CompanyLogo
Search Advanced Search
Categories
General Questions (53)
Studio Series (20)
Evolution Series (27)
G-DRIVE Family (41)
G-RAID Family (51)
G-SPEED/G-SAFE Family (52)
G-CONNECT (53)
G-MINI (16)
G-SATA (15)
Search
Advanced Search
FAQs
Search our FAQ to find resolutions to common issues.
My computer says my drive is less capacity than advertised
Here is an approximate breakdown of what you will see on your computer for it's respective selling size.

 Decimal
Size You Bought
 = Binary
Available Space
On Your
Computer
 100GB   93.1GB
320GB   297.95GB
500GB   465.55GB
640GB   595.90GB
750GB   698.32GB
1TB   931.10GB
1.5TB   1396.65GB

 
Hard drive manufacturers use a calculating method different than how computers calculate figures, so there will be nominal differences. This is how hard drive manufacturers have been selling drives since day one. We agree that showing accurate amount makes sense. Though selling 111.68GB hard disk probably isn't as easy to understand as 120GB.
 
 
The Technical Explanation:
 
Decimal vs.. Binary:
For simplicity and consistency, hard drive manufacturers define a megabyte as 1,000,000 bytes and a gigabyte as 1,000,000,000 bytes. This is a decimal (base 10) measurement and is the industry standard. However, certain systems define a megabyte as 1,048,576 bytes and a gigabyte as 1,073,741,824 bytes. These are binary (base 2) measurements.

This is why different utilities will report different capacities for the same drive. The number of bytes is the same, but a different number of bytes is used to make a megabyte and a gigabyte. This is similar to the difference between 0 degrees Celsius and 32 degrees Fahrenheit. It is the same temperature, but will be reported differently depending on the scale you are using.

 


Print  Email  Save  Notify Me  Add to Favorites 
Article ID: 25 Article Created: 08-06-2009 21:50 PMLast Modified: 07-31-2013 11:47 AM

How well did this article answer your question? 100% 75% 50% 25% 0%

Most Recently Viewed Articles
G-SPEED Q LED Visual Notifications
 View this article to determine what the LED colors on your G-SPEED Q mean....
How do I setup my G-Technology drive for use with Time Machine?
G-Technology drives are designed to be compatible with the Apple Time Machine software....
What is the difference between the G-DRIVE and G-RAID?
   ...
How to format your drive for use with both Windows and Mac (FAT 32)
 Follow these steps to format your drive for both Windows and Mac...
I'm using copper cables that causes the G-Speed to be inconsistent
If you're using copper cables with your G-Speed and are experiencing inconsistent mounting both G-Technology and ATTO recommend that you switch to Fiber Channel Cables for consistent performance....
Formatting your drive for both Mac and Windows using ex-FAT
 This article contains information how to format your G-Technology hard drive for use with both Windows and Mac using the ex-FAT format....
Formatting NTFS for Windows
 This article contains information on how to format your G-Technology Hard Drive in NTFS for use with Windows....
How do I change the RAID settings on my G-RAID Studio(MAC)?
 Instructions on installing and changing the RAID settings for the G-RAID Studio....
Is the G-RAID Studio “hot swappable’?
  ...
How to format/reformat your drive for Mac (HFS+)
 Follow these steps to format your drive for use on the Mac:...