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Server 2008 R2 BSOD c000021a Fatal System Error

Posted on 2013-06-07
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Last Modified: 2016-11-23
Cannot get a Dell Power Edge T110 to boot after a single disc failed in a RAID 1 Config on Perc S100 Controller. Disk replaced and rebuild in RAID.

I've spent hours online reading, done the following:
Memtests and Disk Hardware Tests
Tried to Boot in Safemode, loads to storport.sys and then reboots
From the command prompt Run CHKDSK C: /F
Run SFC /SCANNOW /OFFBOOTDIR=C:\  /OFFWINDIR=C:\WINDOWS
boot using Last Known Good Configuration
bootrec /RebuildBcd
bootrec /FixMbr
bootrec /FixBoot
renamed c::\boot\bcd bcd.old
Recovered Registry from Regback in c:\Windows\System32\config\regback
I have marked the partition as Active in DiskPart
Disabled Driver Signature Enforcement in Advance Boot Options

The BSOD is get says the following:

STOP: c000021a {Fatal SyStem Error}
The verification of a knownDLL failed. system process terminated unexpectedly with a status of 0xc000012f (0x00086e00 0x000000000)
The system has been shut down.
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Question by:sjordaan
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Expert Comment

by:tmoore1962
ID: 39229744
Sounds like the controller for the hard drive driver is corrupt. get driver files and use a hirens disk to get to a prompt where you can copy the drivers to the server's hdd.  If you don't have a good backup of the drive I would clone the driver before attempting any repairs.
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Author Comment

by:sjordaan
ID: 39229807
Thank you I have started the download of the Hirens disk. Just want to confirm, I should copy the controller drivers (bcraid.sys) files to the c:\windows\system32\drivers folder.

I'll clone the drive before attempting this.
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Expert Comment

by:Pradeep Dubey
ID: 39230012
could you please do this once :
Load system registry once again and remove all entry from the below key except default one  
HKEY_LOCAL_MACHINE\TEST\ControlSet001\MountedDevices

faulty system registry key is loaded as test

Also check for the automount key from the below location
HKEY_LOCAL_MACHINE\Test\ControlSet001\Services\mountmgr

It should not be in disabled state


after that boot the system.


take backup of registry :-)
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LVL 11

Expert Comment

by:Pradeep Dubey
ID: 39230056
Also let me know if memorydump is generated for this.
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Author Comment

by:sjordaan
ID: 39230227
Sorry, no memorydump has been generated
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Author Comment

by:sjordaan
ID: 39230237
HKEY_LOCAL_MACHINE\TEST\ControlSet001\MountedDevices
HKEY_LOCAL_MACHINE\Test\ControlSet001\Services\mountmgr

Both of the above keys don't exist. Sorry no Key called Test is visible
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Expert Comment

by:Pradeep Dubey
ID: 39230413
how you have accessed registry ?
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Author Comment

by:sjordaan
ID: 39230489
Booted from Windows Server 2008 R2 DVD
System Recovery Options
Recovery Tool
Command Prompt
regedit
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LVL 11

Expert Comment

by:Pradeep Dubey
ID: 39231442
Okay, after that you have to load the faulty machine system registry and when it asked to provide name you have to give any name I given test and that was the test indicated.

well providing you a screenshot for the same.
registry-mount.docx
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Accepted Solution

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sjordaan earned 0 total points
ID: 39309524
After 20 hours of troubleshooting with Microsoft SBS Division, the only solution was to reload from scratch. Thank you all for your assistance
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Author Closing Comment

by:sjordaan
ID: 39323066
Business Critical and we had to get the server running, Reload was our only option
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