Windows 11 RAID1 Installation: Inaccessible Boot Device

Inaccessible Boot Device: First Reboot Windows 11 RAID1 Installation

Abstract: This article provides a solution for the 'Inaccessible Boot Device' error encountered during the first reboot of a Windows 11 RAID1 installation. Learn how to troubleshoot and resolve this issue.

Created: 2025-03-23 by UserComp.com Editors

Installing Windows 11 on a RAID 1 array configured motherboard involves several steps. Here's a detailed guide to help you through the process.

Preparation

Ensure your motherboard supports RAID 1 and has the necessary BIOS settings to create a RAID array.
Prepare two identical hard drives or SSDs with the same capacity. Format them with the NTFS file system.
Enter the BIOS setup and create a RAID 1 array using the motherboard's built-in RAID utility.
Save and exit the BIOS setup, allowing the system to boot from the RAID array.

Windows 11 Installation

Insert the Windows 11 installation media into your system. Restart your computer and boot from the installation media.
During the installation process, when you're prompted to select the installation drive, select the RAID array.
Windows will now attempt to load the necessary RAID drivers. If the drivers are not loaded automatically, you may need to install them manually.
After the drivers are loaded, Windows should recognize the RAID array and proceed with the installation.
Follow the on-screen instructions to complete the Windows 11 installation.

Post-Installation

After the installation is complete, you may need to configure the RAID array settings in the Device Manager.
Install any remaining device drivers and updates to ensure your system is running smoothly.

Code Blocks

# Boot from installation media
bootmgr /bootcount

# Enter BIOS setup
del bootmgr /bootcount

# Create RAID array in BIOS setup
# (This will vary depending on your motherboard model)

# Save and exit BIOS setup

# Boot from RAID array
bootmgr

References

Microsoft Docs: Configure a RAID array
Tom's Hardware: How to Install Windows 11 on a RAID Array
TechRadar: How to install Windows 11 on RAID 1

Tags: Windows RAID Installation Boot Device

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