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Kaunisto Profile
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The Big Boss

Registered: 01-2008
Location: Finland
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KB/MB/GB


Are kilobyte, megabyte and gigabyte 1000, 1000000 and 1000000000 bytes or 1024, 1048576 and 1073741824 bytes?

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Jan/23/2019, 13:41 Link to this post Send PM to Kaunisto
 
Morwen Oronor Profile
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Chief of Staff

Registered: 01-2008
Location: South Africa
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Re:


According to Quora:

"A terabyte (TB) is 1,024GB; 1TB is about the same amount of information as all of the books in a large library, or roughly 1,610 CDs worth of data. A petabyte (PB) is 1,024TB. Indiana University is now building storage systems capable of holding petabytes of data:

Bit: Computers deal with binary digits, or bits for short. A bit can be 0 or 1, equivalent or off or on.

Byte: One byte is eight binary digits, such as 1111001.

Kilobyte (KB): The smallest file stored on a smartphone, tablet or PC is typically four kilobytes (4KB) in size. A kilobyte is 1024 bytes, a. Therefore 1KB is the same as 1024 x 8 = 8192 binary digits.

Megabyte (MB): 1024KB equals one megabyte (MB),

Gigabyte (GB): There are 1024MB in one gigabyte.

Terabyte (TB): There are 1024GB in one terabyte (TB)"
Jan/28/2019, 7:44 Link to this post Send PM to Morwen Oronor
 
Kaunisto Profile
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The Big Boss

Registered: 01-2008
Location: Finland
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Re: KB/MB/GB


I'm used to that - from quarter century of DOS and Windows.

I started thinking this as I got another memory stick and as you probably know, a 32GB drive usually has around 30GB of space. (What I really don't understand is that they vary slightly, one brand may have a GB more than another.)

This particular (Sandisk Cruzer Blade) has in front of package 32 GB - with an asterisk!
And looking the back of it, there's tiny text that first informs you that 1GB=1 000 000 000 bytes.
Well, that's somewhat fair as both definitions are used and this version commonly in disk sizes.
But after that there's further comment: Actual user storage less

In what other product can you put a quantity in front of package and then add a small print telling there's not actually that much!?

And the difference can be up to 10% with the 1024 count or at least several percents even without that.


Back to actual question.

Wikipedia, to my surprise, takes more the stand that kilo, mega and giga having the general meaning of thousand, million and milliard/billion, are also in bytes 1000, 1000000 and 1000000000.
But it admits the matter is ambiguous.

There's also mentioned suggested solution: kibibyte, mebibyte, gibibyte or KiB, MiB, GiB.
These would be used to denote that the number is with the binary/1024 system.

Have you ever seen KiB/MiB/GiB anywhere? I'm pretty sure I've seen it somewhere, but can't remember context (maybe a game system requirements?)

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Jan/28/2019, 15:57 Link to this post Send PM to Kaunisto
 
Morwen Oronor Profile
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Chief of Staff

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Location: South Africa
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Re:


We use Kb, Mb, and Gb, also Tb. I'm looking at buying a NAS to store all my archives. I have too many backups of the same data.
Feb/10/2019, 14:07 Link to this post Send PM to Morwen Oronor
 


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