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- .th DUMP VIII 11/24/73
- .sh NAME
- dump \*- incremental file system dump
- .sh SYNOPSIS
- .bd dump
- [ key [ arguments ] filesystem ]
- .sh DESCRIPTION
- .it Dump
- makes an incremental file system dump
- on magtape
- of all files changed after a certain date.
- The
- .it key
- argument
- specifies the date and other options about the dump.
- .it Key
- consists of characters from
- the set
- .bd abcfiu0hds.
- .s3
- .lp +5 5
- \fBa\fR Normally files
- larger than 1000 blocks are not incrementally dump;
- this flag forces them to be dumped.
- .s3
- .lp +5 5
- \fBb\fR The next argument is taken to be the maximum size
- of the dump tape in blocks (see \fBs\fR).
- .s3
- .lp +5 5
- \fBc\fR If the tape overflows, increment the last character
- of its name and continue on that drive.
- (Normally it asks you to change tapes.)
- .s3
- .lp +5 5
- \fBf\fR Place the dump on the next argument file
- instead of the tape.
- .s3
- .lp +5 5
- \fBi\fR the
- dump date is taken from the entry in the file
- /etc/dtab
- corresponding to the last time
- this file system was dumped with
- the
- .bd -u
- option.
- .s3
- .lp +5 5
- \fBu\fR the date just prior to this dump
- is written on
- /etc/dtab
- upon successful completion of this dump.
- This file contains a date for every
- file system dumped with
- this
- option.
- .s3
- .lp +5 5
- \fB0\fR the dump date is taken as the epoch
- (beginning of time).
- Thus this option causes an entire file system dump to be taken.
- .s3
- .lp +5 5
- \fBh\fR the dump date is some number of hours before the current date.
- The number of hours is taken from the next argument in
- .it arguments.
- .s3
- .lp +5 5
- \fBd\fR the dump date is some number of days before the current date.
- The number of days is taken from the next argument in
- .it arguments.
- .s3
- .lp +5 5
- \fBs\fR the size of the dump tape is specified in feet.
- The number of feet is taken from the next argument in
- .it arguments.
- It is assumed that there are 9 standard UNIX records per foot.
- When the specified size is reached,
- the dump will wait for reels to be changed.
- The default size is 2200 feet.
- .s3
- .i0
- .dt
- .dt
- If no arguments are given,
- the
- .it key
- is assumed to be
- .bd i
- and the file system is
- assumed to be
- /dev/rp0.
- .s3
- Full dumps
- should be taken on quiet file systems as follows:
- .s3
- dump 0u /dev/rp0
- .br
- ncheck /dev/rp0
- .s3
- The
- .it ncheck
- will come in handy in case it is necessary
- to restore individual files from this dump.
- Incremental dumps should then be taken
- when desired by:
- .s3
- dump
- .s3
- When the incremental dumps get cumbersome,
- a new complete dump should be taken.
- In this way,
- a restore requires
- loading of the complete dump tape and only the latest incremental tape.
- .sh DIAGNOSTICS
- If the dump requires more than one tape,
- it will ask you to change tapes.
- Reply with a new-line when this has been done.
- If the first block on the new tape is not writable,
- e.g. because you forgot the write ring,
- you get a chance to fix it.
- Generally, however, read or write failures are fatal.
- .sh FILES
- /dev/mt0 magtape
- .br
- /dev/rp0 default file system
- .br
- /etc/dtab
- .sh "SEE ALSO"
- restor (VIII), ncheck (VIII), dump (V)
- .sh BUGS
-