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Description of problem: Cockpit's VDO UI on the Storage page currently has a "Transfer data asynchronously" option, which controls the value of "--writePolicy" during create. Dennis Keefe asked us to drop this, as VDO now auto-detects the correct value so that the user does not have to decide this any more. Setting the wrong option could put the VDO storage into an unsupported state later on.
This is also a great usability improvement, as it's really hard to explain to users what this option does and what the correct value is.
I filed an upstream PR (https://github.com/cockpit-project/cockpit/pull/8679) which just removes the `--writePolicy` option completely.
Dennis, please confirm that this is the approach which you had in mind. (This is urgent due to RHEL dev freeze already being over).
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2018:1066