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Chapter 5. 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.
Storage drive requirements for RAID levels
Your computer supports the M.2 Non-Volatile Memory Express (NVMe) solid-state drive.
Note: Ensure that your computer has two identical storage drives installed (two M.2 NVMe solid-state drives
with the same capacity) for supported RAID levels. If only one drive is installed, or two different types of
drives are installed, the following information does not apply.
Your computer supports the following RAID levels:
• RAID 0: striped disk array (missing data resulting from a drive failure cannot be reconstructed)
– Consist of two identical storage drives
– Supported strip size: 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB
– Better performance without fault tolerance
– Higher risk of data loss resulting from a member drive failure compared with non-RAID configuration
• RAID 1: mirrored disk array
– Consist of two identical storage drives
– Improved reading performance and 100% redundancy
• RAID 5: block-level striped disk array with distributed parity
– Consist of at least three SATA storage drives
– Supported strip size: 16 KB, 32 KB, 64 KB, or 128 KB
– Better performance and fault tolerance
Configuring RAID with the Intel RST configuration utility
This topic provides the following instructions to help you configure RAID with the Intel RST configuration
utility:
• How to enter the Intel RST configuration utility
• How to create RAID volumes
• How to delete RAID volumes
• How to reset storage drives to non-RAID
• How to rebuild RAID 1 or RAID 5 volumes
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