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cp --reflink not working

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Hello,

I have successfully used this command before to clone a windows 10 vm. I tried to use it yesterday and today in various ways (-- reflink after cp, and at end of line since I have seen it both ways). It fails saying "Operation not supported". I saw a comment on a post about it being broken in CentOS which is based on RedHat linux (I think) so it may not necessarily be the same. Is anyone else having problems with this or is it just me?

Is disk source and target btrfs?  Are you referencing the source and target via /mnt/user or /mnt/diskX?

  • Author

Yes, source and target are btrfs. I am using the command in the VM folder in the domains share which is on the cache drive.

I am using /mnt/user

48 minutes ago, thisaone said:

I am using /mnt/user

Try referencing the disk directly  /mnt/cache and see if it makes a difference.

  • Author

That was it. I must have read or done that by accident last time. It worked through /mnt/cache.

 

Thank you very much.

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