GUI space usage does not match actual drive usage??

[poldim]

I be got a pair of 250GB SSDs setup as the cache. Currently it's showing red as is says they are 226GB full.  

http://i.imgur.com/8bqUbPu.png

du -sh /mnt/cache/
187G    /mnt/cache/

du --si -s /mnt/cache/
200G    /mnt/cache/

Where is the extra 26GB coming from?

[JorgeB]

du doesn't really work with btrfs, use:

 

btrfs fi df /mnt/cache

 

note that output is in GiB, unRAID uses GB.

Edited May 17, 2017 by johnnie.black

[poldim]

On 5/17/2017 at 9:59 AM, johnnie.black said:

du doesn't really work with btrfs, use:

 

btrfs fi df /mnt/cache

 

note that output is in GiB, unRAID uses GB.

 

So I found I can use this to display in GB:

btrfs filesystem df /mnt/cache/

But I've found that this function does not support wildcards.  How do I get the equivalent of this:

du --si -s /mnt/cache/*              
54G	/mnt/cache/appdata
55G	/mnt/cache/system
92G	/mnt/cache/vdisks

I'm essentially trying to see a folder output view with their file sizes to try to understand what's using up more space than it should.

[JonathanM]

44 minutes ago, poldim said:

I'm essentially trying to see a folder output view with their file sizes to try to understand what's using up more space than it should.

Krusader docker has a nice graphical disk usage tool.

[JorgeB]

1 hour ago, poldim said:

 

So I found I can use this to display in GB:

 

To display in GB you need to use -H, like:

 

btrfs fi df -H /mnt/cache

 

1 hour ago, poldim said:

to try to understand what's using up more space than it should.

 

The above command will report the actual used space, the same as the one reported in the GUI.