dasd-eckd.0ec8bb <bus ID of the DASD>: Reading device feature codes failed (rc=<return code>) for new path <path mask>
Explanation
A new path has been made available to the a device.
A command to read the device feature codes on this device returned an error.
The new path will not be used for I/O.
User response
Set the new path offline and online again to repeat the path verification.
Alternatively, set the device offline and online again to
verify all available paths for this device.
If this problem persists, gather Linux debug data and report the problem
to your support organization.