OpenVMS ALP_TH_Y2K01_062 Alpha V6.2 Y2K Fixes OpenVMS/Thai ECO Summary
TITLE: OpenVMS ALP_TH_Y2K01_062 Alpha V6.2 Y2K Fixes OpenVMS/Thai ECO Summary
Modification Date: 13-JUL-98
Modification Type: New Kit
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 1998. All rights reserved.
PRODUCT: DIGITAL OpenVMS/Thai Alpha
OP/SYS: DIGITAL OpenVMS Alpha
COMPONENT: Y2K Fixes for:
CLUE$SDA
DUMP
EXCHANGE
F11BXQP
LBRSHR
LIBRTL
MESSAGE_ROUTINES
MTAAACP.EXE
TECOSHR_TV
VERIFY
VMS$REMEDIAL_ID
SOURCE: Digital Equipment Corporation
ECO INFORMATION:
ECO Kit Name: ALP_TH_Y2K01_062
ECO Kits Superseded by This Kit **ONLY** for OpenVMS/Thai Alpha:
ALPF11X02_062 (Files-11 XQP file system)
ALPVERI02_062 (Analyze/Disk_Structure Utility)
ALPLIBR06_062 (LIB$ Run-Time Library)
ALPMTAA01_070 (Magnetic tape ACP)
ALPY2K02_062 (Year 2000 enhancement kit)
ECO Kit Approximate Size: 5922 Blocks
Kit Applies To: OpenVMS/Thai Alpha V6.2
System/Cluster Reboot Necessary: Yes
Rolling Re-boot Supported: Not Known
Installation Rating: 1 - To be installed on all systems running
the listed version(s) of OpenVMS.
Kit Dependencies:
The following remedial kit(s) must be installed BEFORE
installation of this kit:
None
In order to receive all the corrections listed in this
kit, the following remedial kits should also be installed:
None
ECO KIT SUMMARY:
An ECO kit exists for several components on OpenVMS/Thai Alpha V6.2.
o Conditions Addressed in This Kit
This document identifies certain conditions you should be
aware of when preparing your OpenVMS environment for the year
2000. This kit contains minor modifications to several older
components of the operating system; other conditions are simply
noted here, but need no changes.
o EXCHANGE
When the EXCHANGE utility is used to transfer files between
OpenVMS and RT-11 or DOS-11 systems, date problems could occur
starting in the year 2004 for RT-11 and in the year 2036 for
DOS-11.
This kit contains an enhancement to EXCHANGE that makes the RT-
11 date format continue to function correctly until the year
2099.
NOTE:
RT-11 volumes are also used as console storage media on
certain older VAX systems. DIGITAL transferred the RT-11
operating system, along with other PDP-11 software, to
Mentec in 1994.
o RSX-11 backwards compatible code:
The following sections describe conditions you should be aware
of if you interoperate with RSX-11 or if you use RSX-11 software
on your OpenVMS system.
+ File System $QIO Interface
The file system $QIO interface supports several attributes
for RSX-11 compatibility. Of these, ATR$C_EXPDAT and
ATR$C_ASCDATES return the file creation date, revision
date, and expiration date using 2-digit years.
These attributes are not normally used by native code and
can be replaced with the following documented, compliant
interfaces:
ATR$C_CREDATE
ATR$C_EXPDATE
ATR$C_REVDATE
The file system $QIO interface is provided by the following file
systems:
DIGITAL TCP/IP Network File System (NFS) client
Distributed File System (DECdfs)
Magnetic tape ACP
OpenVMS ODS-1 file system
OpenVMS ODS-2 file system
+ ODS-1 File Header Format and Utility Support
For RSX-11 compatibility, OpenVMS VAX supports ODS-1
file format disk volumes. The ODS-1 file system uses
a 2-digit year format internally, and current implementations
have limitations for the year 2000.
The magnetic tape ACP also returns an ODS-1 format file
header in response to an application request for the
ATR$C_HEADER attribute.
ODS-1 data structures use a 2-digit year (ddmmmyy) in the
following items:
* ODS-1 file header:
FI1$T_CREDATE
FI1$T_CRETIME
FI1$T_EXPDATE
FI1$T_REVDATE
FI1$T_REVTIME
+ ODS-1 home block: HM1$T_CREDATE
The OpenVMS VAX file system and the following OpenVMS
utilities that support the ODS-1 file system format
have been modified to correctly interpret these 2-digit
years until the year 2057:
Analyze/Disk_Structure Utility
Backup Utility
Dump Utility
Librarian (LBR) routines
NOTE:
Even though the ODS-1 code is being updated for the year
2000, DIGITAL strongly recommends that users of ODS-1
formatted media move to a newer file format by the year
2000.
o LIB$ Run-Time Library
In the run-time library, the LIB$CONVERT_DATE_STRING routine
allows the user to select a 2-digit year format (as well as
many others). This routine interprets 2-digit years as belonging
to the century in which the system is currently running (ac-
cording to the system clock). For example, in the 1900s, 61 is
interpreted as 1961, and starting January 1, 2000, 61 will be
interpreted as 2061. If this behavior could produce unexpected
results on your system, select one of the alternatives to the
2-digit year format.
o TECO Editor
+ The date value in the TECO editor has been extended to a
longword so that the year value returned by the Ctrl/B
function will not overflow on 01-JAN-2028.
+ This kit also fixes a TECO problem that is unrelated to
dates. The UIC value returned by the 2EJ function was incor-
rect if the process UIC had a group or member number greater
than 377.
For compatibility reasons, the 2EJ value cannot be changed.
However, the problem has been fixed by the following
changes:
* All group and member numbers that exceed a byte are
now mapped to 377 (octal).
* A 3EJ function has been implemented to return the
longword UIC.
The following TECO example demonstrates the change.
NOTE: The ESCAPE () sequence can be entered on
most keyboards by typing Ctrl/[.
$ SET UIC [1234,567]
$ TECO
*3EJ/65536==
1234
*3EJ&65535==
567
o This kit also includes fixes unrelated to the year 2000 for
the Analyze/Disk_Structure utility, the Backup Utility, the
Files-11 XQP file system, and the LIB$ Run-Time Library. These
fixes were released earlier in separate kits, but now have been
incorporated into this kit *ONLY* for this OpenVMS/Thai Alpha
V6.2.
All Year 2000 enhancements shipped in this kit will be included
in the operating system starting with the release that follows
OpenVMS/Thai Alpha Version 7.1.
INSTALLATION NOTES:
The images in this kit will not take effect until the system is
rebooted. If there are other nodes in the VMScluster, they must
also be rebooted in order to make use of the new image(s).
This patch can be found at any of these sites:
Colorado Site
Georgia Site
Files on this server are as follows:
alp_th_y2k01_062.README
alp_th_y2k01_062.CHKSUM
alp_th_y2k01_062.CVRLET_TXT
alp_th_y2k01_062.a-dcx_axpexe
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