H133305 - POTENTIAL DATA MODIFICATION W/NETFINITY
 
 SYMPTOM:
 This is an update to the original RETAIN tip released in April
 1996 on this subject.
 
 Through on-going product testing at IBM, a potential data
 modification problem was identified in Desktop PC systems
 being tested with OS/2 2.x or 3.x and either Netfinity,
 SystemView for OS/2, or WARP Server.
 
 The original failure was discovered in a controlled lab
 environment while stress-testing a system using the software
 stated above and lab tools.
 
 More recent findings reveal that any brand of Personal
 Computer or Server can be affected.  The exact failure
 symptoms vary; however the most frequently encountered are:
 System Hangs and TRAP 000D, usually followed by the file
 "FOUND.XXX" being created if "CHKDSK" is properly executed
 during the next system re-boot,
 (Where XXX could be numbers ranging from 000 - 999).
 
 PROBLEM ISOLATION AIDS:
 The results from testing indicated the failure could
 occur if the following conditions were met.
 
 - Two installed hardfiles performing multiple sustained file
   writes simultaneously.  Disk activity of both drives is at
   or near 100%.
 
 - And using the following software:
   OS/2 v2.x or v3.x installed.
   Netfinity, SystemView for OS/2, or WARP Server installed.
 FIX:
 A software fix is available from the IBM PC Company BBS at
 919-517-0001.  The file is located in Netfinity section,
 Directory #40, and is titled: NFDASD.FLT
 
 The fix image may also be downloaded via the Internet at the
 following URL:
              http://www.pc.ibm.com/files.html
 
 NFDASD.FLT replaces the file by the same name used in Netfinity,
 SystemView for OS/2, and WARP Server applications.  The new
 NFDASD.FLT filter corrects flawed logic in the disk I/O chaining
 routine under high activity to multiple hard drives.
 
 December 13, 1996