my server has four hard drives two of them are 73 GB (SAS) and are in RAID 1, the other two hard drives are 450 GB (SAS) and are also available in RAID 1, What is RAID 1 is simple means that my server in case one of the two hard drives breaks will have another one that can be used without any interruption, information about my server: Dell Poweredge R610 (24GB RAM, HDD 450GB RAID 1, 24 x Intel (R) Xeon (R) CPU X5650 @ 2.67GHz 2 Sockets, OS: Debian Proxmox VE)