I see.
Applying below patch solved these error messages on my CentOS 5.5 environment.
Thank you.
--- /etc/udev/rules.d/05-udev-early.rules
+++ /etc/udev/rules.d/05-udev-early.rules
@@ -1,7 +1,7 @@
# sysfs is populated after the event is sent
ACTION=="add", DEVPATH=="/devices/*", ENV{PHYSDEVBUS}=="?*", WAIT_FOR_SYSFS="bus"
ACTION=="add", SUBSYSTEM=="net", WAIT_FOR_SYSFS="address"
-ACTION=="add", SUBSYSTEM=="scsi", WAIT_FOR_SYSFS="ioerr_cnt"
+ACTION=="add", SUBSYSTEM=="scsi", KERNEL=="[0-9]*:[0-9]*", WAIT_FOR_SYSFS="ioerr_cnt"
# ignore these events until someone needs them
SUBSYSTEM=="drivers", OPTIONS="ignore_device"
--