B860 Pro-A WiFi Boot drive issue.
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113426
Printed Date: 07 Jan 2026 at 1:52pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B860 Pro-A WiFi Boot drive issue.
Posted By: Shadow1234
Subject: B860 Pro-A WiFi Boot drive issue.
Date Posted: 04 Jan 2026 at 11:12pm
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I completely upgraded a system (new system below) and when I wanted to boot Windows from the Samsung 860 EVO 1TB SSD, which was in my old system, the SATA SSD was recognized in the BIOS, but I couldn't select it as a BOOT option. Any tips/BIOS settings on how to fix this please? thx The BIOS is on Version 1.27(Newest to this day) (Motherbord: ASRock B860 Pro-A WiFi / CPU: Intel Core Ultra 5 245K / SSD: Samsung 860 EVO 1TB SSD) |
Replies:
Posted By: Xaltar
Date Posted: 04 Jan 2026 at 11:43pm
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Check your CSM and boot settings in your BIOS. If the drive was set up with CSM and legacy boot enabled it will not be detected as a valid boot device with it disabled. The same applies the other way around too. Looking at the manual for your board's BIOS I couldn't find the CSM settings (usually under the boot menu). If the drive is set up as a UEFI (GPT) drive it requires CSM be disabled If it is set up as MBR (legacy mode) then it requires CSM be enabled All I could find in your manual was the secure boot option, CSM may be enabled and disabled when changing this setting, I don't know for sure as I don't own your board. Try enabling it/disabling it and see if it gives your drive as a boot option afterwards. Failing that, see if you can see your drive if you hit the "F11" key during POST (when the ASRock logo shows). This will pull up the boot selection menu. I hope this makes sense, good luck. ------------- 
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