When I type
mdadm --detail /dev/md0
I get a lots of useful information most of which I understand. However I also get a line that reads:
Events : 0.710
Where the number varies.
Naively, I thought an event either happened or it didn't. How can I have only 0.710 of an event? Or if you prefer why is "Events" not an integer value?
After seeing user's answer below, I dug into the code a bit and found
`#if __BYTE_ORDER == __BIG_ENDIAN
144 __u32 events_hi; /* 7 high-order of superblock update count */
145 __u32 events_lo; /* 8 low-order of superblock update count */
149 __u32 events_lo; /* 7 low-order of superblock update count */
150 __u32 events_hi; /* 8 high-order of superblock update count */
So "Events" is high-order and low order of "superblock update count" https://raid.wiki.kernel.org/index.php/Superblock