Hi there,

I'm a noob. I searched but didn't find exactly what seems to be my problem.

 

I added a 500 GB SSD to my cache.  I had an existing 128 GB as a cache drive that was almost full.  After adding the 500 GB drive and not seeing 628 GB in size I did some research and after rebalancing it as btrfs single on the main page it now shows 628 GB on the unraid main page. 

 

I noticed the drive won't fill over 112 GB and my VM slows to a craw like when a bare metal machine runs out of hard drive space. 

 

I added a 200 GB vhd to a share that is cache only and tried to copy 20gigs of files to it to see if I can get it over 112 GB but the files won't copy and windows explorer hangs. 

 

When I click on the cache pool from the main tab on unraid it takes me to the page where I can balance the cache pool and I noticed this.

 

Shouldn't the total = 628.00GiB or at least close to it?

btrfs filesystem df:

Data, single: total=113.00GiB, used=106.98GiB
System, RAID1: total=32.00MiB, used=16.00KiB
Metadata, RAID1: total=1.00GiB, used=228.20MiB
GlobalReserve, single: total=166.39MiB, used=0.00B

Please post your diagnostics: Tools -> Diagnostics

Here they are. 

tower-diagnostics-20180716-2341.zip

Log is spammed with network errors, update to latest unRAID, reboot and try again, post new diags if you still have issues.

I did an update to all my dockers and plugins and did the unraid update.  I did a balance on the cache but no change.

 

here are my diagnostics.

 

Any help is appreciated thanks.

tower-diagnostics-20180717-2053.zip

Strange, it's like no data is written to the larger device, and in this case it should be used first, you can try this:

 

Balance the pool to raid1:

btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/cache

 

When done back to single profile:

btrfs balance start -dconvert=single -mconvert=raid1 /mnt/cache

 

Then post the output of:

btrfs fi usage /mnt/cache

Data should remain on the larger device.

 

 

 

 

still the same issue after doing all that.  when I do the 

 

btrfs fi usage /mnt/cache command I notice unallocated space on both drives 118GB on sdg1 and 355GB on sdh1 is there maybe a command to allocate this space?  

 

 

Screenshot (Jul 18, 2018 4:28:31 PM)

It's correct, and it was before, I mixed up the drives, all the data is on the largest drive, this is normal, only when both have approximately the same free space it will start writing to the smaller one.

you are right.  Added files to it and am now over the 112 limit.  Weird that it wouldn't let me before and the slow down on my VM was unbearable. I'm at 140 GB and my VM is as fast as if it was brand new.  

 

Either the update or the re-balance to raid and then single fixed something. 

 

Thanks so much for your help.