IMPORTANT NOTICE

Updated: 24-SEP-2003 (Use your browsers' Reload button to ensure you're viewing the most recent version)

To obtain this kit please call the Customer Support Centre or use the FTP site Search for this ECO kit and dependencies Search the Compaq FTP web site this kit (exact match) Search the Compaq FTP web site this or related ECOs

Copyright (c) Digital Equipment Corporation 1997.  All rights reserved.

PRODUCT:    OpenVMS Alpha

COMPONENT:  SYS$PUDRIVER.EXE

SOURCE:     Digital Equipment Corporation

ECO INFORMATION:

     ECO Kit Name:  ALPDRIV07_070
     ECO Kits Superseded by This ECO Kit:  None
     ECO Kit Approximate Size:  252 Blocks
     Kit Applies To:  OpenVMS Alpha V7.0
     System/Cluster Reboot Necessary:  Yes
     Installation Rating:  2 - To be installed on all systems running
                               the listed version(s) of OpenVMS and
                               using the following feature(s):

                               Any system running OpenVMS V7.0 that
                               uses the PUDRIVER.

     NOTE:  In order to receive the full fixes listed in this kit,
            the following remedial kits also need to be installed:

                 None


ECO KIT SUMMARY:

An ECO kit exists for SYS$PUDRIVER.EXE on OpenVMS Alpha V7.0.  This
kit addresses the following problems:

  o  A system crash occurs when an attempt is made to place a CDRP
     into a wait state and the CDRP is already in another incompatible
     wait state.

     The system has no messages available, and some CDRPs have been
     placed into the message wait queue.  A message response frees a
     message which is placed in the response ring.  Another message
     becomes available and the response ring fills up.  A check is
     then made for message waiters.  A waiter is found and a successful
     attempt is made to start it.  An attempt is then made to start
     the next waiter, but there are no more messages so the system
     begins looking for one.  When a message is found, a call is
     made into the SCS routine to start the first waiter which is the
     waiter that originally started the loop.  Eventually, a return
     is made to the first waiter which was already started in an
     inner loop.  The system then either waits or starts the waiter
     again which causes it to be in two states at the same time.

     This problem will only occur with a KCM44 controller because it
     issues the system 45 credits which are enough to exhaust the
     message queue if a heavy amount of IO is occurring.


RELATED ARTICLES:

Detailed articles describing the problems listed above may exist in
the OPENVMS database.  To view these articles, open the appropriate
product database and perform a query using either of the following
search strings: 'ALPDRIV07_070' or 'ALPDRIV'.


ECO KIT ORDERING INSTRUCTIONS:

If after an evaluation you wish to obtain this kit, request it
electronically using the appropriate Advanced Electronic Services
(AES) Service Tool.  If you are not familiar with how to request
kits electronically, open the DIA, WIS or DSNLINK database and
review the article entitled:

     [AES] How To Electronically Request ECO Kits Using Service Tools


INSTALLATION NOTES:

In order for the corrections in this kit to take effect, the system
must be rebooted.  If the system is a member of a VMScluster, the
entire cluster should be rebooted.
  
  ==========================================================================
  |                     Table of Kit Image Information                     |
  +----------------------------+----------+-----------------+--------------+
  |                            | Overall  | Image File      | Image Link   |
  | Image Name                 | Checksum | Identification  | Date/Time    |
  +----------------------------+----------+-----------------+--------------+
  | SYS$PUDRIVER.EXE           | 9D590067 | X-3             | 22-JAN-1997  |
  |                                       |                 | 10:49:36.78  |
  +----------------------------+----------+-----------------+--------------+