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Unmountable _boot_volume

Last response: in Windows XP
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December 16, 2011 11:33:49 PM

Need some help. I had a power outage while I was on the computer. When the power came back on and I tried to restart it I got the blue screen with the message Unmountable_boot_volume ................
Stop: 0x000000ed (0x8as737e30, 0xc0000006, 0x0000000, 0x00000000
I tried restarting in the safe mode, but it just came back with the same message.
Can anyone explain what happened?

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December 17, 2011 3:59:22 AM
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The power outage may have damaged HD Disk sectors or caused file system corruption, or could have caused RAM memory damage.
1. You can repair HD sectors with chkdsk /r from the Recovery Console (you’ll need the Win XP installation CD) and if that doesn’t help,
2. Reset the BIOS to default parameters, if no success reset the BIOS removing the cell battery from the motherboard for 5-10 minutes.
3. If that doesn’t help, check the RAM modules with Memtest86 or Microsoft Memory Diagnostic. Memtest is more complicated so you may want to try Microsoft Memory Diagnostic first.. check the Computing.net thread for info on how to read either ram test application.

http://www.memtest86.com/download.html
http://oca.microsoft.com/en/windiag.asp

How to read Memtest?
http://www.computing.net/answers/hardware/how-to-read-m...

Unmountable_Boot_Volume in WIN XP Pro
http://www.tek-tips.com/viewthread.cfm?qid=436409

How to use the Recovery Console to make repairs to Windows XP
http://forums.whatthetech.com/index.php?showtopic=95574
December 17, 2011 10:50:01 AM

I got into the Symptom Tree, ran Cannot Boot the OS and got 2 error messages:
Error code 0F00:0244 Msg block 85773064: Uncorrectable data error or media is write protected.
Error code 0F00:1A44 Msg block 85773064: Uncorrectable data error or media is write protected.
I tried using Recovery Console, but got this message:
SPCMDCON.SYS file needed for Recovery Console is missing. Recovery Console cannot proceed.

Also, I noticed just before the power outage that my McAfee icon on the desk top had changed from its usual red shield to something resembling a note pad. Couls a virus had done this damage?
Related resources
Anonymous
December 17, 2011 11:05:27 AM

Boot from a Windows XP CD, get into the Recovery Console and run chkdsk c: /p /r until there are no errors.
December 17, 2011 11:22:18 AM

Quote:
Boot from a Windows XP CD, get into the Recovery Console and run chkdsk c: /p /r until there are no errors.

Tried geting into Recovery Console, but got a message
SPCMDCON.SYS file needed for Recovery Console is missing. Recovery Console cannot proceed.

Anonymous
December 17, 2011 1:03:11 PM

Are you booting from a legitimate Windows XP CD?
December 17, 2011 1:12:00 PM

Quote:
Are you booting from a legitimate Windows XP CD?

Yes the one that came with my computer, which is a Dell Dimension 4550. This is the first time that I have used it, so it is just out of its package.
December 17, 2011 6:21:58 PM

All information I've found seems to indicate a possibly bad hard drive, ram memory or more likely a virus. SPCMDCON.SYS is apparently not a Windows file and has been identified as a virus but any Windows file can be infected or replaced by viruses... So a virus scan will confirm or clear that possibility.

As a note, this problem can happen on a new computer; read the last reply on this thread...
http://en.community.dell.com/support-forums/disk-drives...
The last reply mentions a new computer stored in the box for years and when it's turned on it comes up with the "Uncorrectable data error or media is write protected"...

What can cause this problem on a new unused Dell Dimension 2400 computer that's been stored for no less than 5 years?... the only thing that comes to mind is the BIOS battery... possibly the BIOS itself got corrupted.. other than that, what can afflict a computer in such situation? the antivirus is long outdated... the system (WXP SP2 at best) would be vulnerable from the first moment it's turned on if it was connected to the Internet.

The first thing I would do is, scan the hard drive from a host computer or a Live CD... and if that doesn't solve the problem, I would reset the BIOS if you haven't done that yet, replace the BIOS battery if it's reasonably aged, and consider a BIOS update. I would suspect the Power Supply as it would be the first component to take the spikes of a power outage... a weak PSU can cause hard drive problems; I have experienced related problems with messages saying something like: OS not found, no media detected, unmountable boot drive, etc. The HD was a little old and ailing but it kept working, but the PSU was already on the blink... So what you need to do is as follows (in no particular order):

1. Scan the hard drive for virus, from a host computer or Live CD (Antivirus Live Cd) http://www.avg.com/us-en/avg-rescue-cd
2. check the RAM with Memtest or Microsoft Memory Diagnostic
3. test or replace the PSU
4. Reset BIOS to defaults, reset it removing the battery 5-10min, update it.
December 18, 2011 12:50:12 AM

Chicano said:
All information I've found seems to indicate a possibly bad hard drive, ram memory or more likely a virus. SPCMDCON.SYS is apparently not a Windows file and has been identified as a virus but any Windows file can be infected or replaced by viruses... So a virus scan will confirm or clear that possibility.

As a note, this problem can happen on a new computer; read the last reply on this thread...
http://en.community.dell.com/support-forums/disk-drives...
The last reply mentions a new computer stored in the box for years and when it's turned on it comes up with the "Uncorrectable data error or media is write protected"...

What can cause this problem on a new unused Dell Dimension 2400 computer that's been stored for no less than 5 years?... the only thing that comes to mind is the BIOS battery... possibly the BIOS itself got corrupted.. other than that, what can afflict a computer in such situation? the antivirus is long outdated... the system (WXP SP2 at best) would be vulnerable from the first moment it's turned on if it was connected to the Internet.

The first thing I would do is, scan the hard drive from a host computer or a Live CD... and if that doesn't solve the problem, I would reset the BIOS if you haven't done that yet, replace the BIOS battery if it's reasonably aged, and consider a BIOS update. I would suspect the Power Supply as it would be the first component to take the spikes of a power outage... a weak PSU can cause hard drive problems; I have experienced related problems with messages saying something like: OS not found, no media detected, unmountable boot drive, etc. The HD was a little old and ailing but it kept working, but the PSU was already on the blink... So what you need to do is as follows (in no particular order):

1. Scan the hard drive for virus, from a host computer or Live CD (Antivirus Live Cd) http://www.royal-downs.com/software/448-antivirus-livec...
2. check the RAM with Memtest or Microsoft Memory Diagnostic
3. test or replace the PSU
4. Reset BIOS to defaults, reset it removing the battery 5-10min, update it.



I finally got my Recovery CD to work. I Ran checkdisc as you suggested, 4 times, 3 times to clear error and the fourth time it should all was ok. I started up in safe mode and ran a complee virus scan. It found no threats. I assume that that the power outage must have corrupted some files. Up and running with no lost data. Thanks for you help.
December 18, 2011 12:50:45 AM

Best answer selected by dampat.
December 18, 2011 1:10:01 AM

dampat said:
I finally got my Recovery CD to work. I Ran checkdisc as you suggested, 4 times, 3 times to clear error and the fourth time it should all was ok. I started up in safe mode and ran a complee virus scan. It found no threats. I assume that that the power outage must have corrupted some files. Up and running with no lost data. Thanks for you help.


Right.. sectors most likely. Glad you got it running.. and thanks for the best answer vote
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