Volume transformation

[jeyare]

Today morning I started last etx4 volume transformation to btrfs.
All Shared folders are already transferred from the volume. Done.
There is still last "mess" of 164kB in the volume and I need to know, that is it ok, when I will passed it away. Then a recommendation is wanted. Thx

the mess:
root@DISKARRAY_1813:/volume2# sudo du -h | sort -rh | head
164K .
44K ./@tmp
28K ./@tmp/@eaDir
20K ./@synologydrive
16K ./@synologydrive/@sync
16K ./lost+found
16K ./@download
8.0K ./@tmp/@SynoDrive
8.0K ./@tmp/@eaDir/Torrent.1568375062
8.0K ./@tmp/@eaDir/SC_Download.1568375386

Storage manager still sees 204,16MB in the volume (include previous 164kB). How to check it, if is it just by RAID1, or if there is something hidden.
Thx gents

 

[jeyare]

Solved by myself:
1. Find the processes by running the "lsof" command on the volume:
lsof /volume2
.... nothing

2. to be sure also by exteded lsof:
lsof | grep volume2
.... nothing

so then I can umount the volume2:
umount /volume2/
done .... NAS is beeping and Storage Manager is informed me, that Volume 2 crashed. OK.

Remove Volume, then Create new Volume2 by existing Storage Pool, but with new FS: btrfs
done

PS:
if you have HotSpare disks, you don't need re-manage the spare disks, because there is still link between Storage pool (used for renewed Volume). Great.