NetIQ AppManager 7.0.x
In the operator console select the agent with the object that you cannot discover and press ALT+F8.
In the window that appears there will be text that states objid=x This is the object ID of the system.
Open SQL query analyzer, connect to the Repository server and select the AppManager database.
Run this query:
SELECT objid FROM Object WHERE RootMachineObjID = <the object ID of the system> and TypeID =43 and Status != 0
This will give you the object ID of the drive object you want to change.
Next run this query:
UPDATE object set status = 0 where Objid = <the number you got back from the previous query>
After this you should be able to rediscover the drive object by dropping the appropriate Discovery knowledge script (Discovery_NT, Discovery_CIM, etc).
CAUTION: This SQL Query directly accesses your database and updates/deletes data. If the query is performed incorrectly it can cause irreparable harm to the database and may result in loss of data. If you are unfamiliar with SQL or how to run a SQL Query please contact NetIQ Technical Support directly.