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subsys/dumper.hlp
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Format
@DUMPER
DUMPER 25-DEC-75
DUMPER> command arguments
command is a DUMPER action-command, tape-positioning
command, or status-command. Table n contains a
list of the DUMPER commands, grouped by function.
arguments is a file specification, date, density, parity,
drive number, number, or save-set name, depending
on the command.
dates are in the form day-month-year.
Type January 16, 1975 as 16-JAN-75.
times are in 24-hour format (hh:mm:ss),
or in AM, PM form. Thus 9:23 in
the evening is either 21:23, or
9:23 PM.
filespecs
sources
destination are in the form
dev:<dir>name.typ.gen. The * and %
wildcard characters are permitted.
Separate multiple source file
specifications with commas.
save-set name is a string of alphanumeric
characters which is used as a title
for a save set.
DUMPER Commands
ACTION-COMMANDS
DUMPER action commands start, stop, interrupt or continue a
file transfer or file check.
CHECK (ALL MTA FILES)
Checks the files in the current save set to make sure that
they agree with the files on disk. The system prints a
message if the files do not agree; refer to items 1 and 2 in
the error section. Be sure to rewind the tape to the
beginning of the save set before giving the CHECK command.
CONTINUE
Continues a CHECK, RESTORE, SAVE or tape-positioning command
after you have typed a CTRL/E to halt it. If you have
prevented DUMPER from continuing, the system prints ?CANNOT
CONTINUE on your terminal.
CTRL/E
Halts the action of a CHECK, RESTORE, SAVE, or
tape-positioning command. When the system processes the
CTRL/E, it prints a message, suspends the action, then prints
the DUMPER prompt.
INTERRUPTING...
DUMPER>
After typing CTRL/E, you may give a CONTINUE, DIRECTORIES,
EXIT, FILES, HELP, or SILENCE command. If you give any other
command, DUMPER loses the information necessary to continue
the action you halted.
EXIT
Exits immediately to system command level.
HELP
Prints a list of the valid DUMPER commands on your terminal.
PRINT (DIRECTORY OF TAPE ONTO FILE) destination
Prints a directory of the current save set to the specified
file specification. You must type a destination file
specification, but if you use recognition, the system defaults
to TTY: (your terminal).
RESTORE (MTA FILES) sources (TO) destination
Restores the magnetic tape source file(s) to disk with the
given destination file specification(s). You must type a
source file specification. If you do not type a destination
file specification, the system uses *.*.*.
When the restore operation starts placing files in a
directory, the system prints the message:
LOADING FILES INTO <directory>
where directory is the name of the directory.
If you are restoring files saved from another disk area to
your own disk area, you must explicitly specify the directory
name in the source file specifications.
Since all commands and programs assume that the most recent
file (in a group of files with the same file name and type) is
the one with the highest generation number, you should try to
avoid a situation where the most recent file has other than
the highest generation number. The easiest way is to use the
destination file specification *.*.-1 in your RESTORE command.
This file specification forces all restored files to have a
generation number one greater than any existing file with the
same file name and type. Should you not give *.*.-1 as a
destination file specification and if you are restoring:
1. A file that is newer than a disk file with the same file
name and type,
2. With the current mode set to SUPERSEDE OLDER (the default
mode), and
3. The file on tape has a generation number lower than the
file on disk,
the system deletes the disk file(s) and issues the warning
message:
% FILE filespec DELETED WHILE SUPERSEDING
where filespec identifies the disk file that is deleted.
Under these conditions, the system does not delete the disk
file if it has a lower generation number than the magnetic
tape file (unless your FILE GENERATION-RETENTION-COUNT is
one).
If you set the mode to SUPERSEDE ALWAYS, the system does not
check for older files with higher generation numbers and you
may get newer files with lower generation numbers.
If you set the mode to SUPERSEDE NEVER, the system will not
restore a file if one with the same file name and type exists,
so the problem of newer files with lower generation numbers
will not occur.
When the system gets to the end of the current save set or to
the end of the tape, it prints the message:
Any more tapes? YES
Answer NO if you are at the end of a save-set; answer YES if
the save set continues onto another tape. If you answer YES,
the system prints:
TAPE (FILESPEC) MTA0:
Mount the new tape, then type the name of the drive on which
you mount it. (If you have to run the PLEASE program, refer
to the instructions in the SAVE command description.)
