Help Mounting A2090a MFM Seagate ST-238R

[amigafeeling]

Hi,

I'm attempting to install a HD Seagate ST-238R on my Commodore A2090a : it's a MFM 30 Mo formatted hard disk.

4 Heads and 615 cylinders indicated on the net.

With "Prep RES0:", i prepared it : 4 Heads, 615 Cylinders and 17 Blocks per track (the maximum authorized by the software).

But, once formatted, partition makes only 20 Mo, not 30 Mo.

It's the fault of the 17 Blocks per track max i think.

Is there a solution ? (I tried with 5 heads, after 800 cylinders, but it doen't work).

Thanks for your help.

[amigafeeling]

i own others controllers ... but it's a challenge for me !

[amigafeeling]

No it's working : formatting a 20 Mo partition on my A2090 is a success.

[amigafeeling]

Mark Paul Gosselar !!

[amigafeeling]

Curtis,

Do you have a good link to give me about MFM / RLL encoding ?

I'm interested.

[amigafeeling]

You're right Curtis.

You can read that :

http://redhill.net.au/d/10.php

Thanks for your help.