hald stat shows Ds

[Kudret Güler <kudrettin@gmail.com>]

hello, after a short while after booting, hald shows Ds status in ps. 

Trying to start gnome-volume-properties I get the error:
libhal.c 767 : org.freedesktop.DBus.Error.NoReply raised
"Message did not receive a reply"

I also observe:
kernel: hdd: request sense failure: status=0x51 { DriveReady
SeekComplete Error }
kernel: hdd: request sense failure: error=0x04Aborted Command 

hdd is dvd-rom and didn't have this error or any other single problem
before using udev.

What can be the problem?

regards