Last updated....: 06/26/1998
Abstract........:         WSC  FLASH 9323



                         PSF/2 INTEGRITY AND LAZYWRITE

 OS/2  installations  may experience disk cache failures requiring reinstalla-
 tion of all PC software if LAZYWRITE caching is used.  This is not limited to
 systems with PSF/2 installed but is an exposure on any OS/2 system.  The OS/2
 installation process enables LAZYWRITE as the default!  We strongly recommend
 that LAZYWRITE be disabled in PSF/2 installations in order to guarantee  disk
 file integrity.

 LAZYWRITE  is an option in both the File Allocation Table (FAT) and High Per-
 formance File System (HPFS) file systems.  LAZYWRITE can be disabled  in  the
 following manner:

 FAT FILE SYSTEM

 To disable LAZYWRITE for disk partitions using the FAT file system remove the
 "LW"   parameter  from  the  DISKCACHE  statement  in  the  CONFIG.SYS  file.
 CONFIG.SYS may be found in the  root  directory  of  your  OS/2  boot  drive,
 (normally the C drive).  A typical DISKCACHE statement looks like the follow-
 ing:

        DISKCACHE=128,LW

 All  you  need  to do is remove the ",LW", save the file, shutdown and reboot
 your system.  Now all writes will be done directly to disk.

 HPFS FILE SYSTEM

 To disable LAZYWRITE for disk partitions using the HPFS file system  add  the
 following statement to your STARTUP.CMD file:

        C:\OS2\CACHE.EXE /LAZY:OFF

 The  STARTUP.CMD  file  is  in  the  root  directory of your OS/2 boot drive,
 (normally the C drive).  After you have modified STARTUP.CMD shutdown and re-
 boot your system.  Now all writes will be done directly to disk.