An asynchronous I/O error occurred when the SQL Server Extractor tried to read data from a virtual log file (VLF) in the specified transaction log. This message reports the SQL Server database ID and the VLF ID and block ID at which the error occurred. As a result of this error, the Extractor read few bytes than expected.
Verify that the system user that runs the Extractor has sufficient permissions to access the log files. If the problem persists, contact Informatica Global Customer Support for assistance.