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VessRAID Setup - Promise Technology, Inc.

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<strong>VessRAID</strong> 1000i Series Product Manual<br />

RAID 60 – Striping of Double Parity<br />

RAID 60 combines both RAID 6 and RAID 0 features. Data is striped across<br />

disks as in RAID 0, and it uses double distributed parity as in RAID 6. RAID 60<br />

provides data reliability, good overall performance and supports larger volume<br />

sizes.<br />

Data<br />

Stripes<br />

Figure 8. RAID 60 is a combination of RAID 6 and RAID 0<br />

Double Distributed Parity<br />

Disk Drives<br />

Figure 9. RAID 60 Striping of Double Distributed Parity disk arrays<br />

The total capacity of a RAID 60 logical drive is the smallest physical drive times<br />

the number of physical drives, minus four.<br />

RAID 60 also provides very high reliability because data is still available even if<br />

multiple physical drives fail (two in each axle). The greater the number of axles,<br />

the greater the number of physical drives that can fail without the RAID 60 logical<br />

drive going offline.<br />

Component Minimum Maximum<br />

Number of Axles 2 16<br />

Physical Drives per Axle 4 32<br />

Physical Drives per Logical Drive 8 256<br />

254<br />

Axle 1<br />

Axle 2

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