Solved

Disk Space Is Unavailable and Unviewable

Posted on 2012-04-04
13
336 Views
Last Modified: 2012-06-21
Hello,

I have several 2TB drives which contain largely video and which I backup to other 2TB drives, so that they should be exact copies of each other.  However, the amount of disk space differs dramatically between the original and the copy.  In the worst case, the original drive has 864GB free  while the copy has only  724GB.  I've done disk checks, emptied all the temporary files and virus checked them to death.  The actually number of files and cumulative size as reported by the backup utility shows the disks to be exactly the same.

Can anyone figure out what might be going on?

Thanks,

Peter
0
Comment
Question by:Peter044
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 7
  • 6
13 Comments
 
LVL 10

Expert Comment

by:Netty
ID: 37808911
Which file system, what cluster size?
0
 

Author Comment

by:Peter044
ID: 37809385
All are NTFS.  Where do I find the cluster size?

Peter
0
 
LVL 10

Expert Comment

by:Netty
ID: 37809509
run this command: fsutil fsinfo ntfsinfo C:

Replace the C: with the letter of the drive you want to check.
0
Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

 

Author Comment

by:Peter044
ID: 37809700
Hi Netty,

I'm not sure how to do that.   When I bring up a CMD window, it says I need administrator privileges, which I have.  I'm assuming I need to explicitly run the command as an administrator, but don't know how to do it from a CLI.

Running it in the "search program files" box above the windows icon opens a window to briefly for me to read it.

In general, I don't understand why I am constantly asked for administrator privileges when I've given them to myself.  Any ideas there?

Thanks,

Peter
0
 
LVL 10

Expert Comment

by:Netty
ID: 37809707
In general, I don't understand why I am constantly asked for administrator privileges when I've given them to myself. - UAC by Microsoft.

Running it in the "search program files" box above the windows icon opens a window to briefly for me to read it. - write "fsutil fsinfo ntfsinfo C: > C:\ntfsinfo.txt" and then look at C:\ntfsinfo.txt file. Or read the "Run a Command as Administrator from the Windows 7 / Vista Run box" http://www.howtogeek.com/howto/windows-vista/run-a-command-as-administrator-from-the-windows-vista-run-box/
0
 

Author Comment

by:Peter044
ID: 37814724
Cluster size is 4096 bytes
0
 
LVL 10

Expert Comment

by:Netty
ID: 37814749
On both discs?
0
 

Author Comment

by:Peter044
ID: 37814836
Yes.
0
 
LVL 10

Accepted Solution

by:
Netty earned 500 total points
ID: 37826257
Try to erase recycle bins, defragment both disks and then run, for example, FolderSizes http://www.foldersizes.com/index.htm or FreeFileSync http://sourceforge.net/projects/freefilesync/
0
 

Author Comment

by:Peter044
ID: 37826661
OK, that was really useful.   I did as you suggested and when I ran foldersizes, I can see into the Recycle Bin, even though I just emptied it.  On one of the drives, there is a folder in the recycle bin that is 188 Gb, which is the difference I couldn't see.  Why does the Recycle Bin show empty on Disc Cleanup, but have all these files in it that I can see with foldersizes?
0
 
LVL 10

Expert Comment

by:Netty
ID: 37833554
I dont'n know, may be it was "hidden"...
0
 

Author Comment

by:Peter044
ID: 37835112
That's really weird.  Anyway, all is well.  Thanks very much for your help,

Peter
0
 

Author Closing Comment

by:Peter044
ID: 37835113
I was able to view and delete files in the Recycle Bin that invisible previously.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

How to record audio from input sources to your PC – connected devices, connected preamp to record vinyl discs, streaming media, that play through your audio card: Vista, Windows 7, Windows 8, Windows 8.1 and Windows 10 – both 32 bit & 64.
The Windows functions GetTickCount and timeGetTime retrieve the number of milliseconds since the system was started. However, the value is stored in a DWORD, which means that it wraps around to zero every 49.7 days. This article shows how to solve t…
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…
The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question