ZFS promote file system error:not a cloned filesystem

Asked by hung

I have create a zpool called "pooltest" ,afterward I created a clone called "pooltest/clone1" based on snapshot "pooltest@snap1"
I have verified and it's working.
df -h
pooltest /pooltest
pooltest/clone1 /pooltest/clone1
When I issue the command:
                                                     zfs promote pooltest/clone1
However,I see the notification: "Cannot promote 'pooltest/clone1': not a cloned file system
How can I fix it ?

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Bernard Stafford (bernard010) said :

Did you try the input of: sudo zpool status pool-test
ZFS documentation: https://wiki.ubuntu.com/Kernel/Reference/ZFS
ZFS clone can only be created from a ZFS snapshot then a clone.

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