without ssh access it is hard to be sure but I assume it is generating thumbnails and indexing all the photos. since you can access the public share it is still running.
if you would be comfortable with using SSH you could reboot and imediatly enable ssh then try the step here to disable this. the main issue here is catching it between the disk scan from the crash and the photo issue starting.
if possiable I would let it run, possiably even several days to finish. depending on the volume of photos you add it may or may not be an issue in the future
if comfortable using ssh and using a Linux system you could do these steps to lower the priority of these processes which is what I have now
I strongly suggest a backup of any file before changing it. this requires SSH access and putty or similier. proceed at your on risk. easy change if you ever used Linux / Unix
edit /etc/init.d/wdphotodbmergerd and /etc//init.d/wdmcserverd they had renice 0 -p $$, change it to renice 15 -p $$
if previously disabled do these 4 commands
update-rc.d wdphotodbmergerd enable
update-rc.d wdmcserverd enable
If not disabled do these 4