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Discussion Starter #1
I would like to ask if anyone could please post a picture of their (right click > properties) 256gb 840 pro in Windows.

From what I see on the internet, 256gb ssds are all 256,058,060,800 bytes. However my 840 pro only has 255,466,663,636 bytes (Windows 10 dsp 64bit). Is this the standard 840 Pro size or is there something wrong with the drive?

Thank you for taking the time to read this.
 

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Quote:
Originally Posted by g33b88e22a View Post

I would like to ask if anyone could please post a picture of their (right click > properties) 256gb 840 pro in Windows.

From what I see on the internet, 256gb ssds are all 256,058,060,800 bytes. However my 840 pro only has 255,466,663,636 bytes (Windows 10 dsp 64bit). Is this the standard 840 Pro size or is there something wrong with the drive?

Thank you for taking the time to read this.
Check windows disk management. Likely a bit of unpartitioned space.
 

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Originally Posted by xioros View Post

Check windows disk management. Likely a bit of unpartitioned space.
Thank you for the reply. Unfortunatly that is not the case. I just did i fresh install of windows after using diskpart>clean from the install disk. Disk management also shows that all space is being used.
 

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How old is the drive and how much have you written to it?
 

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Originally Posted by Socom View Post

Completely normal for a drive to show up less than advertised, its how the manufacturers calculate the capacity. Windows does the binary calculation in base 2 while manufacturers do base 10. I wouldn't worry about being shy 1GB

http://knowledge.seagate.com/articles/en_US/FAQ/172191en?language=en_US
I am aware of this, but a 256gb drive should show as 238gb (256,058,060,800 bytes) in windows. The 256gb drives from Sandisk, Adata and Crucial all show up as 238gb (256,058,060,800 bytes) in windows properties.
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Originally Posted by xioros View Post

How old is the drive and how much have you written to it?
It is new. It passed self smart check with 0 bad sectors but i cant check Samsung magician until i get wired internet.
 

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Discussion Starter #7
I reinstalled Windows 10 on another drive, used diskpart clean on the 840 Pro 256gb and attached it as a data drive. Now it shows up as 255,924,891,647 bytes. Can anyone else with this drive match this number?
 

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Gpt partitioning will eat some of the available space. Cluster size also matters here. You keep giving the size of the partition. Use hdtune or some such and look at the LBAs.
 

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My Micron M600 256GB shows as 255,xxx,xxx,xxx as well:

 
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