OpenVMS ALPMSCP01_061 Alpha V6.1 - V6.1-1H2 TMSCP ECO Summary

 
NOTE:  An OpenVMS saveset or PCSI installation file is stored
       on the Internet in a self-expanding compressed file.
       The name of the compressed file will be kit_name-dcx_vaxexe
       for OpenVMS VAX or kit_name-dcx_axpexe for OpenVMS Alpha.
 
       Once the file is copied to your system, it can be expanded
       by typing RUN compressed_file.  The resultant file will
       be the OpenVMS saveset or PCSI installation file which
       can be used to install the ECO.
 
Copyright (c) Digital Equipment Corporation 1997.  All rights reserved.

OP/SYS:     OpenVMS Alpha 

COMPONENT:  TMSCP.EXE 

SOURCE:     Digital Equipment Corporation

ECO INFORMATION:

     ECO Kit Name:  ALPMSCP01_061 
     ECO Kits Superseded by This ECO Kit:  None 
     ECO Kit Approximate Size:  252 Blocks
     Kit Applies To:  OpenVMS Alpha V6.1, V6.1-1H1, V6.1-1H2 
     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):

                               Systems that MSCP serve tapes and disks.

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

                 ALPSHAD09_061 


ECO KIT SUMMARY:

An ECO kit exists for TMSCP on OpenVMS Alpha V6.1 through V6.1-1H2. 
This kit addresses the following problems: 

  o  Unexpected end messages are logged on client nodes for GUS and
     AVAILABLE commands.  A Cache Data Lost error is detected in the 
     tape subsystem due to a hardware-related problem.  A GUS end 
     message is returned to the client with an end message status of 
     08 (data error).  This status is set up in the SEND_END routine 
     in TMSCP.  Since this is not a valid status for a GUS, the client  
     TUDRIVER rejects the invalid status, logs an error and then calls
     TU$RE_SYNCH which breaks the connection.

  o  TMSCP may corrupt its own TMSCP$ERR_TBL.  This causes a system 
     crash due to a drive error with PLOST.

  o  A client process may hang when it attemps to mount a tape device 
     that is online to another host.

     Mount issues a packack for the device.  The client then issues
     a subsequent ONLINE command.  During TMSCP/ONLINE processing,
     if the server finds an HQB address in the UQB$L_ONLINE_HQB
     field, it returns SUCCESS status with an ALONL subcode even
     though the HQB is not for the requesting host.

     When the client processes the successful ONLINE end message it
     issues a GUS.  The server returns a unit-available for this
     command which causes the client TUDRIVER to reissue an ONLINE
     which  starts  the  process  all over again.  It stays in this
     loop forever.

  o  An INVEXCEPTN system crash may occur when TMSCP does not get a  
     message buffer during configuration when a connection to 
     MSCP$TAPE is broken.


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. 

Colorado Site
Georgia Site

alpmscp01_061.README
alpmscp01_061.CHKSUM
alpmscp01_061.CVRLET_TXT
alpmscp01_061.a-dcx_axpexe