My new iMac has wrong Hard Drive

littlelarry33

macrumors member
Original poster
Aug 4, 2007
79
0
I ordered a new iMac 2.0 ghz processor and 1 gb of ram, dvd burner and a 160 gb hard drive. The only problem is that under about this mac it says my hard drives mac capacity is 149.05 gb so i order 160 how come it is not 160 gb???
 

Scarlet Fever

macrumors 68040
Jul 22, 2005
3,272
0
Bookshop!
Read the fine print. "1GB = 1,000,000,000 bytes. Actual formatted capacity less".

In the real world, 1 kilobyte = 1,024 bytes. In the marketing world, 1 kilobyte = 1000 bytes.
 

Scarlet Fever

macrumors 68040
Jul 22, 2005
3,272
0
Bookshop!
so i lose 10 gb from formating
Nah, you never had that 10GB to start with.

Go to Disk Utility (Applications -> Utilities -> Disk Utility), and click on your HDD. Disk Utility says my 80GB external drive has a Total Capacity of 74.5GB (80,026,361,856 Bytes).

It's tricky and deceiving, but the companies manage to get away with it.
 

iToaster

macrumors 68000
May 3, 2007
1,743
0
In front of my MacBook Pro
We humans tend to base capacities off of 10, but a computer bases it off of 2, hence the 256, 512, 1024, etc. If you want to find the actual capacity of the drive, divide the number of bytes (160,000,000,000 for you) by 1024 3 times... then you will know the actual capacity. Besides, who wants to read long decimals and odd numbers, don't we want a regular number?
 

neven

macrumors 6502a
Oct 10, 2006
815
0
Portland, OR
I'd just like to add that every hard drive (or other storage device) manufacturer does this. You can't buy a 160 GB hard drive and have it show up as 160 GB.

Think of it as advertised gas mileage with cars. What's on the sticker assumes ideal conditions. It's not quite the same thing with storage capacity, but they get away with it for the same reasons - you can compare different models relatively (200 GB is twice the storage of 100 GB by any measure) and it really doesn't matter that much to the average consumer.

A 15" MacBook Pro doesn't have a 15" screen either - it's 15.4". Apple reports it as being smaller for the sake of simplicity.
 

steve_hill4

macrumors 68000
May 15, 2005
1,856
0
NG9, England
Also, strangely enough, you'll notice that memory also works, (as all things computer related), in binary. 32MB>64MB>128>256>512>1GB>2GB etc. However they are quoted exactly as they should be.

On the other hand, flash memory doubles each time also, but is the same as magnetic HDDs. I recently bought a 16GB USB flash drive. It's 15.6GiB though.