unRAID Cache disk message warning

[luigi408]

Hi all,

 

I updated to the latest Unraid. After reboot I got this message on me email regarding a warning from my server:

 

Event: unRAID Cache disk message

Subject: Warning [HOMESERVER] - Cache pool BTRFS too many profiles

Description: Crucial_CT250MX200SSD1_162513059F49 (sdd)

Importance: warning

 

Can anyone explain to me what this means and how I can fix it?

 

Thank you very much.

[JorgeB]

That means that there's more then a data profile in use, most common on earlier btrfs kernels and usually easily fixable, post the output of:

 

btrfs fi df /mnt/cache

[limetech]

Also, what version of unRAID OS did you upgrade from?

[clevoir]

I am having the same problem and updated from 6.2.4

 

Output is

 

Data, RAID1: total=109.00Gib, used=106.62GiB

Data, single: total=1.00GiB, used=0.00B

System, RAID: total=32.00MiB, used=16.00KiB

Metadata, RAID1: total=2.00GiB, used=257.89MiB

GlobalReserve, single: total=16.58MiB, used=0.00B

[JorgeB]

Single profile is unused but a balance will get rid of it, on the main page click on cache and then on balance using the default options, check the output of fi df again in the end and raid1 data profile should be the only remaining one.

[luigi408]

I also upgraded from 6.2.4 (the last stable release). I had the same output as above. I ran that balance as suggested and I only have RAID1 showing. Thanks.

[clevoir]

I have run the balance command and this is now the output

 

Data, RAID1: total=108.00GiB, used=106.61GiB

System, RAID1: total=32.00MiB, used=16.00KiB

Metadata, RAID1: total=1.00GiB, used=255.61MiB

GlobalReserve, single: total=16.00MiB, used=0.00B

[kyis]

I confirm this works:

btrfs fi df /mnt/cache
Data, RAID1: total=101.00GiB, used=98.05GiB
System, RAID1: total=32.00MiB, used=16.00KiB
Metadata, RAID1: total=1.00GiB, used=64.62MiB
GlobalReserve, single: total=16.00MiB, used=0.00B

Thanks!

[levster]

I just added a second cache disk and am getting the same Cache pool BTRFS too many profiles message. Here are the outputs before and after the re-balance:

 

before:

 

Data, RAID1: total=172.00GiB, used=140.41GiB
System, RAID1: total=32.00MiB, used=48.00KiB
Metadata, RAID1: total=1.00GiB, used=306.72MiB
GlobalReserve, single: total=28.53MiB, used=0.00B

 

and after:

 

Data, RAID1: total=141.00GiB, used=140.41GiB
System, RAID1: total=32.00MiB, used=48.00KiB
Metadata, RAID1: total=1.00GiB, used=307.00MiB
GlobalReserve, single: total=28.77MiB, used=128.00KiB

 

I still see the message displayed. Should I reboot for it to go away or do something else?

 

 

[JorgeB]

The message appears during the balance, it's normal, pool is fine now.

[levster]

I rebooted and the message went away. 

 

Thank you. 

[JorgeB]

@bonienlwas thinking it might be a good idea to remove this notification, btrfs has fixed for while now the issue that resulted in multiple profiles, most users getting this will be during a cache upgrade/downgrade or profile change.

 

Another option would be add something like "this warning is normal during a cache pool balance while the profile is being changed"

[bonienl]

Is it okay to add "You can ignore this warning when a cache pool balance operation is in progress" ?

 

Ps. adding text is a lot easier than changing the code ....

 

Edited September 7, 2018 by bonienl

[JorgeB]

Yep that's fine, thanks