Currently I am experiencing the following.

Using the -o options to send data to multiple different sized destination partitions, n2disk will fill up the first to the limit, then start rotating the information on all drives Below is an example of the output drives after /data4 attained 97% limit set by the execution options

/dev/sde1 12T 12T 411G 97% /data4
/dev/sdf1 29T 12T 17T 42% /data5
/dev/sdc1 53T 12T 41T 23% /data2
/dev/sdd1 53T 12T 41T 23% /data3

I found that data[2,3,5] will never increase in storage over the sizes shown - all will maintain the 12T limit imposed by /data4 - I reached this conclusion as the data shown is quite a while after data4 reached 97%, as well as by executing df and observing bytes deleted then written on the disks that were not yet full

this is how I start it /usr/bin/stdbuf -oL /usr/bin/n2disk --syslog --daemon -i fbcard:0:b00 -P /var/run/n2disk.pid -o /data3/pcap/ -o /data2/pcap -o /data4/pcap -o /data5/pcap -A /data2/timeline --disk-limit 97% -b 16384 -p 2048 -C 16384 -q 1 -c 34 -w 36,38,44,46 --index -3 -Z -z 48,50,52,54

n2disk v.3.6.230113 (r5273)