Chapter 6. Configuring RAID
This chapter provides information about storage drive requirements for Redundant Array of Independent
Disks (RAID) levels, and instructions on how to configure RAID for your computer.
An Introduction to RAID
RAID is a technology that provides increased storage functions and reliability through redundancy.
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 drive groups configured according to certain RAID levels also 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.
Note:
For RAID 0, the missing data resulting from a drive failure cannot be reconstructed.
Storage drive requirements for RAID levels
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
– Consists 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
– Consists of two identical storage drives
– Improved reading performance and 100% redundancy
Entering the Intel RST configuration utility
This topic provides instructions on how to enter the Intel RST configuration utility.
Enabling RAID from ThinkPad Setup
If RAID is disabled, you must enable it manually before entering the Intel RST configuration utility.
To enable RAID, do the following:
1. Restart the computer. When the logo screen is displayed, press F1 to start the ThinkPad Setup program.
2. Select
Config
➙
Storage
➙
Controller Mode
➙
RST mode
and then press Enter.
3. Press F10 to save changes and exit.
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