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What does this PR do?
Some fixes for the disks grain changes in 2016.3.0.
What issues does this PR fix or reference?
#33578
Previous Behavior
The disks grain would throw a ValueError exception if
rotationrate
returned(unknown)
ingeom disk list
because it tries to cast the data to an integer.The grain would include cd-rom drives.
New Behavior
The datatype parsing is more resilient and will return None if the expected data type is not present.
The grain will not include cd-roms.
Tests written?
No