Sony VGX-XL2 User Guide (Computer Component) User Manual page 147

Which RAID level should I use?
The right choice of RAID level depends on the application for which it is used.
The chart below illustrates possible applications for each level of RAID
supported by Sony.
Level
0
1
5
144
No. of
Drives Application requires:
2 - 3 High speed storage, but not redundancy.
2 - 3 Redundancy with fast write options. Entry-
level systems where only two hard disc
drives are required.
3 Good performance for Reads, slower for
Writes (requires parity data be updated
each time. May provide higher
performance if I\O is random and in
smaller chunks).
VGX-XL2A Digital Living System