BSOD: Unmountable Boot Volume on Win XP

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A friend of mine who has a PC with Windows XP installed on it had encountered a blue screen error code that appeared on the screen “ STOP 0x000000ED (0xaaaaaaaa,0xbbbbbbbb,0xcccccccc,0xdddddddd)UNMOUNTABLE_BOOT_VOLUME .“ According to him, this problematic event of his PC happened when he reloaded the fail-safe settings of the BIOS.

We researched on how we can get started to solve the issue. One of the websites that we have visited instructed us to perform check disk with instructions included on how to do it but miserably, it didn’t work. Please give me enlightenment on how the changed setting of the BIOS had affected to make this problem arise on my PC.

Thank you so much for your help.

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Best Answer by wasimakhtar2012
Answered By 0 points N/A #111655

BSOD: Unmountable Boot Volume on Win XP

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Hi Adilene.
 
The error message in your friend’s PC actually has a purpose. It prevents potential data loss due to incorrect settings in the bios.  It also  prevents access to the a hard drive when the file system is already corrupted.  The second scenario where the system file is corrupted, running CHKDSK/R to try and repair the system files is indeed the logical thing to do.  If chkdsk already failed that would leave us then with the first scenario: improper setting in the system BIOS.
 
You mentioned that this problem started when your friend reloaded the fail-safe settings in the BIOS.  This maybe due to a known issue with the UDMA hard disk controller and the hard drive wire connector installed in the system.    Basically,  if your current system set up does not support UDMA mode, you will get the STOP error message when you start Windows XP.
 
STOP 0x000000ED UNMOUNTABLE_BOOT_VOLUME followed by a strings of hexadecimal codes.
 
Loading the fail-safe settings might have forced the faster UDMA modes that are not currently applicable for your system.  My first advise would be to try loading optimal defaults in the bios. Go the BIOS and click or choose Load Optimal Defaults. If that does not do the trick, check the settings in the bios manually. The optimized defaults load the BIOS default settings while maintaining optimal performance.  This may actually revert the BIOS settings back to the original configuration prior to when your friend adjusted the settings in the BIOS.
 
Go to the BIOS -> integrated peripherals -> Onchip IDE Controller -> Master Driver Ultra DMA -> AUTO. Make sure that it is set to AUTO.  It would also be advisable to leave all the settings in AUTO.
 
If the UDMA mode is set to 2 or above, the required hard drive connector should be an 80-wire. You can check the difference by viewing this image:  
 
 
If you want to continue operating at higher UDMA modes, you have to make sure that the hard drive connector that you are using is correct.  This can easily be replaced, but when replacing make sure that you seat the connectors securely to avoid any other problem. If you cannot do this on your own, you can try contacting the PC manufacturer for assistance or consult the user guide if applicable.
 
If changing the settings in your BIOS does not correct the problem.   Try running CHKDSK/R again.
 
If this does not work, you might have to try updating windows xp to the latest service pack.  If no service pack has been downloaded or installed in your friend's PC, that could also be another possible fix.  Do this only if the above solutions did not correct the problem. As there is also a known issue with systems that lack windows XP service pack getting the same STOP error message.  If he had just reinstalled windows xp recently, try this one too.
 
Do not also forget to run a hard drive test to eliminate potential hardware problem.
 
Best Answer
Best Answer
Answered By 0 points N/A #111657

BSOD: Unmountable Boot Volume on Win XP

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Solution for 0x000000ed upgrade to XP stop error:

Advanced troubleshooting:

These methods are intended for advanced computer users. If you are not comfortable with advanced troubleshooting, you might want to ask someone for help, use the Microsoft Customer Support Services Web site to find other solutions, or contact Support. See the "Next steps" section for more information about the Microsoft Customer Support Services Web site.

Begin by reading the "Technical information about the error" section to understand why the error might be generated and the purpose of the message. Otherwise, you can skip this information and begin with "Method 1: Check the error message" to help you resolve the issue.

Technical information about the error:

This section provides some technical background about the cause of this error message and why it might be generated.

This behavior can occur if either of the following conditions is true:

1. Your computer uses an Ultra Direct Memory Access (UDMA) hard disk controller, and the following conditions are true:

  • You use a standard 40-wire connector cable to connect the UDMA drive to the controller instead of the required 80-wire, 40-pin cable.
  • The basic input/output system (BIOS) settings are configured to force the faster UDMA modes.


2. The file system is damaged and cannot be mounted.

The purpose of this error message is to prevent the following two things:

  • Potential data loss caused by using an incorrect IDE cable for the faster UDMA modes. An IDE cable is a kind of cable used to connect storage devices, such as hard disks, inside a computer.
  • Continued access to a drive on which the file system is damaged


Method 1: Repair the volume:

Note:  the second parameter (0xbbbbbbbb) in the error message. You might have to regenerate the error in order to write it down. If the second parameter (0xbbbbbbbb) of the Stop error is 0xC0000032, the cause of the error is that the file system is damaged. You can try to repair the volume to see whether this resolves the error. If the second parameter is not 0xC0000032, see ".

Method 2: Check the IDE cable and load Fail-Safe settings" for help.

Some things that you should know before you try this solution:

  • If the file system is damaged, you can use chkdsk /r command to repair the volume. However, if you use the chkdsk /r command, you may lose some data.
  • You will need the Windows startup disks or the Windows installation disk. If you do not have them, contact the computer manufacturer for help in obtaining the disks.
  • You will need the administrator password to complete the steps.


To repair the volume, follow these steps:

1. Start your computer by inserting the Windows startup disks or the Windows installation disk if your computer can start from the CD drive.

2. When the Welcome to Setup screen appears, press R to select the repair option.

3. If you have a dual-boot or multiple-boot computer, select the Windows installation that you want to access from the Recovery Console.

4. Type the administrator password when you are prompted to do this.

Note If no administrator password exists, press ENTER.

5. At the command prompt, on the drive where Windows is installed, type chkdsk /r, and then press ENTER.

6. At the command prompt, type exit, and then press ENTER to restart your computer.

7. After you repair the volume, check your hardware to isolate the cause of the file system damage.

If this procedure does not work, repeat it, but type fixboot instead of chkdsk /r in step 5.

If you are still unable to resolve the issue, please see the "Next steps" section for help.

Method 2: Check the IDE cable and load Fail-Safe settings:
 

  • If your computer uses a UDMA hard disk controller, try these steps. If your computer does not use a UDMA hard disk controller, see the "Next steps" section for help.
  • If your UDMA hard disk is connected to the controller with a 40-wire UDMA cable, replace the cable with an 80-wire cable.
  • In the BIOS settings for your computer, load the 'Fail-Safe' default settings, and then reactivate the most frequently used options, such as USB Support.


If you are not sure how to follow these steps, contact the manufacturer or refer to the user’s guide that was included with your hardware.

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