FAQ : what is the different between Precopy and Reconstruction process ?

Publication Date:  2015-06-08 Views:  232 Downloads:  0
Issue Description

customer asked : what is the different between Precopy and Reconstruction process ?

Solution

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

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