Promise Technology VTrak 15110 - Manual (Page 221)

Chapter 7: Technology Background
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RAID 50 – Striping of Distributed Parity
RAID 50 combines both RAID 5 and RAID 0 features. Data is striped across
disks as in RAID 0, and it uses distributed parity as in RAID 5. RAID 50 provides
data reliability, good overall performance and supports larger volume sizes. RAID
50 also provides high reliability because data is still available even if two disk
drives fail (one in each data stripe).
Figure 6. RAID 50 Striping of Distributed Parity disk arrays
RAID 50 disk arrays on VTrak consist of 6 to 15 disk drives.
Data
Stripe
Distributed Parity
Disk Drives