![]() ![]() Which one did Windows use to boot? Of course, this is assuming that the physical drive Windows used to boot is the same physical drive that contains the MBR. Now, I get the mapping from Logical Drive to Physical Drive and I discover that there are two physical drives used by that volume. Now, that means we have at least two physical drives. Assume that C: is using a mirrored RAID setup. Knowing which logical volume Windows used to boot doesn't help me here. On the other hand, a logical drive is identified by a string of the form, "\\.\x" where x is a drive letter.Įdit to discuss a few of the ideas that were thrown out. Physical disk drives are of the form "\\.\PHYSICALDRIVEx" where x is a number. The way I want to identify the device is with a string which will identify a physical disk drive (as opposed to a logical disk drive). On my dev box I have two hard disks, and when I look at the contents of the first couple of sectors on either of the hard disks I have a standard boiler plate MBR. Just reading the first sectors of the hard disk isn't reveling anything. In other words, I need a way from Windows to determine which drive the BIOS is using to boot the whole system.ĭoes Windows expose an interface to discover this? With how big the Windows API is, I'm hoping there is something buried in there that might do the trick. If you require further assistance, contact Technical Support.I'm need to find a method to programmatically determine which disk drive Windows is using to boot. Restart the computer with the installation media removed to check if the repair worked. ![]() ![]() It lets you boot from the Windows installation media or a bootable disk or flash drive.Ĭlick the Repair your Computer link at the bottom of the Install Now screen.Įnter the following three commands in turn, following each by pressing the Enter key: Use the F12 key at the Dell Splash screen to enter the boot menu. Switching the UEFI to Legacy might help you solve the issue when a selected disk is not a fixed MBR in Windows 10. GPT is associated with UEFI boot mode, while MBR disk is closely related to old legacy BIOS. These steps apply to any legacy drive used as a boot drive on any recent Windows Operating System. How to Fix the Selected Disk Is Not a Fixed MBR Disk 3 Solutions. How to repair your Main Boot Record (MBR) Windows 10 (before Version 1709), Windows 8, and Windows 7:įirst run the command below to back up the old BCD: Verify that the EFI partition (EPS) is using the FAT32 file system and assign a drive letter to it that is not already in use. Select Command Prompt from the Recovery Options. Verify that the EFI partition (EPS - EFI System Partition) is using the FAT32 file system. Assign a drive letter to it that is not already in use: Select the operating system, and click next. Assign a drive letter to it (Assign a letter that is not already in use.): Verify that the EFI partition (EPS) is using the FAT32 file system. Select Command Prompt from the Troubleshoot screen: The timing for this option was shortened from that in Windows 7. Tap rapidly on the key once the personal computer has turned on, but before the Windows Splash Screen appears.īe aware this may take several attempts. Verify that the EFI partition (EPS - EFI System Partition) is using the FAT32 file system. Insert the Media (DVD/USB) in your personal computer and restart. Verify that the EFI partition (EPS) is using the FAT32 file system and assign a drive letter to it that is not already in use: Select Command Prompt from the Advanced Options tab in the Troubleshoot screen: Select Repair your computer from the menu that appears. Welcome Restore MBR from backup, Hide/Unhide Partitions, Boot Menu: Select bootable partition Wipe MBR, Set Bootable/Active Partition, Read/write a persistent. Use one of the methods in the following article to boot into the Windows Advanced Startup Options Menu:īooting to the Advanced Startup Options Menu in Windows 11, and Windows 10 If you do not have the Installation Media: Note: If you are running Windows 10 (version 1709 or newer), ignore step 8 and go to the information at the end of this section of instructions. ![]()
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