RAID5 reconstruction ?

Hi all,

Say If I have a RAID 5 array of 50GB of five disks of 10GB each.

I have data of 5GB. When a disk fails and replaced with a spare disk.
Will the reconstruction happen only for the 5GB allocated disk blocks
or it will happen for the whole disk size.


Is it possible to make  reconstruction intelligent enough to keep it optimized ?

Thanks.

-- 
Regards,
Sandeep.





 	
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