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Event ID: 482 Source: ESE98

<process> (<PID>) An attempt to write to the file "<file>" at offset <value> (<hex value>) for <value> (<hex value>) bytes failed with system error <error code> (<hex error code>): "<error message>". The write operation will fail with error <error code> (<hex error code>). If this error persists then the file may be damaged and may need to be restored from a previous backup.
In Exchange 2000, several errors cause ESE to dismount the databases in the storage group if a rollback cannot be performed and this event is logged. See ME812452 for details about this issue.

On a cluster server, neither MAPI nor non-MAPI clients can connect to the mailbox store. The Application event log is full of event ID 482 and event ID 1159 errors. Both of these events indicate that the information store cannot access the database. These events are logged for all storage groups. See ME322126 for information about this situation.
This problem can be caused by low disk space on the Exchange Information Store Drive. Free-up disk space and then restart the Exchange System Attendant to resolve the issue. See ME555423 for more details.
The file stated in the event is probably damaged. You can try to repair it by running the following commands:
“esentutl /p "<path to file>\<file>",


“esentutl /d "<path to file>\<file>".
As per Microsoft: "This issue may occur if you are using a FAT32 partition, and the Exchange database file is approaching four gigabytes (GB)". See ME328679 and MSEX2K3DB for more details.
This issue may occur if hackers use your Exchange Server to relay unsolicited e-mail messages (spam). As a result, the Badmail folder fills up with messages that your server cannot handle. The messages cannot be sent back, because the return addresses are not valid (spoofed). See ME321825 for more details.

This event can also show up on a Microsoft SharePoint Portal Server and can occur if the Microsoft Exchange Information Store (MSExchangeIS) service has quit because the server has run out of disk space. The Sharepoint Portal Server (Msdmserv) service depends on MSExchangeIS to start; if MSExchangeIS is not running, Msdmserv cannot restart. See ME296679 for more details.

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