Solved Correct programme & local disk (C) file sizes ?

[Arcadian]

Whilst definitely not a techie I've just noticed that the size on disk is 1.66 gb and on programme files is 1.65 gb which doesn't sound right at all. Or am I missing something ?

Thanks for any advice..

 

[ICIT2LOL]

Hello mate I am not really sure of what you are asking? Are you talking about a file on the drive being 1.66GB and the same file in Programs and Features is 1.65GB? If so is this causing any issues??

 

[Arcadian]

Hi thanks. Main problem originally was FFox was running very slowly, occasionally freezing/ crashing etc. Tried everything did all the possibles refresh/ disabled add ons/ safe mode/ plug-ins/ watered the plants finally reinstalling FF completely but it's still the same, so when I saw the 1.65 and 1.66 gb grasping at straws thought that that might have something to do with it running slowly....?

 

[whs]

Wrong straw. Nothing wrong with the small difference.

 

[LMiller7]

Due to file system overhead the Size on Disk of a folder will usually be larger than the the sum of the files it contains. But if there are compressed files it could be less. This is far more complex than you imagine.

 

[Callender]

Hi thanks. Main problem originally was FFox was running very slowly, occasionally freezing/ crashing etc. Tried everything did all the possibles refresh/ disabled add ons/ safe mode/ plug-ins/ watered the plants finally reinstalling FF completely but it's still the same, so when I saw the 1.65 and 1.66 gb grasping at straws thought that that might have something to do with it running slowly....?

Did you actually fully remove Firefox? Runnin the uninstaller will not fully remove it.

See: https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer

To remove other files and folders that may not be removed by the uninstall, you must manually delete the Firefox installation folder, which is located in one of these locations by default:
C:\Program Files\Mozilla Firefox
C:\Program Files (x86)\Mozilla Firefox

The uninstaller does not remove any user data such as history or bookmarks. If you wish to completely remove this data, you must manually delete the Firefox folder containing your user profile:
Click the Start button or press the Windows key to open the Start Menu.
Type %APPDATA% in the search field and press enter to open the hidden Roaming folder.
Open the Mozilla folder.
Delete the Firefox folder.
Alternatively, you can press the Windows key +R to open a Run dialog, type in %APPDATA%\Mozilla\ and click OK to open the Mozilla folder, then delete the Firefox folder.

Suggest backing up bookmarks and extensions first:

MozBackup - Backup tool for Firefox and Thunderbird

More info: http://www.sevenforums.com/browsers...-last-three-days-post2773171.html#post2773171

 

[Arcadian]

Hi thanks. Main problem originally was FFox was running very slowly, occasionally freezing/ crashing etc. Tried everything did all the possibles refresh/ disabled add ons/ safe mode/ plug-ins/ watered the plants finally reinstalling FF completely but it's still the same, so when I saw the 1.65 and 1.66 gb grasping at straws thought that that might have something to do with it running slowly....?

Did you actually fully remove Firefox? Runnin the uninstaller will not fully remove it.

See: https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer

To remove other files and folders that may not be removed by the uninstall, you must manually delete the Firefox installation folder, which is located in one of these locations by default:
C:\Program Files\Mozilla Firefox
C:\Program Files (x86)\Mozilla Firefox

The uninstaller does not remove any user data such as history or bookmarks. If you wish to completely remove this data, you must manually delete the Firefox folder containing your user profile:
Click the Start button or press the Windows key to open the Start Menu.
Type %APPDATA% in the search field and press enter to open the hidden Roaming folder.
Open the Mozilla folder.
Delete the Firefox folder.
Alternatively, you can press the Windows key +R to open a Run dialog, type in %APPDATA%\Mozilla\ and click OK to open the Mozilla folder, then delete the Firefox folder.

Suggest backing up bookmarks and extensions first:

MozBackup - Backup tool for Firefox and Thunderbird

More info: http://www.sevenforums.com/browsers...-last-three-days-post2773171.html#post2773171

As far as I know but you might be right, but a friend suggested to try updating the graphics driver which solved the problem so it's now back up to speed again.

Thanks all for the help

 

[Kari]

Whilst definitely not a techie I've just noticed that the size on disk is 1.66 gb and on programme files is 1.65 gb which doesn't sound right at all. Or am I missing something ?

Thanks for any advice..

Not advice per se, just something I think is important to understand.

A hard disk partition contains so called allocation units, also known as clusters. The default NT File System (NTFS) allocation unit is 4,096 bytes, 4 KB. One allocation unit can only contain data from one file, using it all. If the file is smaller than 4,096 bytes it uses one allocation unit, a file between 4,097 and 8,192 bytes uses two allocation units, and so on.

An example:

​

In screenshot properties of two files. File A is 14,221 bytes. Dividing that with the size of an allocation unit 4,096 bytes shows it needs 3.47 allocation units, which will be rounded to 4 allocation units, therefore the size of the file on disk is 4 times 4,096 = 16,384 bytes.

File B the same: it's just a bit bigger than one allocation unit, therefore it occupies two allocation units.

When formatting a hard disk partition you can of course select the allocation unit size:

​

However, there should be no reason to select any other unit size than the default.

This just to explain why there will always be a small difference with the de facto file size and the space it occupies on disk.

Kari

 

[wasnotwas]

@ kari re : cluster size affecting size on disk. In extreme situations eg a large number of v small files, the difference between filesize and size on disk can be massive.

There was an interesting thread on DigitalSpy recently where some dude copied a folder to a usb flash drive, with unexpected results. See pic



cluster size . . .