HTPC & Mini PC - Deskmini X300 - no boot from SATA after upd.v2.10

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Deskmini X300 - no boot from SATA after upd.v2.10

Printed From: ASRock.com
Category: Media&User's Review
Forum Name: HTPC & Mini PC
Forum Description: ASRock HTPC & Mini PC Products
URL: https://forum.asrock.com/forum_posts.asp?TID=106953
Printed Date: 21 Apr 2025 at 2:15am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Deskmini X300 - no boot from SATA after upd.v2.10

Posted By: Magiceye04
Subject: Deskmini X300 - no boot from SATA after upd.v2.10
Date Posted: 20 Apr 2025 at 3:38am

Hello,

I updated the UEFIBIOS of my X300 from 1.60 to 2.10 to install a new CPU.

The update was done, it rebooted and after this the SATA SSD containing Windows10 in MBR (upgraded from previous Win7 installation some years ago) was not recognized to boot. I cannot find it any more in the list of selectable boot devices.

The CSM option was disabled. So I tried to enable it. But after restart CSM is always disabled, no matter what I set before.

1. What settings are needed to boot a MBR based Windows10 from SATA SSD?
2. Why is CSM option not saved? Other settings in the UEFIBIOS are changed and saved correctly.
3. May I try to get back to Bios 1.70? The "new" CPU will be 3200G which is running with this version.

The SATA SSD itself is visible, when I boot Ubuntu. It is just that I cannot select it for boot any more in the UEFIBIOS.

Replies:

Posted By: Magiceye04
Date Posted: 20 Apr 2025 at 3:56am

In advanced\storage I also see the SATA SSD.

Posted By: Magiceye04
Date Posted: 20 Apr 2025 at 4:42am

OK, the root of the evil was "secure boot". When I disable it, I can save the CSM settings. And then the SATA SSD came back.