Promise Technology 2-Year Extended Warranty for VessR2000 RAID Head - Manual (Page 588)

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Product Manual Technology Background
RAID 10 – M
IRRoR
+ S
tRIPe
Mirror + Stripe combines both of the RAID 1 and RAID 0 logical drive types. RAID 10 can increase performance
by reading and writing data in parallel or striping, and duplicating the data, or mirroring.
PROMISE implements RAID 10 by creating a data stripe over one pair of disk drives, then mirroring the stripe
over a second pair of disk drives. Some applications refer to this method as RAID 0+1.
Advantages Disadvantages
• High Read data transaction rate
• Medium Write data transaction rate
• Good aggregate transfer rate
• Safest RAID level, except for RAID 60
• High disk overhead – equivalent of two
drives used for parity
• Slightly lower performance than RAID 5
Recommended Applications for RAID 6:
• Accounting and Financial
• Database servers
• Any application requiring very high availability
PROMISE RAID 10 starts with a data stripe, then mirrors it
Physical Drives
Data Mirror
Data Stripes