Storage Spaces - volume with deduplication always flagged as "online filesystem check needed"

Question

Hi,
I am using Storage Pools and we have quite some Volumes on them. 
I am noticing an warning to do an online check of a Volume on 2 volumes where dedup is activated. 
If I do the check, all is fine for about 10-30 minutes, and it's flagged again to be checked. It never sais it needs any repair. 
The odd thing is, other volumes without DEDUP don't show this behaviour. 
What could cause this error?
- Disk Space is enough available. 
- Logs don't tell a lot. We have quite some entries with low disc space, but as there are volumes with DPM on this machine, it's referencing DPM Volumes with low disc space warnings. (Info - no DEDUP activated on DPM Volumes as it's not supported). 
So basically why are deduped volumes (successful deduped with over 40 %), always in a state that needs a check?
Thanks
Patrick

Answer 1

I have the same problem. 
In upgrading the storage pool from 2012 to 2012 R2 (new installation). 
It looks good 
Try a variety of methods, the last one is garbage collection. 
I looked inside tips Best Practices Analyzer does not clean up the garbage, so try. 
PS script (requires administrator privileges)
Get-Volume
#Replace the letter H
repair-volume -DriveLetter H -Scan
#Replace the letter H
Start-DedupJob H: –Type GarbageCollection -full -Memory 50
Get-DedupJob
G yc {Son of VB.NET}