Here is how to stop the new udev from accessing your striped dmraid drives

[James Olson]

The new version of the udev package in Fedora Core 4 updates is udev-071-0.FC4.2, and it tries to scan drive partitions to create
some new devices such as those in the new /dev/disk/by-id/ directory.
With dmraid you don't want it to scan your striped raid drives individually or it will generate errors as it tries to 
seek past the end of the drive with the "big" partition on it.  My raid
drives are /dev/hde, /dev/hdf, and /dev/hdg but you can modify it for
your own raid devices that you don't want udev to scan.

Here is the patch to the 50-udev.rules file in /etc/udev/rules.d/

# diff -Naur 50-udev.rules.orig 50-udev.rules
--- 50-udev.rules.orig  2006-01-31 08:09:15.000000000 -0800
+++ 50-udev.rules       2006-02-05 14:13:37.000000000 -0800
@@ -255,6 +255,9 @@
 # skip rules for inappropriate block devices
 KERNEL=="ram*|loop*|fd*|nbd*", GOTO="persistent_end"

+# skip dmraid drives
+KERNEL=="hde*|hdf*|hdg*", GOTO="persistent_end"
+
 # never access removable ide devices, the drivers are causing event loops on open()
 BUS=="ide", DRIVER!="ide-cdrom", SYSFS{removable}="1", GOTO="persistent_end"


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