Monitor unlimited number of servers
Filter log events
Create email and web-based reports

Direct access to Microsoft articles
Customized keywords for major search engines
Access to premium content

Event ID: 509 Source: ESE

Source
Level
Description
Information Store (<PID>) First Storage Group: A request to write to the file "<file>" at offset <offset> (<offset>) for <value> (<value>) bytes succeeded but took an abnormally long time (<value> seconds) to be serviced by the OS. In addition <value> 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 <value> seconds ago. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem.
Comments
 
In my case, file system defragmentation was in progress when the events were logged. For information about file system defrag on Exchange databases from the Exchange Development team, see the link to "The Microsoft Exchange Team Blog".
As per Microsoft: "This problem may be caused by faulty hardware. This problem may also be caused if the server or disk subsystem is not correctly configured". See MSEX2KDB for additional information about this event.
From a newsgroup post: "It sounds like there is a hardware problem that is showing up during either the Backup or IS maintenance, which both run at night. As a start one recommendation is to make sure that IS maintenance and the Backup are not running at the same time as they will conflict.
In addition, another recommendation is to make sure that your storage solution is optimized. Read ME317173 and ME326294 for details on this issue". See the link to "Google thread - Event ID 509" for the original thread.

Windows Event Log Analysis Splunk App

Build a great reporting interface using Splunk, one of the leaders in the Security Information and Event Management (SIEM) field, linking the collected Windows events to www.eventid.net.

Read more...

 

Cisco ASA Log Analyzer Splunk App

Obtain enhanced visibility into Cisco ASA firewall logs using the free Firegen for Cisco ASA Splunk App. Take advantage of dashboards built to optimize the threat analysis process.

Read more...