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Summary



This article describes how to recover a system when it fails to boot after a BMR. This condition may occur for AROS restore (Block restore from DPX open storage) of UEFI-based servers.

Symptoms



If the BMR fails to run the post-restore scripts, then the system may be unable to boot and the following message is displayed:

The Boot selection failed because a required device is inaccessible.

The BMR post scripts performs the following configuration functions:
  • Configure drive letter.
  • Set the active partition.
  • Adjust the MBR or EFI boot configuration.
  • Adjust hardware configuration.
  • Reset the CJ.
If the drive letter reassignment fails for the system volume, then the other configuration functions cannot be performed.

Resolution



It is possible to manually configure a system if the BMR post script fails. In such cases, use the following procedure to recover the system:

1. Boot the system using the BMR ISO. Wait for the GUI to open.

2. From the File menu, select the Command prompt.

3. Type Diskpart. Enter commands as shown:

 

diskpart> select disk 0
diskpart>select partition 1
diskpart>active
diskpart>list volume

4. Ensure that the drive layout is correct. To make changes to the drive layout, use the remove and assign commands, for example:

diskpart>select volume 1
diskpart>remove
diskpart>assign letter=C:

5. Once the drive layout is correct, exit diskpart:

diskpart>exit

6.From the CMD prompt, run the appropriate BMR/EFI script:

 

For Windows 2008+ and BIOS firmware

scripts\bcdedit_bmr_script.bat

For Windows 2008+ and EFI firmware

scripts\bcdedit_efi_script.bat

For systems earlier than Windows 2008

scripts\fixboot.bat 0 1

7. Reboot the system