Red Hot RAID 6
The fastest RAID 6 available
RAID 6 eliminates the risk of data loss if a second hard disk drive fails while the RAID array is rebuilding. In a 3ware RAID 6 system, two sets of parity are calculated, written, and rotated across all the drives. This second simultaneous P + Q parity calculation allows the array to survive up to two drive failures without losing data, for significantly improved fault tolerance. RAID
RAID 6 represents a sea change in the RAID landscape. It provides the industry with higher levels of data protection, data availability and fault tolerance than RAID 5. By assuring data availability following a second drive failure, users can rest assured that they are enjoying maximum data protection, both in normal and degraded modes. And, with RAID 6 enabled 3ware controllers, RAID 6 will not cripple performance.
RAID 6 Enabled 3ware Controllers
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Host Data
Disk #1 | Disk #2 | Disk #3 | Disk #4 | Disk #5 |
P1 Parity | Q1 Parity | Block 1 | Block 2 | Block 3 |
Block 4 | P2 Parity | Q2 Parity | Block 5 | Block 6 |
Block 7 | Block 8 | P3 Parity | Q3 Parity | Block 9 |
Block 10 | Block 11 | Block 12 | P4 Parity | Q4 Parity |
| Striped Data with Distributed Double Parity — RAID 6 |
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3ware RAID 6: Two sets of parity data, P + Q, are striped across disks. RAID 6 safeguards against data loss during rebuild mode by allowing up to two consecutive drive failures for maximum fault tolerance.
•High capacity systems with eight or more high capacity drives
•For enterprise/mission critical installations
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