Sony VAIO VGX-XL1 User Manual page 136

RAID 5 - Distributed Parity
RAID 5 is the most common secure RAID level. In this level, data chunks are
larger, and data are transferred to disks by independent read and write
operations (not in parallel). Parity information is spread across all drives.
Raid 5 can withstand a disk failure without losing data or access to data. The
failed disk is removed and the data can then be copied to the replacement
disk. RAID 5 can be achieved with software, however a controller is
recommended.
RAID 10 - Striping and Mirroring
RAID 10 combines the features of levels RAID 0 and RAID 1 in a single
system. This allows for faster data access (like RAID 0) and single-disk fault
tolerance (like RAID 1). RAID 10 requires twice the number of disks, but offers
performance improvements by striping the data across an array, and then
mirroring the striped array on a second set of disks.
RAID 10 provides data security by mirroring all data on a secondary set of
disks. This duplication eliminates the overhead and delay of parity. Fifty
percent of capacity is lost to redundancy.
VGX-XL1 Digital Living System 133