customer asked : what is the different between Precopy and Reconstruction process ?
Precopy process :
when the storage system detects that a member disk in a RAID is about to fail , data on that disk is copied onto a hotspare disk reducing risks of data loss.
we can use disk health detection tools to analyze the health status of the disk during the operation of an array
Reconstruction proces :
it is a process of recovering user data and parity data on a failed disk in a RAID group onto a hot spare dis kof a RAID group