ECO NUMBER:     VAXMTAA03_062
             PRODUCT:        OpenVMS VAX OPERATING SYSTEM 6.2
             UPDATE PRODUCT: OpenVMS VAX OPERATING SYSTEM 6.2




                                COVER LETTER


1  KIT NAME:

     VAXMTAA03_062


2  KITS SUPERSEDED BY THIS KIT:

     VAXMTAA02_062


3  KIT DEPENDENCIES:

     3.1  The  following  remedial  kit(s)  must  be  installed   BEFORE
          installation of this, or any required kit:

     VAXY2K02_062


     3.2  In order to receive all the corrections listed  in  this  kit,
          the following remedial kits should also be installed:


     VAXSYSA02_062
     VAXBACK03_062
     VAXMOUN03_062
     VAXDISM02_062
     VAXINIT01_062



4  KIT DESCRIPTION:

     4.1  Version(s) of OpenVMS to which this kit may be applied:

     OpenVMS VAX V6.2


     4.2  Files patched or replaced:


      o  [SYSLIB]MTAAACP.EXE (new image)



5  PROBLEMS ADDRESSED IN VAXMTAA03_062 KIT


      o  A possible system crash occurs during Host Based  RAID  Unbinds
         with  MME code enabled.  A mailbox read synchronization problem
         causes the crash.

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                                                      19 November 1998


         This problem only occurs when a host-based RAID UNBIND  command
         is done while an MME-based application is running.

         This problem can occur in several different code areas  of  the
         operating system.  In order to eliminate all known instances of
         this  problem,  the   following   remedial   kits   (or   their
         supersedants) will also need to be installed:

         VAXSYSA02_062
         VAXBACK03_062
         VAXMOUN03_062
         VAXINIT01_062
         VAXDISM02_062


      o  A process using MME could potentially "miss" the VOL1 label  on
         a  tape.  Also, a process could "hang" trying to send a message
         to the MME process.



6  PROBLEMS ADDRESSED IN VAXMTAA02_062 KIT


      o  This kit is a  re-issue  of  the  VAXMTAA01_062  kit  with  the
         OpenVMS   V6.2   portion   only.    The  V6.1  section  of  the
         VAXMTAA01_062 kit will be superseded by a future Shadowing kit.



7  PROBLEMS ADDRESSED IN VAXMTAA01_062 KIT FOR OPENVMS VAX V6.2


      o  The system crashes with a NOBVPVCB bugcheck.  The crash  occurs
         on the kernel stack with MTAAACP.EXE as the current image.

      o  The system crashes with  an  XQPERR  while  dismounting  a  MAD
         drive.



8  KIT INSTALLATION RATING:

     The following kit  installation  rating,  based  upon  current  CLD
     information,  is  provided  to  serve as a guide to which customers
     should apply this remedial kit.  (Reference attached Disclaimer  of
     Warranty and Limitation of Liability Statement)

     INSTALLATION RATING:

       INSTALL_3 : To  be  installed  by  customers  experiencing  the  problems
           corrected.


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                                                      19 November 1998


9  INSTALLATION INSTRUCTIONS:

     Install this kit with the VMSINSTAL utility  by  logging  into  the
     SYSTEM account, and typing the following at the DCL prompt:

         @SYS$UPDATE:VMSINSTAL VAXMTAA03_062 [location of the saveset]

     The saveset location may be a tape drive, or a disk directory  that
     contains the kit saveset.

     No reboot is necessary after successful installation of the kit.


     Copyright  (c)  Compaq  Computer  Corporation,  1998   All   Rights
     Reserved.   Unpublished rights reserved under the copyright laws of
     the United States.

     The software contained on this media is proprietary to and embodies
     the   confidential   technology  of  Compaq  Computer  Corporation.
     Possession, use, or dissemination of  the  software  and  media  is
     authorized  only  pursuant  to  a valid written license from Compaq
     Computer Corporation.

     DISCLAIMER OF WARRANTY AND LIMITATION OF LIABILITY

     THIS PATCH IS PROVIDED AS IS, WITHOUT WARRANTY OF  ANY  KIND.   ALL
     EXPRESS  OR  IMPLIED  CONDITIONS,  REPRESENTATIONS  AND WARRANTIES,
     INCLUDING ANY IMPLIED  WARRANTY  OF  MERCHANTABILITY,  FITNESS  FOR
     PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED TO THE
     EXTENT PERMITTED BY APPLICABLE LAW.  IN NO  EVENT  WILL  COMPAQ  BE
     LIABLE  FOR  ANY  LOST REVENUE OR PROFIT, OR FOR SPECIAL, INDIRECT,
     CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER  CAUSED  AND
     REGARDLESS  OF  THE  THEORY OF LIABILITY, WITH RESPECT TO ANY PATCH
     MADE AVAILABLE HERE OR TO THE USE OF SUCH PATCH.