User Manual

Table Of Contents
559
Product Manual Technology Background
• FileandApplicationservers
• WWW,E-mail,andNewsservers
• Intranetservers
RAID 6 – Block AnD DouBle PARIty StRIPe
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