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bkp2.doc
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BACKUP.DOC -- Changes from V1 to V2(216)
October 1975
Copyright (C) 1975,1976,1977
Digital Equipment Corporation, Maynard, Mass.
This software is furnished under a license for use only on a single
computer system and may be copied only with the inclusion of the above
copyright notice. This software, or any other copies thereof, may not
be provided or otherwise made available to any other person except for
use on such system and to one who agrees to these license terms.
Title to and ownership of the software shall at all times remain in
DEC.
The information in this software is subject to change without notice
and should not be construed as a commitment by Digital Equipment
Corporation.
DEC assumes no responsibility for the use or reliability of its
software on equipment which is not supplied by DEC.
BKP2.DOC Page 2
BACKUP.DOC -- Changes from V1 to V2(216)
October 1975
1.0 SUMMARY
This is the first field release of BACKUP, a program for transfering
files between disk and magnetic tape. This version of BACKUP is
intended to replace FAILSAFE as the system program for providing
backup storage of the disk file stucture system on magnetic tape.
Version 2 of BACKUP must be loaded with SCAN version 7B, WILD version
7A, and field image versions of HELPER and ENDECR. BACKUP runs on all
supported monitors, and has been tested under 602 monitors.
Documentation for using BACKUP is contained in the help file
BACKUP.HLP, and in the specifications section of the software
notebooks. A program logic manual for BACKUP and it's worker module
BACKRS can be produced by submitting the source files (BACKUP.MAC and
BACKRS.MAC) to RUNOFF version 10.
2.0 EXTERNAL CHANGES
Version 1 e mode, a mode in which system
dependent overhead information was not included on tape. Version 2
has been expanded to support running in non-interchange mode and
including all system information on tape. This mode is now the
default and running in interchange mode is enabled by means of a
switch. All switches listed in the documentation are now supported.
3.0 KNOWN BUGS AND DEFICIENCIES
The following deficiences are known to exist in version 2:
Full .SCWLD style of pattern replacements are not yet implemented.
Waiting for DEC command standard.
"'NOT'", etc., in full .LKWLD implementation is not yet implemented.
LABEL command and writing labels are not yet implemented.
BKP2.DOC Page 3
4.0 INSTALLATION INSTRUCTIONS
Files involved:
BACKUP.MAC, BACKRS.MAC -- source files which make up this product.
BACKUP.SHR, BACKUP.LOW -- the executable files.
BACKUP.RNH -- input to RUNOFF v.10 to make the help file.
BACKUP.HLP -- the help file.
BACKUP.PLM, BACKRS.PLM -- program logic manuals extracted from the
source files by RUNOFF v.10.
To build the program, you must use MACRO v.50:
.LOAD BACKUP.MAC,BACKRS.MAC
.SSAVE BACKUP
This assumes MACTEN.UNV, UUOSYM.UNV and SCNMAC.UNV are on device UNV:
and that SCN7B.REL (SCAN version 7B), WLD7A.REL (WILD version 7A),
HELPER.REL and ENDECR.REL are on REL:.
5.0 INTERNAL CHANGES
None.
[End of BKP2.DOC]
[BKP1.DOC is appended as an integral part of BKP2.DOC]
BKP1.DOC Page 4
BACKUP.DOC -- V1
April 1975
1.0 summary
This is the first release of BACKUP, a program for transfering files
between systems via mag tape. Version 1 of BACKUP is designed to
facilitate interchange of files between sites, and soon all
DECsystem-10 software will be distributed in BACKUP format. Version 1
of BACKUP supports interchange mode only. In this mode BACKUP does
not write system specific information on tape, but only information
which is critical to the file itself. On a restore, system defaults
are applied. Version 1 is NOT intended as a replacement for FAILSAFE.
We strongly recommend against attempting to use it for this purpose.
(A future version of BACKUP will be generalized to support other modes
and will be suitable for performing system backup.)
Version 1 is being distributed to allow sites to become familiar with
the program which will become the principle tool for all DECsystem-10
software distributions. A phased switch-over to Backup is planned.
First, a parallel distribution (using BACKUP and FAILSAFE) of
unbundled software to selected test sites will be tried. Next a full
software distribution in parallel to all sites will be accomplished.
If problems are discovered and corrected during these tests, version
1A of BACKUP will be created and distributed. Finally, on successful
completion of these distributions, regular use of BACKUP for all
release distributions will begin and FAILSAFE format releases will no
longer be available.
Version 1 of BACKUP is classed as support category C. Please report
reactions, suggestions and problems with BACKUP via SPRs. We solicit
your input, and it will be forwarded directly to BACKUP's developers.
However, no SPRs will be answered and no correspondence will be
entered into. This early distribution of BACKUP has been done to give
your installation a chance to gain experience with this new program.
You may view it as an opportunity to participate in field-testing an
important new product.
This version of BACKUP must be loaded with SCAN version 7A, and field
image versions of HELPER and ENDECR. BACKUP runs on all supported
monitors.
Documentation for using BACKUP is contained in the help file
BACKUP.HLP. A program logic manual for BACKUP and it's worker module
BACKRS can be produced by submitting the source files (BACKUP.MAC and
BACKRS.MAC) to RUNOFF version 10.
BKP1.DOC Page 5
1.1 Disclaimers
1. Version 1 of BACKUP does not replace failsafe.
2. Not all features are implemented or tested. Expect problems
if you experiment with untested features.
3. BACKUP is support category C. Do not ask your software
specialist for help. SPRs will be acknowledged but not
answered.
2.0 EXTERNAL CHANGES
None.
3.0 KNOWN BUGS AND DEFICIENCIES
The following deficiences are known to exist in version 1:
Only interchange mode is supported.
Write recovery code to rewrite on tape errors doesn't work.
On read, the last occurance of a repeated block should be used instead
of the first.
Switches /NOSTRS and /OKPROTECTION are not supported.
Full .SCWLD style of pattern replacements are not yet implemented.
Unused INTERNs between routines should be cleaned out.
"'NOT'", etc., in full .LKWLD implementation is not yet supported.
Human interface on reel switching is poorly designed.
LABEL command and writing labels are not yet implemented.
T$CON record on new reel has not been implemented. This is needed to
ensure that new reel playback does not require previous reel.
Files cannot be non-contiguous on playback. Allow this and omit tape
blocks on write which are totally zero.
Fully general disk devices are not yet implemented.
There are duplicated internal routines, which should be fixed by force
loading parts of SCAN into the low segment.
BKP1.DOC Page 6
4.0 INSTALLATION INSTRUCTIONS
Files involved:
BACKUP.MAC, BACKRS.MAC -- source files which make up this product.
BACKUP.SHR, BACKUP.LOW -- the executable files.
BACKUP.RNH -- input to RUNOFF v.10 to make the help file.
BACKUP.HLP -- the help file.
BACKUP.PLM, BACKRS.PLM -- program logic manuals extracted from the
source files by RUNOFF v.10.
To build the program, you must use MACRO v.50:
.LOAD BACKUP.MAC,BACKRS.MAC
.SSAVE BACKUP
This assumes C.UNV and SCNMAC.UNV are on device UNV: and that
SCAN.REL (version 7A), HELPER.REL and ENDECR.REL are on REL:.
NOTE: DIRECT cannot as yet read BACKUP format tapes. Directory
listings can be produced by BACKUP by using the PRINT verb.
5.0 INTERNAL CHANGES
Not applicable for this release.
[End of BKP1.DOC]