What does the status Initializing indicate about what the FortiAnalyzer is currently doing?

On the RAID management page, the disk status is listed as Initializing.

What does the status Initializing indicate about what the FortiAnalyzer is currently doing?
A . FortiAnalyzer is ensuring that the parity data of a redundant drive is valid
B . FortiAnalyzer is writing data to a newly added hard drive to restore it to an optimal state
C . FortiAnalyzer is writing to all of its hard drives to make the array fault tolerant
D . FortiAnalyzer is functioning normally

Answer: C

Explanation:

Reference: https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/attachments/4cb0dce6-dbef-11e9-8977-00505692583a/FortiAnalyzer-5.6.10-Administration-Guide.pdf (40)