On Sep 4, 2008, at 1:09 PM, insightinmind wrote:

> 1GB = 1028MB, and not 1000 MB,
>

If you read the device's characteristics, it says it's capacity is  
1000 megabytes.



> and that when a disk is formatted, you "lose" space due to maintenance
> / indexing / allocation needs of the system ... maybe even bad sectors
> being mapped out.


The maintenance cylinders are not visible to the user, although they  
are there.

The manufacturing process provides the user with 1000 megabytes of  
fully usable, fully contiguous blocks, with blocks numbered from zero  
to n-1.

Even with the least complicated initialization for MacOS, there will  
be around nine partitions which are present and are reserved for  
system use, such as holding the SCSI boot loader, or the IDE boot  
loader, or the Firewire boot loader, or the SATA boot loader, plus a  
patch partition, etcetera.

The first user-accessible partition starts after those partitions.

The initial director space comes out of the user-accessible partition  
space.

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