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8 Cards in this Set
- Front
- Back
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RAID 0 |
Data striped across disks |
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RAID 1 |
Data is mirrored |
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RAID 0+1 |
2 RAID 0 striped systems RAID 1 -ed together |
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RAID 1+0 |
Raid 1 pairs Raid0 - ed together |
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Raid 4 |
Parity calculated across stripes on each disk Parity stored on specialised parity disk |
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RAID 5 |
Like raid 4 but parity is striped across all disks - parity is stored on the disks Unlike raid4, avoids the bottleneck at the parity disk With lots of disks it's possible to have two failures at the same time Or one of the other disks in the array fails on rebuild |
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RAID 6 |
Like RAID 5 but the parity for each stripe is written on 2 disks - can tolerate two disk failures but loses space/performance |
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RAID 5 +1 |
Speed of raid0 without the danger But two drive failures in one raid 5 will destroy the array |
