| Event Id | 505 |
| Source | ESE |
| Description | Information Store (2028) An attempt to open the compressed file "drive:\Exchsrvr\MDBDATA\priv1.edb" for read / write access failed because it could not be converted to a normal file. The open file operation will fail with error -4005 (0xfffff05b). To prevent this error in the future you can manually decompress the file and change the compression state of the containing folder to uncompressed. Writing to this file when it is compressed is not supported. |
| Event Information | According to Microsoft: CAUSE: This issue may occur when you apply Exchange 2000 Server Service Pack 3 to an Exchange 2000 server that contains an information store database that is compressed by using NTFS file system compression. This issue may also occur when you upgrade an Exchange 2000 Server computer to Exchange Server 2003. Exchange 2000 Server Service Pack 3 and Exchange 2003 prevent compressed information store databases from mounting. Files that are managed by extensible storage engine (ESENT or ESE) are not designed to be stored on a compressed drive. The extensible storage engine depends on sector independence for log-based recovery, and compression of files invalidates sector independence. Compression should not be turned on for volumes hosting ESE databases, or any database that uses write-ahead logging. Before Exchange 2000 Server Service Pack 3, compressed information store databases were allowed to mount. However, corruption can result in any Exchange 2000 information store databases or information store logs that have been compressed by using NTFS compression. With Exchange 2000 Server Service Pack 3 and later, compressed information store database files of 128 megabytes (MB) or fewer are automatically decompressed. When database files grow to larger than 128 MB, the database does not mount and the error messages are generated in the Application Log. Exchange 2000 Server Service Pack 3 and Exchange Server 2003 prevent compressed databases larger than 128 MB from mounting. Because the public information store database may be smaller than 128 MB, it may mount. However, apply all the steps in the "Resolution" section of this article to all Exchange 2000 Server or Exchange Server 2003 information store databases that are in a compressed folder, regardless of whether they can be mounted or not. RESOLUTION: To resolve this issue, you must decompress the folders where the information store databases and logs reside, d |
| Reference Links | Database does not mount, and you receive error 0xfffff05b after you apply SP3 to Exchange 2000 |
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