A client has encountered the error 824 and the sql server log contains this information: SQL Server detected a logical consistency-based I/O error: torn page (expected signature: 0x55555555; actual signature: 0x55565555). It occurred during a read of page (3:757128) in database ID 5 at offset 0x00000172150000 in file 'c:mydata... Running dbcc checkdb on that database returns no error. What are the possible causes for torn page? Should I ask my client to run some MS utilities? I find a MS utility named SQLIOSim. Thanks for any help.