Promise Technology 2-Year Extended Warranty for VessR2000 RAID Head - Manual (Page 587)

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Vess R2000 Series Product Manual Promise Technologies
with (4) 100 GB physical drives has a capacity of 200 GB.
RAID 6 becomes more capacity efficient in terms of physical drives as the number of physical drives increases.
RAID 6 provides double fault tolerance. Your logical drive remains available when up to two physical drives fail.
RAID 6 is generally considered to be the safest RAID level.
A RAID 6 on Vess consists of 4 to 32 physical drives.
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