SAVE (DISK FILES) sources (as) destination
Saves the disk source file(s) onto magnetic tape. If you do^
not give any arguments to the SAVE command, DUMPER saves all
the files in your connected directory.
A save set is the group of files saved by a single SAVE
command. You may give the save set a name by giving the
SSNAME command.
DUMPER prints information about the saved files every time you
give the SAVE command. Refer to the LIST command if you want
to alter this function.
If all the files in the save set cannot fit on a single tape,
the system stops at the end of the tape, rewinds it, and
prints the message:
End of tape, continue save on
TAPE (FILESPEC) MTA0:
Mount a fresh tape, then type the name of the magnetic tape
drive. The system prints a header, then continues the save.
If you have to run the PLEASE program to get the operator to
mount the tape, type a CTRL/C, give the PUSH command, run the
PLEASE program, give the POP command, give the CONTINUE
command, type a CTRL/R, then type the name of the magnetic
tape drive. Follow the next example:
End of tape, continue save on
TAPE (FILESPEC) ^C Type CTRL/C to stop DUMPER
@PUSH (COMMAND LEVEL) Give the PUSH command
(or DUMPER can not continue)
TOPS-20 1(100)
@PLEASE Run PLEASE
WHAT IS THE OPERATOR'S ID?
ENTER TEST: PLEASE MOUNT MY NEXT MAGTAPE ON MTA1:
[OPERATOR HAS BEEN NOTIFIED]
ALL DONE, USE MTA1: NOW.
$
[FINISHED AT 20:52:32]
@POP (COMMAND LEVEL) Give the POP command
@CONTINUE Give the CONTINUE command
Type a CTRL/R
TAPE (FILESPEC) MTA1: Then type the magnetic tape drive
number.
TAPE-POSITIONING COMMANDS
DUMPER tape-positioning commands control the tape you have
specified with the last TAPE command or the tape assigned to
the logical name MTA-DUMPER. You should have previously
allocated these drives to your job with the system ASSIGN
command.
EOT
Skips to the end of the last save set on the tape and prints
the message: TAPE POSITIONED AT EOT. If any save sets are
encountered, the system prints the save set names.
REWIND
Rewinds the tape to the logical beginning of tape (BOT).
SKIP (NUMBER OF SAVESETS) n
Skips the tape over n save sets.
SKIP (NUMBER OF SAVESETS) 0
Backspaces the tape to the beginning of the current save set.
SKIP (NUMBER OF SAVESETS) -n
Backspaces the tape over n save sets.
STATUS-COMMANDS
DUMPER status-commands set parameters which affect the
operation of the CHECK, RESTORE and SAVE commands. Once you
set a parameter, it stays in effect until you change it or
restart DUMPER.
ABEFORE (DATE AND TIME) date time
Includes only those files which were accessed by a non-write
operation (i.e., typed, printed or read in some manner) before
the given date and time.
ACCOUNT (OF RESTORED FILES FROM) location
Specifies that any file being restored will have either the
SYSTEM-DEFAULT account (usually your current account) or the
account that was stored with the file. Normally, the system
uses the system default.
ASINCE (DATE AND TIME) date time
Includes only those files which were accessed by a non-write
operation (i.e., typed, printed or read in some manner) since
the given date and time.
BEFORE (DATE AND TIME) date time
Includes only those files which were created or last written
(i.e., whose contents were changed) before the given date and
time.
[NO] CHECKSUM (FILES) TYPE
Turns on (or off) checksumming. there are two types of
checksum that may be specified. they are sequential and
by-pages. sequential checksums stop at eof. In interchange
mode, only sequential checksums should be used. By pages
checksums do every existing word of every existing page of
a file. This command works like the checksum sub-command
in the tops-20 command language. When checksumming is turned
on, it is causes checksums to be computed during the SAVE
and PRINT commands.
DENSITY (OF MAGTAPE) n
Sets the tape density to the given number of bits per inch
(BPI). The density must be 200, 556, 800, 1600, or
JOB-DEFAULT (set by the system command SET TAPE DENSITY). If
you do not give the DENSITY command, DUMPER uses the density
listed in the system command INFORMATION (ABOUT) TAPES.
