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6.11.5 issue with btrfs subvolume growing after replacing cache drive

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I previously had a 500 GB cache drive (single disk pool) and replaced it with a 1 TB drive. 

 

I shut down docker and virtual machines, set shares to Cache: Yes and invoked mover. After mover finished I took the 500 GB drive out and put the 1 TB drive in. I flipped the shares to Cache: Prefer and invoked mover. Mover has been going for over 24h now and it has somehow managed to move over 500 GB of data back to the 1 TB drive - which makes no sense since the 500 GB drive was only about 45% full to begin with.

 

Any idea why this is occurring? It appears to be related to btrfs subvolumes - it has been moving them for almost the entire time and somehow growing them to bigger than they were previously.

  • Community Expert

Vdisks are thin provisioned initially, copy back with:

cp --sparse=always /source /dest

 

  • Author
Just now, JorgeB said:

Vdisks are thin provisioned initially, copy back with:

cp --sparse=always /source /dest

is there some way to cleanup what it has already done?

 

Is the right way to do this with /mnt/user or directly to /mnt/diskX and then to /mnt/cache or to /mnt/user/share?

  • Author

took the nuclear option and deleted the /mnt/cache/system/docker and /mnt/user/system/docker folders and I'm starting fresh.

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