For your workload, you can work with your account team to figure out what your FA utilization is at a given IO rate.  Once you know that, you can figure out what IO rate will correlate to a given utilization rate.  There are 4 IO types a FA CPU can perform, and all of them have different maximum rates.  Also IO size can make a big difference.
Experts,  Using symstat I can retrieve various performance statistics regarding disks/pools/ports etc. However, I am interested in finding out percentage utilisation of FA ports and symstat have no option for the same. I know I can do this using Performance Analyser but I want to know a command which I can use in a script to produce graphs in crontab.  Please share the command if there's any. Cheers Ketan
symcli command to check FA percentage utilisation