Hi,Sanjivala,
1. Go to Hardware Universe Portal:
https://hwu.netapp.com/
2. Select your Platform (FAS/AFF) & Data Ontap version and click 'show-results'.
3. Go to Supported RAID Configuration | Under RAID4 - Look for 'Drive Capacity Max'
The screenshot uses FAS8300 as an example.Please search based on the actual storage model.