Raid 6 – block and double parity stripe, Raid 6 – b, Lock – Promise Technology 2-Year Extended Warranty for VessR2000 RAID Head User Manual
Page 586: Ouble, Arity, Tripe
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Product Manual
• File and Application servers
• WWW, E-mail, and News servers
• Intranet servers
RAID 6 – B
lock
AnD
D
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P
ARIty
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RAID level 6 stores dual parity data is rotated across the physical drives along with the block data. A RAID 6
logical drive can continue to accept I/O requests when any two physical drives fail.
Hence, a RAID 6 logical drive with (7) 100 GB physical drives has a capacity of 500 GB. A RAID 6 logical drive
Advantages
Disadvantages
• High Read data transaction rate
• Medium Write data transaction rate
• Good aggregate transfer rate
• Most versatile RAID level
• Disk failure has a medium impact on
throughput
RAID 6 stripes all drives with data and dual parity
Data
Blocks
Physical Drives
Double Distributed (Wide-space Q+Q) Parity