HP ML150 G6 Raid 5 expand

Hi,

currently we have  HP ML150 G6 with HP Smart Array P410/256MB RAID Controller 

configuration : 3 physical drive @500 GB , SAS hot plug Raid 5 , at slot 2

the question is , is it possible to expand the capacity of this raid by :

1. Adding another physical drive @500GB ?

2. Changing all drive to a higher capacity , eg : 2TB each ?

i believe if the above is possible , there won't be any downtime since it is hot plug.

Thanks

BR,

Frans