PROBLEM:
Customer is receiving the following error on boot:
UNMOUNTABLE_BOOT_VOLUME and a stop error code of 0x000000ED
DISCUSSION:
For older technicians, familiar with Windows NT, 2000 and XP
(Gold edition) this error code is more familiar. The partition on the HDD
is not readable and the system cannot boot. On system prior to XP SP1,
this error was fairly frequent and was generally resolved by running CHKDSK /R
from recovery console. The release of XP SP1, 2000 SP4 and NT SP6
generally stopped the software cause of these errors and they dropped from the
daily items techs see frequently.
I’ve noticed, that is the past 6 months or so, there has
been an increase in this error message coming up in issues I deal with
daily. In almost all cases, the resolve has been a HDD replacement.
In the troubleshooting of this issue, diagnostics generally will not fail on
this error without a surface test (Extended 32 bit HDD diagnostics). The
few resolves I’ve seen without a dispatch required the NON-DOS Debug Script to
be run to remove all partitions from the drive.
RESOLUTION:
1. On systems displaying 0x000000ED, run PSA, 32 Bit
Quick and 32 Bit Full Diagnostics on the HDD (Stopping any time you get a code
requiring HDD replacement).
2. Attempt a CHKDSK /R from recovery console (I’ve
never seen this work on XP SP1 or higher, but it might)
3. If the drive passes diagnostics (Remember, passing
diagnostics does not ensure the hardware is good, just not error found) run the
following DEBUG Script:
Aside from the reference to downloading CDENAB.EXE in that
article, DEBUG.EXE can also be found in the X:\CSD\TOOLS\WIN98 folder of many
resource CDs.
4. If all of the above fails, then replace the hard
drive.
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