Sign in with
Sign up | Sign in
Your question
Solved

Hidden memory

Last response: in Storage
Share
October 6, 2012 6:30:39 PM

hey, I just bought a new laptop so I'm cleaning my old one. I have a 250 gb hard drive, and I only have access to 232. This is normal but after I cleaned my laptop, I saw that I still had 70gb used. I looked in alll my files and couldn't find why I was using so much space. I took all the files in my C disk (it includes windows folder so it also includes windows 7 I guess), look at the properties and saw it was only using about 30gb. Where and what is the other 40gb on my laptop...

It is not a big deal but still 40Gb out of a 250gb disk is about 15%...

More about : hidden memory

a b D Laptop
a c 104 G Storage
October 6, 2012 6:36:44 PM

Hello, & Welcome to Tom's Hardware!

Look in Disk Management (right click My computer, Manage, Computer Management) click on Disk Management lower left.
It may show you a hidden or reserved or recovery partition placed there by the Manufacturer that you won't see from Windows Explorer.
m
0
l
a b D Laptop
a b } Memory
a c 317 G Storage
October 6, 2012 6:40:30 PM

There are a number of reasons. First a 250Gb HDD isn't really 250Gb, HDD makers spec drive in 10^3 (1000) bytes not 2^10 (1024) bytes plus formatting, so you get around 232Gb on a "250Gb" drive. Also there are Win7 files that take up a lot of unseen space, primarily the swap space, the restore files, and the hibernation files.
m
0
l
Related resources
a b D Laptop
a b } Memory
a c 80 G Storage
October 6, 2012 7:10:19 PM

^+1
m
0
l
October 7, 2012 7:28:55 PM

John_VanKirk said:
Hello, & Welcome to Tom's Hardware!

Look in Disk Management (right click My computer, Manage, Computer Management) click on Disk Management lower left.
It may show you a hidden or reserved or recovery partition placed there by the Manufacturer that you won't see from Windows Explorer.


I looked in disk management and there was only my C disk.
m
0
l
October 7, 2012 7:29:50 PM

RealBeast said:
There are a number of reasons. First a 250Gb HDD isn't really 250Gb, HDD makers spec drive in 10^3 (1000) bytes not 2^10 (1024) bytes plus formatting, so you get around 232Gb on a "250Gb" drive. Also there are Win7 files that take up a lot of unseen space, primarily the swap space, the restore files, and the hibernation files.



so it would take about 40gb of space? more than windows 7 itself? it's non sense!
m
0
l
a b D Laptop
a b G Storage
October 7, 2012 7:35:51 PM

bao_93 said:
so it would take about 40gb of space? more than windows 7 itself? it's non sense!


Marketing a drive at one interpretation of what a Gb is isn't quite nonsense, it's one interpretation vs another. Microsoft has always interpreted 1 megabyte as 1024 bytes. Hard drive manufacturers, for some reason whether it be cutting cost or willingly fooling customers to get their money or whatever, interpret a megabyte as 1000 bytes. The space you have is exactly the same, it just differs depending on how you interpret it. You still have 250,000,000 bytes, but whether or not you want to call that 250Gb or 232Gb is up to whoever is relaying the information.
m
0
l
a b D Laptop
a c 104 G Storage
October 7, 2012 9:23:51 PM

Hi again,

Now that you know there are no hidden or recovery partitions, go back to Disk Management, and under the Drive column in the graphical area on the left, it will tell you exactly how many GB are on your drive. It will say Disk 0, Basic, 244.0 GB, Online, or similar.

For example I have a 2000 GB WD HDD which is reported as 1863.02 GB. If you divide 2000 by 1.024 you get 1953.125 GB, so there is some hidden space used by the drive itself.

If there's still "missing space", download and run "Windows Directory Stats" WinDirStat, which is a Graphical disk useage statistics viewer (free)

Here is the website: http://windirstat.info/

It will show you a graphical representation of what is using what space.
m
0
l

Best solution

a b D Laptop
a b } Memory
a c 317 G Storage
October 7, 2012 9:38:09 PM

bao_93 said:
so it would take about 40gb of space? more than windows 7 itself? it's non sense!
While you may think it nonsense, those files can easily take 40Gb of space. If you don't want the space then don't make those changes, up to you.
Share
Anonymous
a b D Laptop
a b } Memory
a b G Storage
October 7, 2012 9:49:15 PM

bao_93 said:
so it would take about 40gb of space? more than windows 7 itself? it's non sense!

you are not losing anything; it is just being measured differently (1000 vs 1024).


that is all.
m
0
l
a b D Laptop
a c 289 G Storage
October 8, 2012 7:42:05 AM

John_VanKirk wrote :

"For example I have a 2000 GB WD HDD which is reported as 1863.02 GB. If you divide 2000 by 1.024 you get 1953.125 GB, so there is some hidden space used by the drive itself."

With respect, I think you are having a brain fart. :-)

2000 GB = 2000 / (1.024 ^ 3) GiB = 1863 GiB

m
0
l
a b D Laptop
a c 104 G Storage
October 8, 2012 3:36:21 PM

fzabkar said:
John_VanKirk wrote :

"For example I have a 2000 GB WD HDD which is reported as 1863.02 GB. If you divide 2000 by 1.024 you get 1953.125 GB, so there is some hidden space used by the drive itself."

With respect, I think you are having a brain fart. :-)

2000 GB = 2000 / (1.024 ^ 3) GiB = 1863 GiB


+^ Not only that, a Senior Moment - Happens frequently at my age!
m
0
l
a b D Laptop
a c 289 G Storage
October 8, 2012 5:50:56 PM

I get them, too (brain farts and senior moments).
m
0
l
October 9, 2012 4:28:38 AM

Best answer selected by bao_93.
m
0
l
!