CHAPTER 4: Installing Components
Configuring your onboard RAID solution
Your server comes equipped with an onboard chipset for a SATA RAID solution, which supports RAID levels 0 (striping), 1 (mirroring), 5 (distributed data and parity), and 10 (RAID 0 + 1). You enable the onboard RAID solution in the BIOS (See “RAID Setup” on page 76) and configure RAID by launching the appropriate RAID BIOS console during the boot process.
Configuring the onboard SATA RAID solution
| Level | Description and use | Pros | Cons | Number of | Fault |
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0 | Data divided into blocks and | High data | No fault tolerance. | One or two | No |
| distributed sequentially (pure | throughput for | Data is lost if a drive | (on this |
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| striping). Use for | large files. | fails. | server) |
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| that requires high performance. |
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1 | Data duplicated on another disk | 100 percent | More disk space | Two | Yes |
| (mirroring). Use for | data | required. Reduces |
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| redundancy, | usable disk space to |
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| providing fault | the size of the |
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| tolerance. | smallest drive. |
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| Reduced |
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| performance during |
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| rebuilds. |
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5 | Stripes data at a block level across | Fast and | More disk space | Three | Yes |
| several drives and distributes parity | redundant | required. Reduces |
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| among the drives. No single disk is |
| usable disk space to |
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| devoted to parity. |
| 75% of total storage |
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| in the disk array. |
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10 | A combination of RAID 1 and RAID | Fast and | An additional drive | Four | Yes |
| 0. Raid 0 is used for performance, | redundant | required. |
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| and RAID 1 is used for fault |
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| tolerance. |
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