udev rule partially activated after reboot

Issue

• We have an udev-rule to add raw-devices. After a reboot the raw devices are all added but for some of them the 'chown'-command defined in RUN+-statement in the udev-rule is not executed.

The udev-rule:

KERNEL=="dm-*", ENV{DM_UUID}=="part1-mpath-20017380065310fae", RUN+="/bin/raw /dev/raw/raw1 %N", RUN+="/bin/chown sybase:sybase /dev/raw/raw1", RUN+="/bin/ln -sf /dev/raw/raw15 /dest_dir"

No error-messages in boot.log or in the messages-file. The only thing i find in boot.log:

./boot.log.1:Starting udev:                                [  OK  ]
./boot.log.1:Retrigger failed udev events                  [  OK  ]

It does not occur on every server (4 servers are adding the same raw-devices and on some of them no problem is occurring- and not always (after each reboot the result can be different).