| Understanding arrays | |
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RAID Level 10 | RAID 10 is defined as mirrored stripe sets (also known as | |
| RAID 0+1). You can build RAID 10 either directly through | |
| the RAID controller (depending on the controller) or by | |
| combining software mirroring and controller striping (called | |
| RAID 01). | |
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RAID Level 50 | This RAID level is a combination of RAID level 5 and RAID | |
| level 0. Individual smaller RAID 5 arrays are striped, to give | |
| a single RAID 50 array. This can increase the performance | |
| by allowing the controller to more efficiently cluster | |
| commands together. Fault tolerance is also increased, as | |
| one drive can fail in each individual array. | |
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In RAID 50 applications, this is the name given to the | ||
| individual RAID 5 arrays that are striped together. Each | |
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Optimization and drive selection for RAID 5 arrays
Typical RAID 5 implementations require a number of steps to write the data to the drives. In order to optimize your system performance based on the type of writes you expect in your operation, we have provided detailed information on optimizing the performance using full strip write operations in an appendix (see “Optimizing RAID 5 Write Performance” on page 227).
If you intend to setup a RAID 5 array and want to consider optimum performance, you will need to consider the number of drives, parity drives, and chunk size. You should review the information provided in “Optimizing RAID 5 Write Performance” on page 227. Additional information is provided at the appropriate step during configuration.
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