[6.9.1] R/W counters don't increment despite disk activity

My guess is this is related to the spindown fix in 6.9.1.

I'm rsync-ing from the 3rd partition (Data) of a disk mounted through UD. You can see reads at 14.7MB/s:

If I switch the view to counters though it shows 0 reads:

I suspected the R/W rate looks at disk-level stats but the counters look at partition-level stats and only the 1st partition (so my sync from partition 3 doesn't register.)

I confirmed this by running an rsync from the 1st partition:

rsync --dry-run -avc --progress /mnt/disks/APconfig /tmp/

And as expected the counters increment and the disk is reported active:

I think the fix is to track the sum of disk stats over all partitions but I can imagine why you didn't.

nas-diagnostics-20210318-1256.zip