Mystery of frequent occurence of Event id 14197

Issue: Recently  I worked on a case where we were getting  following  eventid Event Type: Error Event Source: Microsoft ISA Server Web Proxy Event Category: None Event ID: 14197 Date: 04/11/2011 Time: 12:05:03 AM User: N/A Computer: ISA01 Description: ISA Server was unable to write content to the cache file.   Frequently during certain periods…