[Coco] Biggest OS-9/Nitros-9 HD?

Dave Kelly daveekelly at earthlink.net
Fri Sep 23 22:49:11 EDT 2005

Diego Barizo wrote:
>   I've been reading the OS-9 manual, and I understand that the FAT uses 
> 3 bytes - 24 bits - to keep track of the files sectors.
> That would give 16777216 sectors, and at 256 bytes a sector, 4194304 Kb, 
> or 4 Gb
> Is that the maximum size of HD partition that OS-9 can work with?
> What is the biggest HD any of you has ever used with OS-9?
> Also, the manual says something about the files being able to be as big 
> as the media. Did I get it right? Could OS-9 in 1985/6 work 
> (theoretically) with files over 2 GB, something that Windoze machines 
> could not do until the release of WinXP some 23 years latter?
> Diego
Your math is correct. But look at your allocation table. 1 sector = 256 
byte x 8 bits = 2048 sectors of storage x 256 (sector size) = 624,280 
hard disk size possible.


When I stuck my 2 gigger in my OSK machine and let it figure its own 
format.  Came up with a sector size of 4096 bites each.

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