Information Store (6768) XXX: Log sequence numbers for this instance have almost been completely consumed. The current log generation is 933000 (0x000E3C88) which is approaching the maximum log generation of 1048559 (0x000FFFEF), there are 115559 (0x0001C367) log generations.
So the maximum log generation is 1048559 (0x000FFFEF) and remains 115559 logs to consume, so ig we find on the APP eventvwr the event number 214, we can estimate how many logs our Exchange use by day and we can estimate how many days we have until to have this problem.
Exchange 2007 supports 2 billion log files (2147483628) which is 7fffffec in hexadecimal.
Notice that if you miss the ESE 514 warning your databases will dismount and generate the following events:
Event ID: 1159
Event Type: Error
Event Source: MSExchangeIS
Event Category: General
Description: Database error 0xfffffdf9 occurred in function JTAB_BASE::EcEscrowUpdate while accessing the database "First Storage Group\Mailbox Store (SERVER)".
Event ID: 9518
Event Type: Error
Event Source: MSExchangeIS
Event Category: General
Description: Error 0xfffffddc starting Storage Group Path_of_Storage_Group on the Microsoft Exchange Information Store. Storage Group - Initialization of Jet failed.
http://support.microsoft.com/kb/830408
Solution:
One of the common solution is dismount all database that are part of storage group, move out all logs and CHK file, mount all databases, CHK file and transaction logs will create starting in 0.
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After that, all incremental backup are unusable, so run a full backup after this procedure.
Muy buena info! Gracias GURU!
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