once).  Jumpers are identified by the letter
J followed by a number - this will be printed onto the PCB next to each
jumper.  So, if you want to swap link 3 you have to take the lid off your
machine, and find J3.  If it's a two-pin link, and it's currently set,
then remove the jumper.  If it's two-pin and unset, then obtain a jumper
and attach it.  If it's a three-pin link, then swap the position of the
jumper.

Hope that helps

Bob

-- 
  Robert J. Voisey  :  r_voisey@csd.uwe.ac.uk
         -- Probug Software Developments --
162 Staplehill Rd, Fishponds, Bristol, Avon, England

In article <1992Nov17.180524.42564@urz.unibas.ch>, gaspar@urz.unibas.ch writes:
 > In article <1992Nov17.105656.22343@csd.uwe.ac.uk>, r_voisey@csd.uwe.ac.uk (R Voisey) writes:
 > > In article <1992Nov16.103443.42555@urz.unibas.ch> gaspar@urz.unibas.ch writes:
 > >>As far as I can remember, the biggest harddisc size you could use with a
 > >>Archimedes 410/1 was around 50 Meg. under RISC OS 2.
 > > 
 > > You can use most drives up to around 80Megs quite easily, though for drives
 > > bigger than 50Megs you have to swap a link (to change sector size I think).
 >                                / ^^^^^^^^^^^
 > Could someone tell me what this means? 
 > I bought a second hand 80Meg Harddisk quite cheap. The problem is that it has
 > 9 heads and when I enter that parameter I get a message that I might! 
 > swap link 3 or something like that.
 > I'd be very happy if someone could enlighten me on that subject.
 > 
 > 
 > > Cheers
 > > 
 > > Bob
 > > -- 
 > >   Robert J. Voisey  :  r_voisey@csd.uwe.ac.uk
 > >          -- Probug Software Developments --
 > > 162 Staplehill Rd, Fishponds, Bristol, Avon, England
 > -- 
 > 
 > THanks
 >           laci

I have used (and given up) two 80mb Imprims MFM drives on my 410/1. I had to 
switch a link inside the machine to select 9 heads. (I don't remember the exact 
link, but I may find it out). But what I want to tell is that these drives has
not worked well on my Arc. They both started to make an annoying 'click' sound 
after some months in use. It appeard more and more frequently. Sometimes when I 
tried to access them, the machine just hang, waiting for the drive to come up or 
something. This way I lost a lot of files, because the machine was hanging when I 
saved data. It seems that it is problems between the Arc and the drive, because
the drives has worked well on PCs after being used inside the Arc. I am now using
a 120mb Conner IDE drive with ICS IDE-podule/software which works perfectly
(even with RO3.10!)

A problem could be the number of sectors. To be able to read/write to the drive,
I had to format it with 32 sectors/track on the Arc. On the PC I used 17 (which
is the right size). Does ADFS use I kind of soft-sectoring? It looks like that,
because standard 40mb Seagate drives, has to be formatted with 32 sectors/track,
and they work well.

-Trygve

In article <1992Nov19.090920.8363@csd.uwe.ac.uk>, r_voisey@garlic.uwe.ac.uk (R Voisey) writes:
> In article <1992Nov17.180524.42564@urz.unibas.ch>, gaspar@urz.unibas.ch writes:
> 
> |> > bigger than 50Megs you have to swap a link (to change sector size I think).
> |>                                / ^^^^^^^^^^^
> |> Could someone tell me what this means? 
> 
> |> 9 heads and when I enter that parameter I get a message that I might! 
> |> swap link 3 or something like that.
> 
[ text deleted]
   So, if you want to swap link 3 you have to take the lid off your
> machine, and find J3. 
[text deleted

> 
> Hope that helps

Yes it helped! Thanks. The jumper wasn't called J3 though. There are two 
jumpers next to the cables that go to the drive and they are calld PL8 and PL9.
I tried out every combination of setting and it worked with BOTH jumpers 
changed. Does someone (maybe from Acorn?) know if that's ok?

The problem wasn't solved completely because the drive should have 88 Meg
capacity. After formatting with 17 Sect/Track, 9 Heads and 1024 Cylinders
(The controller cannot cope with more that 1024, I think. The drive has 1073
cylinders), I had about 40 Meg free on the drive. Where is the rest???

I tried to format the drive with 32 Sect/Track and it worked. But this is
probably not advisable to do.
Any ideas?

> Bob
> 
> -- 
>   Robert J. Voisey  :  r_voisey@csd.uwe.ac.uk
>          -- Probug Software Developments --
> 162 Staplehill Rd, Fishponds, Bristol, Avon, England

laci
-- 

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*             Laci Gaspar, University Basel, Switzerland                      *
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