Exchange 的information storage 会dismount当每日例行检查数据库大小超过制定的警告值的时候。
在日志中会有如下
Event Type: Error
Event Source: MSExchangeIS Mailbox Store
Event Category: General
Event ID: 9690
Date: 05.08.2008
Time: 05:00:34
User: N/A
Computer: CXCHINA02
Description:
Exchange store 'First Administrative Group\Mailbox Store (CXCHINA02)': The logical size of this database (the logical size equals the physical size of the .edb file and the .stm file minus the logical free space in each) is 18 GB. This database size has exceeded the size limit of 18 GB.
This database will be dismounted immediately.
For more information, click http://www.microsoft.com/contentredirect.asp.
解决办法：
修改注册表相关值：见Database Size Limit Configuration and Management
然后重新启动Information storage服务