Well thanks to the help of autourdupc, my Storcenter is up and running again and has actually been updated to a 1.5 TB Raid 1 array instead of a 500mb Raid 1 array.
I think my problem actually came from I never changed the factory drive RAID setting from 0 to 1. I went for capacity over redundancy/safe backup. When the first drive failed, the second was lost and became corrupt. Now with Raid 1 and larger dives, they are mirrors and solid backups.
Just to the answer to the question I posted above as to the correct partition sizes for the original 500mb drives, they are:
Dispositivo Boot Start End Blocks Id System
/dev/sdb1 1 8225279 4112639+ fd Autorilevamento raid di Linux
/dev/sdb2 8225280 9253439 514080 fd Autorilevamento raid di Linux
/dev/sdb3 9253440 976768064 483757312+ fd Autorilevamento raid di Linux
This is the fdisk listing. Very important about partion 1 starting at sector 1. This is done on the advanced settings in fdisk.
Once created, just use Clonezilla image on partition 1 on both disks re-install them in the NAS enclosure and let it boot up then sign into the admin settings and tell it to format to the scheme you would like. They will format out and go online and you are back in business.
Thanks again to autourdupc for all the help. You Rock!