How to debug eDirectory Coring Issue?

Below are some points to ponder to debug Novell eDirectory Coring Issues.

1) Is there any disk space issue. As per my observation when disk space reaches 95% eDirectory cores.

2) This happens on all servers or just one? If only one, is the server running the drivers?

3) How many drivers do you have running on that server? If the server is running many drivers and do you have any load issues.

4) What patches have been installed for eDirectory software and IDM (engine and drivers)?

5) Since when this has been happening?

6) Did you tune eDirectory for the load is going to receive? What start up config set up does eDirectory have? (pre_ndsd_start and _ndsdb.ini)

7) Does the server have enough disk space?

8) What are the specs of the server (hardware)?

9) What is the server doing when it abends?

10) Are you syncing passwords?