1TB Ubuntu as 930GB

[pluto4ps]

Hi,
I bought 1TB of HDD to use it with Ubuntu and while installing its shows 930GB is it right?

[amauk]

yes
this is a problem of binary vs decimal notation

When quoting capacity, drive manufacturers will use 10^3 (decimal notation)
meaning 1 Mb = 1000 Kb,
and 1 Gb = 1000 Mb

Binary is obviously 2^10
meaning 1 Mb = 1024 Kb,
and 1 Gb = 1024 Mb

[geekman64]

hmm...

he is right about that BUT i did the math :)

930GB = 952 320 megabytes
thats not really 1 TB !

So this is a FAT32 usb western digital 1TB hard drive? I wonder how much is in use already, eg. system files and what-not?

32KB one empty folder, created after format. Brand new just out the box..... :popcorn:

Looks like its just bad marketing, or good marketing depending on how you look at it ::):-k

[amauk]

Old thread...!

1 TB
1,000 GB
1,000,000 MB
1,000,000,000 KB
1,000,000,000,000 B
976,562,500 KiB
953,674 MiB
931 GiB
0.91 TiB

[srs5694]

hmm...

he is right about that BUT i did the math :)

930GB = 952 320 megabytes
thats not really 1 TB !

You did part of the math. See amauk's response for the complete sequence, which covers more than just the GiB-to-MiB conversion; it goes all the way down to bytes. Better, see this site (http://physics.nist.gov/cuu/Units/binary.html) (or many others like it) for a description of the whole thing, including the proper suffixes (which amauk uses), some of the history, etc.