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Overview
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RAID5/RAID6
diagonal striped parity
redundancy + storage efficiency
Data is striped across drives at block level
Parity drive(s) staggered on each stripe
1 parity drive per stripe (RAID5) or 2 (RAID6)
TERRIBLE
for database performance
WORSE
for fileservers than most ppl think
FREQUENTLY
less efficient than ppl think
Best suited to VERY large file service, backups, sharply limited user count
redundancy + storage effiency
redundancy + storage efficiency