The tools i need are in
apt-get install sysstat

this will give me the command

iostat -x 5

Where the 5 means tell mne about disk usage for all partitions and disks every 5 seconds…

When you stop the command, running it again will display data since the last run, there is much more that has to do with IOSTAT that i will come to in a bit, this one here is simply the basic command and usage for my referance

IO stat will display something like the following lines for the second disk that has 4 partitions, the first line is the totals

sdb 0.20 0.20 33.20 16.00 728.00 1392.00 43.09 3.87 41.01 3.04 14.96
sdb1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sdb2 0.20 0.00 7.00 0.00 502.40 0.00 71.77 0.06 8.46 7.54 5.28
sdb3 0.00 0.20 25.60 15.40 204.80 1384.00 38.75 3.79 47.41 2.85 11.68