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why is Event 7 hard disk bad block always on "D", and never C, E, or other drive letter?

I've been struggling with a bunch of Windows XP Event 7 errors:  "The device, \Device\Harddisk1\D, has a bad block".  I assumed at first that the "D" referred to logical drive D, which sent me down a dark alley trying to fix the wrong hard disk.  I eventually figured out that my logical disk "D" was on harddisk0, and was working perfectly well.  The faulty "harddisk1" contained only logical drive "F".  So the "D" definitely does not refer to the logical drive with the problem.   Anyone know what it does signify?  
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yessirnosir
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yessirnosir
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2 Solutions
 
Irwin SantosComputer Integration SpecialistCommented:
bad sector on drives...

Here...run this...

chkdsk /r
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yessirnosirAuthor Commented:
thanks irwinpks, you're right about the bad sectors, but that wasn't my question.  My question is why does the error message say "D" when the bad sectors are on drive "F".  In fact, when I googled "\device\harddisk1\D" I got hundreds of hits, many that said something like "you have bad sectors on drive D", but if you change the "D" to a "C" or "E" you get zero hits, so clearly the "D" can't be a drive letter -- but what does it mean?
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Irwin SantosComputer Integration SpecialistCommented:
how are your drives laid out physically and logically in disk management?

also, do you have CD/DVD burning software that creates a virtual drive?
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yessirnosirAuthor Commented:
irwinpks, I don't have a virtual CD drive.  I replicated the error message in several different configurations on two different computers.  No matter whether the problem drive was on the primary or secondary channel, master or slave, with the logical drive configured as C: D: F: or Z:, the error message was always that "\device\harddiskX\D" has a bad block.  
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Irwin SantosComputer Integration SpecialistCommented:
hmmm..."undocumented feature" comes to mine ;-)
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Irwin SantosComputer Integration SpecialistCommented:
never seen that happen before...and could be some related registry entry gone awry between your OS and sofware apps.

perhaps run chkdsk /r will at least get rid of the error message
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yessirnosirAuthor Commented:
The bad hard disk has been replaced.  Seagate disc diagnostics confirmed my "F" drive was bad, and Seagate replaced the drive under warranty.
But I posted the question because I'm still burning about my wasted time doing an emergency backup of 300 GB of data from the WRONG hard drive because I misunderstood the meaning of that "D".   Clearly if the "D" was supposed to be the logical drive, there would be some people out there getting "\device\harddisk1\C" errors occasionally, but Google comes up empty on that search string, so apparently no one ever gets that error.   "D" must have a different meaning.
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Irwin SantosComputer Integration SpecialistCommented:
""D" must have a different meaning."
or in this case...."Damnit, I wasted my time!"

:-(

I've built over 5000+ computers, and services 10x that while in business, and never experienced that before...maybe blind luck..but consider the variables out there with the OS and 1000's of possible instances that can make this go wrong.  But I'll stand by my previous "undocument feature" response ;-)

Thank Mr. Gates for it.
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garycaseCommented:
The error message you got occurs all-too-frequently -- I found several discussion forums on this problem, but nothing that really illuminates it further.   But the "D" definitely does not refer to any logical drive.   The Disk # displayed is apparently correct; so the safest thing to do is look in Disk Managment and see which disk is #1.   According to Microsoft, there "may" be an exclamation point in a yellow circle displayed on the drive with the error.

This kb article discusses the problem a bit:  http://support.microsoft.com/default.aspx/kb/885464
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yessirnosirAuthor Commented:
I just ran dmdiag (on a different computer), and part of the output is shown below:

---------- \Device\Harddisk1 ----------

\Device\Harddisk1\DP(1)0x7e00-0xf3a8e400+6 (Device)
\Device\Harddisk1\DP(2)0xf3a9e000-0x1afec5a200+7 (Device)
\Device\Harddisk1\DR1            (Device)
\Device\Harddisk1\Partition0     (SymbolicLink) -> \Device\Harddisk1\DR1
\Device\Harddisk1\Partition1     (SymbolicLink) -> \Device\HarddiskVolume5
\Device\Harddisk1\Partition2     (SymbolicLink) -> \Device\HarddiskVolume6

Could it be that the "D" in the Event Error message just means "device"?
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garycaseCommented:
It's possible, but I really don't know.  Neither the kb article, nor any of the articles I found in forums discussing this problem expand on the meaning.   But it could simply be an indication that it's a device error (and thus not a logical partitioning error).   It could also indicated an error in the deferred write operation (the kb article notes that sometimes you'll get a popup about that).
... simple fact is I don't know what the "D" stands for -- and Microsoft's not very forthcoming on what it means either !!
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yessirnosirAuthor Commented:
thanks for your input irwinpks and garycase.   Looks like there isn't a known answer to this question, but I appreciate your efforts and have split points and closed the question.  Maybe the thread will save someone else from having the same misunderstanding that I did.
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garycaseCommented:
You're most welcome.
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Irwin SantosComputer Integration SpecialistCommented:
cool. thank yoU!
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