Does raid 5 provide fault tolerance

Yes. RAID-5

• Fault-tolerant development of striped volume
• Parity stripe written to each disk in volume
• Parity for set of data always on separate disk from data within set
• If one disk fails possible to reconstruct data from If one disk fails, possible to reconstruct data from parity
• Minimum of 3 HD's required
• Storage efficiency improves as number of HD's increased
• Improvement in speed over single disk