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?

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thanks daniel for editing – gaudi_br Oct 20 '11 at 6:57
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