Hi Orlando,
Technically replacing the drive will see the RAID configuration rebuild itself, unless it's RAID0 and you've then lost all your data anyways.
I would recommend grabbing a backup of the appliance before replacing the HDD. You can also follow the rebuild as per the TN below:
https://support.symantec.com/en_US/article.TECH86630.html
But also check out the Admin Guide as this should have further steps to replacing the HDD.
Thanks!