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Chapter 6. RAID
What is RAID
Redundant Array of Independent Disks (RAID) is a technology that provides increased storage functions and
reliability through redundancy. It also can improve data storage reliability and fault tolerance compared with
single-drive storage systems. Data loss resulting from a drive failure can be prevented by reconstructing
missing data from the remaining drives.
When a group of independent physical storage drives is set up to use RAID technology, they are in a RAID
array. This array distributes data across multiple storage drives, but the array appears to the host computer
as one single storage unit. Creating and using RAID arrays provides high performance, such as the expedited
I/O performance, because several drives can be accessed simultaneously.
RAID Level
Your computer must have the minimum number of SATA storage drives installed for the supported level of
RAID below:
• RAID 0: striped disk array
– Consists of at least two SATA storage drives
– Supported strip size: 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB
– Better performance without fault tolerance
• RAID 1: mirrored disk array
– Consists of two SATA storage drives
– Improved reading performance and 100% redundancy
• RAID 5: block-level striped disk array with distributed parity
– Consists of at least three SATA storage drives
– Supported strip size: 16 KB, 32 KB, 64 KB, or 128 KB
– Better performance and fault tolerance
• RAID 10: striped and mirrored disk array
– Consists of at least four SATA storage drives
– Supported strip size: 4 KB, 8 KB, 16 KB, 32 KB, or 64 KB
– Better performance without fault tolerance
– Improved reading performance and 100% redundancy
Configure the system BIOS to enable SATA RAID functionality
To enable SATA RAID functionality:
1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.
2. Select Devices ➙ ATA Drive Setup and press Enter.
3. Select Configure SATA as and press Enter.
4. Select RAID and press Enter.
5. Press F10 or Fn+F10 to save the changes and exit.
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