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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Consumer Hardware & Components > REAL HD space

REAL HD space
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Fresh-Faced Recruit
Join Date: Jul 2006
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Jul 30, 2006, 08:48 AM
 
I just purchased a new Seagate external HD.
Well, it's an internal put into an enclosure.
It's 320 Gig. I bought it from a PC based shop. I was told even though it is rated as 320 Gig, it won't show the full 320 available. At the shop it showed up as 298 Gig free. Brought it home, plugged it into my G4 PB and it still shows 298 Gig free.
Is this normal? I can understand maybe losing 5 Gig, but 20???

I haven't installed OS onto it or anything else.
     
Addicted to MacNN
Join Date: Oct 2002
Location: Washington, DC
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Jul 30, 2006, 09:07 AM
 
Yes, it's fine.

Hard drive manufacturers rate their drive's capacities based on the assumption that 1 GB = 1,000,000,000 bytes. In practice, 1 GB = 1,073,741,824 bytes.

It's just marketing. The actual capacity of your drive is actually about 298 GB.

"One ticket to Washington, please. I have a date with destiny."
     
Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Jul 30, 2006, 10:40 AM
 
Hard drive manufacturers and resellers (like Apple) use G as the standard SI prefix for 1 billion.
Most operating systems use G on screen, but really mean Gi, for 2^30.

320GB * (10^9 / 2^30) = 298 GiB
     
   
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