Hi! I have the same problem Gu Lei!
My testserver suddenly started to behave like this. I restart the server and then I log on to dbmcli and run db_register, param_checkall and then db_warm. Then all of a sudden, just after db_warm has finished, the database crashes, without any warning and there is nothing in the log files that indicates what the problem might be! The database is MaxDB 7.5.00.21 and on top of it runs a SAP system. It is installed on an Windows 2003 server and the log and datadevs are on different discs. I got the same error once before and that was when I tried to restore a backup, but since then the system has been reinstalled. rollo
