RAID 50 can sustain one to four drive failures while maintaining data integrity, if each failed disk is in a different RAID 5 array.
Uses | Works best when used with data that requires high |
| reliability, high request rates, high data transfer, and |
| medium to large capacity. |
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Strong Points | Provides high data throughput, data redundancy, and very |
| good performance. |
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Weak Points | Requires 2 to 4 times as many parity drives as RAID 5. |
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Drives | 6 to 30 |
| The initiator takes one ID per channel. This leaves 15 IDs |
| available for each channel. |
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Figure 3.5 shows a RAID 50 array with six disk drives.
Figure 3.5 RAID 50 Array
MegaRAID Controller
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| Data Flow |
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| RAID 5 |
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| RAID 5 |
|
Disk 1 | Disk 2 | Disk 3 | Disk 4 | Disk 5 | Disk 6 |
Segment 1 | Segment 2 | Parity | Segment 3 | Segment 4 | Parity |
Segment 6 | Parity | Segment 5 | Segment 8 | Parity | Segment 7 |
Parity | Segment 9 | Segment 10 | Parity | Segment 11 | Segment 12 |
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| RAID 0 |
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RAID Levels |
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