Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: C: Drive Used/Free Space WAY Different Than Actual?

02 Sep 2014   #11
LMiller7

Windows 7 Pro 64 bit
 
 

Slack space is one of many factors that complicates disk space usage calculations. Each file is made up of a number of allocation units known as clusters. Typically they will be 4096 bytes. If a file consumes exactly 1 cluster adding 1 more byte will require the allocation of another cluster just to store that one byte. The rest of the cluster will be wasted. A factor that partially offsets this waste is that very small files may be stored entirely in the MFT (if the drive is NTFS formatted) and not require any extra clusters for it data. How large such a file can be depends on the storage requirements of the other attributes of the file, such security settings. If the file simply inherits it's security settings from the parent folder this will not be much. But if it has settings of it's own it could require substantial space. Then there is the fact that folders are themselves files which consume disk space.

And there is more. Much more.

Windows Explorer and other utilities ignore most of these factors or makes arbitrary decisions. In many cases how much these factors would effect the calculations is unknowable.


My System SpecsSystem Spec
.
Reply

 C: Drive Used/Free Space WAY Different Than Actual?




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Hard drive partition: adding free space back to c: drive
Hi everyone, I installed Ubuntu on my computer a few months ago and created another partition for it on my 1TB hard drive. I didn't really care for Ubuntu so I decided to delete the partition it was on. :geek: That might have been a mistake. :( Well, now there's 87.68GB of free space on...
Performance & Maintenance
Please help me free up space on my C Drive.
I have the Alienware M14XR2 with an i7-3610QM CPU @ 2.30GHz and 12 GB of ram but my C drive is completely filled up. My C Drive has 40.8 gigs of memory total and less than 1 gig is available. I have a solid state drive installed that has more than enough memory for me but it seems like my OS and...
Performance & Maintenance
help to shrink drive c w/400+ g's free space but see only 900+ MB's
I've just updated the pc specs for this thread. It's a XPS 15 about 2 months old and is the first laptop I've ever owned or used. It came with a 500 G. hard drive of which 102 MB's are the OEM Partition, 19.53 G's for Recovery and 446.13 G's for C drive. C drive has 403.33 G's free space. When I...
Performance & Maintenance
Need to free up space in D drive
I was having some issues while spending time with some friends via the internet (primarily while playing Left 4 Dead 2), and my computer kept on freezing and locking up. I think it might be due to too much space on my computer being taken up, thus making it to where my computer didn't have enough...
General Discussion
HELP! free space on C drive keeps decreasing!
the space on my C drive keeps decreasing, i was doing my regular work and i recieved a message saying the space in my c drive is low.. i usually used to have around 13GB of free space..but it turned to just 1GB in a while.. it comes back to 13GB or 12 GB after i restart my computer but again...
General Discussion


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 16:31.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App