[NO] DIRECTORIES
Starts (or stops, directory name if you type NO) printing on
your terminal each directory name as the directory is saved or
restored. Normally, the system prints each directory name.
[NO] FILES
Starts (or stops, if you type NO) printing on your terminal
each file specification as the file is saved or restored.
Normally, the system does not print each file specification.
FORMAT (VERSION NUMBER IS) n
Allows the system to read and write DUMPER tapes that were
written with other (unsupported) versions of DUMPER. The
default format is 2; BBN-TENEX users should use 0 to read and
write tapes created by BBN-DUMPER.
[NO] INITIAL (FILESPEC) filespec
Starts (or stops, if you type NO) checking, restoring, or
saving at the file identified by filespec.
[NO] INTERCHANGE (FORMAT)
Starts (or stops, if you type NO) using the DECsystem-10
(TOPS10 BACKUP) interchange format in reading and writing
tapes.
[NO] LIST (LOG INFORMATION ON FILE) filespec
Makes a list of the files transferred in the file identified
by filespec. If you do not give a file specification, DUMPER
uses the file LPT:DUMPER.LOG. By default,
LIST is turned off.
MBEFORE (DATE AND TIME) date time
Include only those files modified (i.e., written, created,
appended, or renamed) before the specified internal date and
time.
MSINCE (DATE AND TIME) date time
Includes only those files modified (i.e., written, created,
appended, or renamed) since the specified internal date and
time.
PARITY (OF MAGNETIC TAPE) type
Sets the parity of the current magnetic tape to EVEN or ODD.
DUMPER normally uses the parity listed in the system command
INFORMATION (ABOUT) TAPES.
PROTECTION (OF RESTORED FILES FROM) location
Takes the protection of the restored files from the
SYSTEM-DEFAULT (usually 770000) or from the tape.
SET TAPE-NUMBER n
Used for multI-reel savesets when continuing a restore after
a crash or when restoring a file non-sequentially from a
multI-reel saveset. Also used for continuing a save after a
crash:
DUMPER>INITIAL <JONES>*.*.*
DUMPER>SET TAPE-NUMBER 4
DUMPER>SAVE
[NO] SILENCE
Stops (or starts, if you type NO) printing directory names and
file specifications as the files are saved or restored.
SINCE (DATE AND TIME) date time
Includes only those files that were created or last written
(i.e., whose contents were changed) since the specified date
and time.
SSNAME name
Identifies a save set name of up to 30 alphanumeric
characters.
SUPERSEDE condition
Sets the condition under which DUMPER will supersede a disk
file with a magnetic tape file of the same file name and type.
Use ALWAYS when you always want to supersede the disk file
with the tape file. Use NEVER when you never want to
supersede the disk file; in this case, a file is transferred
from tape only if there is no disk file in the directory with
the same file name and type. Use OLDER when you want the tape
file to supersede only older disk files; in this case, a tape
file is transferred to disk file. If you do not give a
SUPERSEDE command, the system uses SUPERSEDE OLDER. Refer to
the RESTORE command.
TAPE (FILESPEC) MTAn:
Uses the specified tape for the file transfers. If the drive
is not available to your job, the system prints:
?INVALID FILESPEC, DEVICE IS NOT AVAILABLE TO THIS JOB
wait until you can assign a magnetic tape to your job. You do
not have to give a TAPE command if you assign a magnetic tape
device name to the logical name MTA-DUMPER.
Operation
1. Type DUMPER and press the RETURN key; the system prints
DUMPER, the date it was installed, and the prompt DUMPER>.
@DUMPER
DUMPER 25-DEC-75
DUMPER>
2. Give the DUMPER commands you want. (You must give a TAPE
command before giving an action command.) When you are
finished, give the EXIT command.
