DUMP(VIII) 11/24/73 DUMP(VIII)
NAME
dump - incremental file system dump
SYNOPSIS
dump [ key [ arguments ] filesystem ]
DESCRIPTION
Dump will make an incremental file system dump on magtape of
all files changed after a certain date. The argument key,
specifies the date and other options about the dump. Key
consists of characters from the set iu0hds.
i the dump date is taken from the file /etc/ddate.
u the date just prior to this dump is written on
/etc/ddate upon successful completion of this dump.
0 the dump date is taken as the epoch (beginning of
time). Thus this option causes an entire file system
dump to be taken.
h the dump date is some number of hours before the
current date. The number of hours is taken from the
next argument in arguments.
d the dump date is some number of days before the
current date. The number of days is taken from the
next argument in arguments.
s the size of the dump tape is specified in feet. The
number of feet is taken from the next argument in
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 1700 feet.
If no arguments are given, the key is assumed to be i and
the file system is assumed to be /dev/rp1.
Full dumps should be taken on quiet file systems as follows:
dump 0u /dev/rp1
check -l /dev/rp1
The check will come in handy in case it is necessary to
resore individual files from this dump. Incremental dumps
should then be taken when desired by:
dump
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.
FILES
/dev/mt0magtape
/dev/rp1default file system
/etc/ddate
SEE ALSO
restor (VIII), check (VIII), dump (V)
BUGS