Unable to start the Microsoft Exchange Information Store. Disk is full.

Details
Product: Exchange
Event ID: 1004
Source: MSExchangeIS Public Store
Version: 6.0
Component: Information Store
Symbolic Name: msgidFailedStartFull
Message: Unable to start the Microsoft Exchange Information Store. Disk is full.
   
Explanation
An administrator can observe disk space usage on the drive containing the Information Store by using System Monitor and Performance Logs and Alerts.The LogicalDisk object, along with the % Free Space and Free Megabytes counters, monitor and trigger alerts when disk space is low. Increasing log files can cause the directory or information store to run out of operating space.
   
User Action
Do one of the following:Write the log files to a different drive. Change the location where the directory or information store transaction logs are written.Back up the Exchange server. Use the Windows Backup utility bundled with Microsoft Exchange Server to perform either a normal (full) or incremental online backup of the server. The Backup utility automatically deletes transaction logs that are no longer needed because they are committed to disk. If you never run the Backup utility, log files continue to grow. Correctly delete log files periodically. When the directory and information stores run, you find log files of the Edb*.log form in both the Exchsrvr\Dsadata and Exchsrvr\Mdbdata directories. Microsoft Exchange Server uses these log files to commit data to disk. Also, these log files are necessary to perform incremental and differential backups using the Windows Backup utility. The Edb*.log files can be deleted after the directory and information store services have been shut down. If the log files are deleted when the services are still running, you can jeopardize data integrity. When the services are stopped, the transactions in these log files are committed to the main database file on disk (Dir.edb for the directory, and Priv.edb and Pub.edb for the information store). When this data is committed, the log files are no longer needed. Follow the steps below to correctly delete log files: 1.Stop all Microsoft Exchange Server services.2. Make a backup copy of the Edb*.log files in both the Exchsrvr\Dsadata and the Exchsrvr\Mdbdata directories. Copy them to an alternate location on the hard drive or to the tape backup.3. Delete all the Edb*.log files in both the Exchsrvr\Dsadata and Exchsrvr\Mdbdata directories.4. Restart all the Microsoft Exchange Server services (in particular, the directory and information store services).5. If these services do not start, restore the Dsadata and Mdbdata subdirectories from tape or hard disk. Restart the services again.6. If the services start, delete the backup copy of the Dsadata and Mdbdata subdirectories.If you delete the Edb*.log files in the manner described above, incremental and differential backups of the directory and information stores are no longer valid or possible. You can only perform a normal type (full) backup.

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