This currently causes a lot of false positives, because in many cases our
threshold is either overly pessimistically low, or the raw value is implausibly
high. Just use the normalized values vs. threshold for now.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=25772
Bug-Ubuntu: https://launchpad.net/bugs/438136
Gbp-Pq: Name 0002-Drop-our-own-many-bad-sectors-heuristic.patch