Source:  FILESYS.NLM

Explanation:  This is an internal consistency check done by decompression to guarantee the integrity of the data being decompressed. The file that was being decompressed will remain compressed, and the system will try again later to decompress it.

Action:  No immediate action is necessary. Note the volume number and watch for more of these same alerts. Also, watch for other errors indicating that the memory or disk is failing. If these alerts or other data corruption problems happen often on a particular volume, the disk or hardware supporting the disk should be repaired or replaced.