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 1996.  All rights reserved.

PRODUCT:    OpenVMS VAX

COMPONENT:  Volume Shadowing for OpenVMS  (Phase II)

SOURCE:     Digital Equipment Corporation

ECO INFORMATION:

     ECO Kit Name:  VAXSHAD01_070
     ECO Kits Superseded by This ECO Kit:  None
     ECO Kit Approximate Size:  234 Blocks
     Kit Applies To:  OpenVMS VAX V7.0
     System/Cluster Reboot Necessary:  Yes


ECO KIT SUMMARY:

An ECO kit exists for Volume Shadowing on OpenVMS VAX V7.0.
This kit addresses the following problems:

  o  Attempts to start or restart copies may fail, usually after
     after a node halt, shutdown or reboot.  Additional symptoms
     observed include inconsistent values for HBS_CIP when compared
     to SHADOW_MAX_COPY, negative values for HBS_CIP and copies
     that should continue starting over from the beginning.

  o  System hangs may occur when I/Os pending to a shadow set do
     not complete.

  o  If a DCD (Disk Copy Data) copy is interrupted by a mini-merge,
     the copy will restart at 0% copied (LBN 0) rather than continuing
     from where it left off.

  o  A two-member shadowset with member index 0 a copy target and
     index 1 the only source member experiences a node failure on a
     node serving the disks.  The source member becomes "available".
     The source index is never acknowledged and the system remains
     with the set hanging in mount verification forever.

  o  UCB$L_MAXBCNT is not set up for system disks before the  first
     writes are enabled for that device.  The attempt to issue a
     write without having this field initialized results in a
     SHADDETINCON bug check.


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: 'VAXSHAD01_070' or 'VAXSHAD'.


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    |
  +----------------------------+----------+-----------------+--------------+
  | SHDRIVER.EXE               |%X2A50C4EC| X-112B1         | 25-JAN-1996  |
  |                                       |                 | 15:07:15.99  |
  +----------------------------+----------+-----------------+--------------+