Simple RAID 5 Question - Adding a Drive

[Megengo]

Is it possible to add a drive to a RAID 5 array and have the system implement this drive into the array without re-doing the array all together?

Example:
I have 3 1.5TB drives in a RAID 5 with a total of about 2.5TB full. Can I add another 1.5TB drive without backing up the data and reformatting and partitioning?

 

[rmd3003]

Depends on RAID card. Good cards ($$$) support Online Capacity Expansion (OCE) without rebuilding an array. Read manual for your RAID controller.