William Hughes wrote:
> 
>> My 160 gig HD on my iMac G5 shows up as 148 gig.  Do the math!
>>
> Umm yeah that was VERY helpful... what does your response have to do 
> with what I was asking?

What he means is that his iMac G5 passes the 137GB limit.

Because HD manufacturers count 1GB as 1000MB while 1GB is actually 
1024MB, because you know that:
1 Byte = 8 bits and
1 kilobyte (K / Kb) = 2^10 Bytes = 1.024 Bytes

1 Gigabyte (G / GB) = 2^30 Bytes = 1.073.741.824 Bytes so
160GB / 1.073.741.824 Bytes =  149.011.611.940

You can also count it this way:

160,00 GB * 1000 = 160.000 MB
160.000 MB * 1000 = 160.000.000 kByte
160.000.000 kB * 1000 = 160.000.000.000 Byte

So:
160.000.000.000 Byte / 1024 = 156.250.000 KB
156.250.000 KB / 1024 = 152.587,89 MB
152.587,89 MB / 1024 = 149,01 GB

So after formatting the HD the OS sees his 160GB HD according to Tim as 
a 148GB drive (actually 149GB).

It gets even worse if you get a bigger HD. I recently bought a 250GB HD, 
after formatting I had 'only' 232.83 GB left...


BTW @Dylan the B&W G3 is only ATA33, not ATA66



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