This article gathers documentation related to disk replacement for the appliances that belong to S-Series.
S200 Series Hard Disk replacement:
https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/symantec-security-software/web-and-network-security/hardware-appliances/1-0/S-Series-WebGuide/S200_Welcome/S200_FRUs/S200_Drives.html
S400 Series Hard Disk replacement:
https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/symantec-security-software/web-and-network-security/hardware-appliances/1-0/S-Series-WebGuide/S400_Welcome/S400_FRUs/S400_Drives.html
S500 Series Hard Disk replacement:
https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/symantec-security-software/web-and-network-security/hardware-appliances/1-0/S-Series-WebGuide/S500_Welcome/S500_FRUs/S500_Drives.html