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Forum Discussion
Received a ReadyNAS Alert Message Volume:alert email from the RN10200 unit
I recently receive this ReadyNAS Alert Message Volume:alert email that the unit had less than 20% of volume media's capacity is free, however the actual usage is 2.21 TB Free of 2.72 TB or 81% free.
Is there an issue? Why the alert when so much free space is still available? Has anyone encountered this situation? Is there something affecting the system I need to investigate?
4 Replies
pmzmarketing wrote:
however the actual usage is 2.21 TB Free of 2.72 TB or 81% free.
You got this backwards. The volume is 81% full (with 19% free space). So the email is correct.
BTRFS does need more free space than ext - one reason is that metadata space is reserved up front with ext, but is dynamically allocated in btrfs. BTRFS "chunks" are also quite large.
Generally you can run into issues when the free space drops to 10% or less. I suggest treating this as a warning, and plan to either delete some files or expand the volume when it reaches ~85%.
I also suggest running balances more frequently as the volume becomes more full. That allows BTRFS to use the free space it has more efficiently.
Thanks Stephan, but no I didn't get it backwards. As you can see on the image below and this is why I have posted the query
pmzmarketing wrote:
Thanks Stephan, but no I didn't get it backwards. As you can see on the image below and this is why I have posted the query
Oops - I misread the original post.
Are you running 6.6.1 with AV enabled? There are some bugs there that are related to this. So you disable AV for now, and see if these alerts stop. There should be a beta posted soon that will have fixes for AV.
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