the event ids are listed below and MS Support was involved but no sure solution becasue the exact cause is unknown, any help is greatly appreciated: Event Type: Error Event Source: ESE Event Category: General Event ID: 488 Date: 6/30/2010 Time: 10:28:18 AM User: N/A Computer: SDMS196 Description: Information Store (976) SG1: An attempt to create the file "F:\Exchsrvr\SG1\Logs\E00tmp.log" failed with system error 80 (0x00000050): "The file exists. ". The create file operation will fail with error -1022 (0xfffffc02). For more information, click http://www.microsoft.com/contentredirect.asp. Event Type: Error Event Source: ESE Event Category: Logging/Recovery Event ID: 413 Date: 6/30/2010 Time: 10:32:23 AM User: N/A Computer: SDMS196 Description: Information Store (976) SG1: Unable to create a new logfile because the database cannot write to the log drive. The drive may be read-only, out of disk space, misconfigured, or corrupted. Error -1022. For more information, click http://www.microsoft.com/contentredirect.asp. Event Type: Error Event Source: ESE Event Category: Logging/Recovery Event ID: 492 Date: 6/30/2010 Time: 10:32:23 AM User: N/A Computer: SDMS196 Description: Information Store (976) SG1: The logfile sequence in "F:\Exchsrvr\SG1\Logs\" has been halted due to a fatal error. No further updates are possible for the databases that use this logfile sequence. Please correct the problem and restart or restore from backup. For more information, click http://www.microsoft.com/contentredirect.asp. Event Type: Error Event Source: ESE Event Category: Logging/Recovery Event ID: 471 Date: 6/30/2010 Time: 10:32:23 AM User: N/A Computer: SDMS196 Description: Information Store (976) SG1: Unable to rollback operation #12465797 on database F:\Exchsrvr\SG1\DB1.edb. Error: -510. All future database updates will be rejected. For more information, click http://www.microsoft.com/contentredirect.asp. Event Type: Error Event Source: ESE Event Category: General Event ID: 104 Date: 6/30/2010 Time: 10:32:40 AM User: N/A Computer: SDMS196 Description: Information Store (976) SG1: The database engine stopped the instance (0) with error (-1090). For more information, click http://www.microsoft.com/contentredirect.asp.

Are you out of disk space?Mark Morowczynski|MCT| MCSE 2003:Messaging, Security|MCITP:EMA 2K7,EDA Win 7,ES,SA,EA|MCTS:Windows Mobile Admin|Security+|http://almostdailytech.com