DUMP(8) COMMAND REFERENCE DUMP(8)
NAME
dump - generalized dump utility
SYNOPSIS
/etc/dump key [ argument ... ] filesystem
DESCRIPTION
If a file system is specified, dump copies to specified
media all files changed after a certain date in that
filesystem. The key specifies the date and other options
about the dump; key consists of characters from the set
0123456789bfusdWnFS.
OPTIONS
0-9 This number is the `dump level'. All files modified
since the last date stored in the file /etc/dumpdates
for the same file system at lesser levels will be
dumped. If no date is determined by the level, the
beginning of time is assumed; thus the option 0 dumps
the entire file system. Levels 1-9 provide for
incremental dumps. For example, if a file system is
dumped with level 4 on Tuesday and level 5 on Wednesday,
then Wednesday's dump contains those files on that file
system which changed after the Tuesday dump.
b Use alternate buffer size; the number must follow key
specifications and will be interpreted as number of 1K
blocks (the default is 10K). The purpose of this option
is to speed dumps to certain media; if the S option is
specified, this is automatically set to 128 (i.e.,
128k). This option should not be used with flexible
disk media.
f Place the dump on the next argument file or device
instead of the default media. Target media can be 9
track tape, cartridge tape or flexible disk. The device
can be local or remote (LAN access), where remote is
indicated by a "node:" prefix to the path name. If the
device is remote it must be owned by daemon, as root
privileges do not extend across the LAN.
u This is necessary for incremental dumps. If the dump
completes successfully, write the date of the beginning
of the dump on file /etc/dumpdates. This file records a
separate date for each file system and each dump level.
The format of /etc/dumpdates is readable by people,
consisting of one free format record per line: file
system name, increment level, and ctime(3c) format dump
date. The file /etc/dumpdates may be edited to change
any of the fields, if necessary.
s The size of the dump media is specified by the next
Printed 4/6/89 1
DUMP(8) COMMAND REFERENCE DUMP(8)
argument. When the specified size is reached, dump will
wait for media to be changed. The default size is 2000
feet for 9 track tapes, 360K for flexible disk, and 450
feet for cartridge tape.
d The density of the tape, expressed in BPI, is taken from
the next argument; this is used in calculating the
amount of tape used per volume. The default is 1600 for
9 track tape and 8000 for cartridge tape.
W The dump program tells the operator what file systems
need to be dumped. This information is gleaned from the
files /etc/dumpdates and /etc/fstab. The W option
causes dump to print out, for each file system in
/etc/dumpdates the most recent dump date and level, and
highlights those file systems that should be dumped. If
the W option is set, all other options and parameters
are ignored, and dump exits immediately.
w Is like option W, but w prints only those file systems
which need to be dumped.
F Specifies flexible disk backup media (9-track tape is
default).
S Specifies streaming cartridge tape backup media (9-track
tape is default).
n Whenever dump requires operator attention, notify by
means similar to a wall(1) all of the operators in the
group "operator".
The dump program requires operator intervention on these
conditions:
end of media, end of dump, media write error, media
open error or disk read error (if there are more than a
threshold of 32).
In addition to alerting all operators implied by the key,
dump interacts with the operator on dump's control terminal
at times when dump can no longer proceed, or if something is
grossly wrong. All questions dump poses must be answered by
typing yes or no, appropriately.
Since making a full dump involves a lot of time and effort,
dump checkpoints itself at the start of each media volume.
If writing that volume fails for some reason, dump will,
with operator permission, restart itself from the checkpoint
after the old tape has been rewound and removed, and a new
tape has been mounted.
Printed 4/6/89 2
DUMP(8) COMMAND REFERENCE DUMP(8)
The dump program tells the operator what is going on at
periodic intervals, including usually low estimates of the
number of blocks to write, the number of volumes it will
take, the time to completion, and the time to the volume
change. The output is verbose, so that others know that the
terminal controlling dump is busy, and will be for some
time.
EXAMPLES
/etc/dump 0fu /dev/tc /dev/ds00a
(dump entire file system /dev/ds00a to local device)
/etc/rdump 0fu nodename:/dev/rmt1 /dev/ds00a
(dump entire file system to remote device /dev/rmt1 on
host nodename)
/etc/dump 0fFu /dev/rdf /dev/ds00a
(dump entire file system to local flexible disk)
/etc/dump 0fbu /dev/rmt 60 /dev/ds00a
(dump entire file system to local 9 track tape with
buffering of 60K)
/etc/dump w
(ask dump to list file systems that need to be dumped)
FILES
/dev/ds00a default file system
/dev/tc default target device (cartridge tape)
/etc/dumpdates new format dump date record
/etc/fstab dump table: file systems and frequency
/etc/group to find group operator
SEE ALSO
fstab(5), restore(8), rrestore(8n), and rdump(8n).
Printed 4/6/89 3
%%index%%
na:240,83;
sy:323,269;
de:592,542;
op:1134,2910;4356,3063;7731,468;
ex:8199,905;
fi:9104,488;
se:9592,210;
%%index%%000000000140