Hi,
We have experienced a lot of disk errors on a few of our Azure virtual machines. This weekend it happened again. In the event log we find that the first event is written by ESENT:
"svchost (1300) A request to write to the file "C:\Windows\system32\LogFiles\Sum\Svc.log" at offset 1306624 (0x000000000013f000) for 4096 (0x00001000) bytes succeeded, but took an abnormally long time (165 seconds) to be serviced by the OS. In addition, 0 other I/O requests to this file have also taken an abnormally long time to be serviced since the last message regarding this problem was posted 466 seconds ago. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem."
Then we get a lot of disk warnings stating that "The IO operation at logical block address..." was retried. This goes on until I logged on this morning to fix a stopped SQL Server (the server runs SQL Express). the event log shows the SQL server stopped quite soon after the error occured, SQLServerLogMgr::LogWriter complaining about disk IO errors.
Anyone else that have experienced the same thing?
The first half hour of event log messages:
Error12.07.2014 06:28:56 MSSQLSERVER9001 Server
Error12.07.2014 06:28:56 MSSQLSERVER9001 Server
Error12.07.2014 06:28:56 MSSQLSERVER17053 Server
Warning12.07.2014 06:28:54 Ntfs (Microsoft-Windows-Ntfs)153
Warning12.07.2014 06:28:42 disk153 None
[lots of similare events deleted to save som screen real estate]
Warning12.07.2014 05:50:32 ESENT533 General
Warning12.07.2014 05:48:00 ESENT508 Performance