Major discrepancy between cache utilization reported by Unraid dashboard and by Krusader

[b0m541]

The unraid dashboard reports that 239GB of my cache are used, in Krusader summing up /mnt/cache gives 165GB. How come?

 

(using a btrfs raid1 on 2 SSDs as cache)

Edited January 21, 2022 by b0m541

[trurl]

attach diagnostics to your NEXT post in this thread

[b0m541]

I decline.

 

If some is able to answer without that, it is welcome.

 

[trurl]

13 hours ago, b0m541 said:

(using a btrfs raid1 on 2 SSDs as cache)

Are these disks the same size?

[b0m541]

Yes.

[trurl]

11 hours ago, b0m541 said:

I decline.

I have no more guesses with no more information. Even if I wanted to go back and forth with one question or another for possibly days, I might not ever stumble on the right question to ask you. Maybe diagnostics would suggest a good answer, or at least a good question.

[trurl]

Maybe something here for you

 

https://unix.stackexchange.com/questions/337422/discrepancy-in-disk-usage-between-btrfs-fi-show-and-btrfs-fi-df

 

or some other google search result

[trurl]

You could get the diagnostics and then just post the contents of system/btrfs-usage.txt maybe that would tell something

[b0m541]

Dashboard: 213 GB of 500 GB used (42.5%)

Krusader summing up content of /mnt/cache: 167.4GB

 

btrfs-usage.txt:

Pool: cache
Overall:
    Device size:         931.52GiB
    Device allocated:         402.06GiB
    Device unallocated:         529.46GiB
    Device missing:             0.00B
    Used:             394.72GiB
    Free (estimated):         267.72GiB    (min: 267.72GiB)
    Free (statfs, df):         267.72GiB
    Data ratio:                  2.00
    Metadata ratio:              2.00
    Global reserve:         512.00MiB    (used: 0.00B)
    Multiple profiles:                no

                    Data      Metadata System              
Id Path             RAID1     RAID1    RAID1    Unallocated
-- ---------------- --------- -------- -------- -----------
 1 /dev/mapper/sdk1 199.00GiB  2.00GiB 32.00MiB   264.73GiB
 2 /dev/mapper/sdj1 199.00GiB  2.00GiB 32.00MiB   264.73GiB
-- ---------------- --------- -------- -------- -----------
   Total            199.00GiB  2.00GiB 32.00MiB   529.46GiB
   Used             196.00GiB  1.35GiB 48.00KiB   

 

 

Having read these information it doesn't get any clearer to me...

Edited January 21, 2022 by b0m541

[JorgeB]

GUI and df for example will show the correct stats for that pool, not all tools show correct stats with btrfs, there are currently about 198GiB (or 213GB) used.