How to calculate the amount of data written to the server?

Question

RAID

There was a need to replace the HDD database server with an SSD. To begin with, I got stuck on such a banal problem, how to calculate the current amount of recorded data?
Ideally, of course, you would get a program that would calculate how much data is written to disks per week, select an SSD from this data.
HP DL 360G6 Server, HP Smart Array P800 Controller

Answer 1

can try to estimate the volume of the transaction log for the period?

Answer 2

df -h to cron every 15 minutes

Answer 3

well, look at the busy place now and in a week