MediaChanged
bool MediaChanged() const;
virtual void MediaChanged(BDiskDevice *device);
info->io_scheduler->MediaChanged();
MediaChanged(device);
virtual void MediaChanged();
virtual void MediaChanged();
bool changedMedia = device->MediaChanged();
if ((!device->MediaChanged() && (device->HasMedia() || !hadMedia))
|| changedMedia != device->MediaChanged()))
if (device->MediaChanged()) {