I recently setup a hardware raid 0. I was interested in setting up a raid 5 array for the redundancy aspect, but hardware raid 5 controllers are too expensive. After reading a few pages, I have decided to setup a linux software-based raid 5 array. I plan to use the following howtos.
Linux Software RAID
The Software-RAID HOWTO
Linux Software RAID
RAID 5 improves on RAID 4 by striping the parity data between all the disks in the RAID set. This avoids the parity disk bottleneck, while maintaining many of the speed features of RAID 0 and the redundancy of RAID 1. Like RAID 4, RAID 5 can survive the loss of a single disk only. RAID 5 is supported by Fedora Linux. Figure 26.2 illustrates the data allocation process in RAID 5. Linux RAID 5 requires a minimum of three disks or partitions.
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