DUMPER> TAPE (FILESPEC) MTA1:
DUMPER> REWIND
DUMPER> SSNAME TEST1
DUMPER> SAVE
DUMPER TAPE # 1, TEST1, WEDNESDAY, 27-DEC-75 0958
TOTAL FILES DUMPED = 5
TOTAL PAGES DUMPED = 95
DUMPER> EXIT
@
Examples
1. Saving all the files in your connected directory-- To save all
files in your connected directory onto MTA0: in the save set
labeled Reference Files, then check the magnetic tape files
against the corresponding disk files:
@ASSIGN (DEVICE) MTA0: !Assign drive 0
@DUMPER !Start DUMPER
DUMPER 25-DEC-75
DUMPER>TAPE (FILESPEC) MTA0: !Tell DUMPER to use drive 0
DUMPER>REWIND !Move to the beginning of tape
DUMPER>SSNAME REFERENCE FILES !Declare the save-set name
DUMPER>SAVE (DISK FILES) !Give the SAVE command
DUMPER TAPE # 1, REFERENCE FILES, FRIDAY, 2-JAN-76 1432
<TPORADA>
TOTAL FILES DUMPED = 8
TOTAL PAGES DUMPED = 65
DUMPER>REWIND !Move to the beginning of tape
DUMPER>CHECK (ALL MTA FILES) !Check the saved files
DUMPER TAPE # 1, REFERENCE FILES, FRIDAY, 2-JAN-76 1432
ANY MORE TAPES? N !There is only one tape
DUMPER>EXIT !There are no errors, stop
@UNLOAD (DEVICE) MTA0: !Rewind tape onto source reel
@DEASSIGN (DEVICE) MTA0: !Return tape for other users
@
Hint
If you want the names of the saved files
printed on your terminal, give the FILES
command immediately after the SSNAME
command.
2. Saving a single file on tape-
@ASSIGN (DEVICE) MTA0: !Assign drive 0
@DUMPER !Start DUMPER
DUMPER 25-DEC-75
DUMPER>TAPE (FILESPEC) MTA0: !Tell DUMPER to use drive 0
DUMPER>REWIND !Go to beginning of tape
DUMPER>SSNAME FORTRAN PROGRAMS !Declare save-set name
DUMPER>FILES !Print file names as saved
DUMPER>SAVE (DISK FILES) TEST.FOR !Save TEST.FOR
DUMPER TAPE # 1, FORTRAN PROGRAMS, FRIDAY, 2-JAN-76 1442
<TPORADA>
TEST.FOR.1
TOTAL FILES DUMPED = 1
TOTAL PAGES DUMPED = 1
DUMPER>REWIND !Move to beginning of tape
DUMPER>CHECK (ALL MTA FILES) !Check the file
DUMPER TAPE # 1, FORTRAN PROGRAMS, FRIDAY 2-JAN-76 1442
ANY MORE TAPES? N !No more tapes
DUMPER>EXIT !End DUMPER
@UNLOAD (DEVICE) MTA0: !Rewind the tape onto source
reel
@DEASSIGN (DEVICE) MTA0: !Let other users have the
drive
@
3. To copy all the files from the second save set on the tape to your
disk area: (if a file already exists with the same file
specification, the file on tape is written only if it is newer
than the disk file; refer to the SUPERSEDE parameter command.)
@ASSIGN (DEVICE) MTA0: !Assign drive 0
@DUMPER !Start DUMPER
DUMPER 25-DEC-75
DUMPER>TAPE (FILESPEC) MTA0: !Use drive 0
DUMPER>REWIND !Go to beginning of tape
DUMPER>SKIP (NUMBER OF SAVESETS) 1 !Skip to end of first save set
DUMPER TAPE # 1, SATURDAY'S FILES, SATURDAY, 3-JAN-76 1151
DUMPER>RESTORE (MTA FILES) *.*.* (TO) !Restore all files
DUMPER TAPE # 1, LIBRARY FILES, SATURDAY, 3-JAN-76 1153
ANY MORE TAPES? N !No more tapes
DUMPER>SKIP 0 !Go to start of current save
set
DUMPER TAPE # 1, LIBRARY FILES, SATURDAY, 3-JAN-76 1153
DUMPER>CHECK (ALL MTA FILES) !Check files for errors
DUMPER TAPE # 1, LIBRARY FILES, SATURDAY, 3-JAN-76 1153
ANY MORE TAPES? N !No more tapes
DUMPER>EXIT !End DUMPER
@UNLOAD (DEVICE) MTA0: !Rewind tape onto source reel
@DEASSIGN (DEVICE) MTA0: !Return tape for other users
@
[End of DUMPER.HLP]