found. The count in 'mismatch_cnt' is the number of sectors
that were re-written, or (for 'check') would have been
re-written. As most raid levels work in units of pages rather
- than sectors, this my be larger than the number of actual errors
+ than sectors, this may be larger than the number of actual errors
by a factor of the number of sectors in a page.
bitmap_set_bits