In an attempt to understand what is going on with my disks, I went into Mac OS X's Terminal and typed:
diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_RAID 499.8 GB disk0s2
3: Apple_Boot Boot OS X 134.2 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk1
1: EFI 209.7 MB disk1s1
2: Apple_RAID 499.8 GB disk1s2
3: Apple_Boot Boot OS X 134.2 MB disk1s3
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS SERVER *999.5 GB disk2
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk3
1: EFI 209.7 MB disk3s1
2: Apple_HFS Server HD 998.5 GB disk3s2
3: Apple_Boot Recovery HD 650.0 MB disk3s3
4: Apple_HFS Recovery HD 860.9 MB disk3s4
so, I'm guessing the the disk2 is the result of the RAID set, with disks 0 and 1 in it. When I load this disk into fdisk, though, I can't really understand it, since it only displays zeroes when I do a p command.
If there's no boot partition, how can I boot from this RAID set? How do i interpret fdisk's output and how to activate the partition in order to be able to load Mac OS X from it?