Re: Upper Lower Filters in XP Registry

From: Neal Lavon (nlavon_at_comcast.net)
Date: 02/27/05 

Date: Sun, 27 Feb 2005 14:20:19 -0500

Grrr.

Jim, I just changed not only my configuration but used two CD-ROM
drives with nothing, although there was some progress. I did re-cable
the CD-ROM as a slave using the top IDE connector of a new ribbon
cable. The DVD-ROM drive is now below it in the computer case. When I
first booted up with the Liteon, nothing.

I replaced the Liteon with another ATAPI CD-ROM I have and when that
booted up, I noticed that the little icon for a spinning CD appeared
briefly by the mouse and seemed to "want" to load but in the end, did
not. I still got the same error message in Event Viewer.

For what it's worth, here's the data in the box below the error
message:

0000: 03 04 68 00 01 00 b8 00 ..h...¸.
0008: 00 00 00 00 0b 00 04 c0 .......À
0010: 01 01 00 00 85 01 00 c0 ....?..À
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 80 00 00 00 00 00 00 .?......
0028: 3f 69 00 00 00 00 00 00 ?i......
0030: ff ff ff ff 00 00 00 00 ÿÿÿÿ....
0038: 40 00 00 c4 02 00 01 00 @..Ä....
0040: ff 20 0a 12 4c 02 00 00 ÿ ..L...
0048: 00 08 00 00 0a 00 00 00 ........
0050: 00 00 c7 85 90 eb b4 86 ..Ç? [square box] ë´?
0058: 00 00 00 00 f8 8b ef 86 ....ø?ï?
0060: 00 60 f7 86 10 00 00 00 .`÷?....
0068: 28 00 00 00 00 10 00 00 (.......
0070: 01 00 00 00 00 00 00 00 ........
0078: 70 00 04 00 00 00 00 0a p.......
0080: 00 00 00 00 08 00 00 00 ........
0088: 00 00 00 00 00 00 00 00 ........

Also on Driver File Details in Device Driver:

C:\\WINDOWS\system32\drivers\Cdr4_xp.sys
C:\\WINDOWS\system32\driversCdral2k.sys
C:\\WINDOWS\system32\drivers\cdrom.sys
C:\\WINDOWS\system32\drivers\imapi.sys
C:\\WINDOWS\system32\drivers\pwd_2k.sys
C:\\WINDOWS\system32\drivers\redbook.sys
C:\\WINDOWS\system32\drivers\strorprop.dll

In the Registry Key, 4D36E965-E325-11CE...
LowerFilters is REG_MULTI_SZ Cdr4_xp
UpperFilters REG_MULTI_SZ Cdralw2k pwd_2k
LowerFilters.Bak REG_MULTI_SZ PxHelp20 PFC
UpperFilters.Bak REG_MULTI_SZ InCDPass GEARAspiWDM

There is no trace of Nero software (Ahead Company) (InCD left) in
Add/Remove Programs. So I'm really stumped and frustrated.

Questions:

a) someone in a thread here said that the PxHelp20 PFC file is
corrupted. I have seen that it's a Trojan Virus and keeps CD-ROMs from
working properly. It is in the Drivers file. How does one "disable"
it? Just remove it from the Drivers File?

b) delete in the Registry the Upper and Lower Filters.Bak files? Run
cdgone.reg again?

I think I'm nearing a possible solution here. Thanks!

Neal Lavon
Takoma Park, MD
USA
On Fri, 25 Feb 2005 22:35:32 -0800, "Jim Byrd"
<jrbyrd@spamlessadelphia.net> wrote:

>Hi Neal - If you've wired and jumpered as you say, then you may well have a
>conflict. I'd just switch the middle and end connectors (moving the drives
>if needed for convenience) if your documentation recommends that the one you
>currently have jumpered as Slave should be that way - some drives cannot
>support being a master. For right now see if that fixes things for you.
>[Later you might want to do some reading on the net about alternative
>configurations such as having each HD be master and each CD/DVD drive be
>slave. Do a Google on this for more info - it's thought by some experts to
>have some advantages. Let's see if re-connecting the drives cleans things
>up first though. Then you can look at things like that and doing such
>things as enabling DMA for your CD/DVD drives (which is a whole other thing
>:) ) ] Please let us know what happens.

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