On Oct 27, 2008, at 1:32 PM, Dan wrote:

>> A hard disk can't be used "raw". It must be partitioned first, then
>> the /partition/ is formatted and that's where your data goes.
>
> One *formats* a drive.  Usually this is done at the factory.  The
> last step of which is to lay down a partition map (Apple or GID), and
> create (non-mountable) partitions to contain drivers and such.

Drives haven't been able to be formatted for many moons.

Once the drive physical characteristics were changed to delete the ID  
portion of every sector (the so-called "ID-less" architecture,  
invented by IBM before they spun-off its San Jose SPD to Hitachi and  
got out of the disk drive business altogether), drives ceased to be  
formattable, except at the factory.

All drives are shipped as "formatted". The drives could also be  
shipped with a default "initialization", which could be FAT-32 or  
something else.

When the end-user receives a drive, it is his responsibility to  
"initialize" it to suit his system, which, for Macs, usually means  
APM (G4s) or GPM (Intels).

Bottom line: after a drive leaves the factory, all writes to the  
drive are so-called "update writes", never so-called "format writes",  
as formatting is inhibited for the end-user. True formatting can only  
be done at the factory using a special test fixture and software,  
anyway.


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