Sun Microsystems Sun Workstation 100U System Manager's Manual page 180

DUMP(8)
MAINTENANCE COMMANDS
DIDv.fP (8)
NAME
dump - incremental file system dump
SYNOPSIS
/ etc/ dump
I
key
I
tJrgument ... ] filesystem
J
DESCRIPTION
Dt)mp copies to magnetic tape all files changed after a certain date in the jiJeeyetem. The key
sF~cifies the date and other options about the dump. Key consists or characters rrom the set
O,Z345&'1SGrusdWnc.
O~G
This number is the 'dump level'. All files modified since the last date stored in the file
/ etc/ dumpdtJtea tor the same filesystem at lesser levels will be dumped.
If no date is deter-
mined by the level, the beginning of time is assumed; thus the entire filesystem is dumped ir
the 0 option is used.
t
Place the dump on the next tJrgument file instead or the tape. It file is or the form
machine:device, dump to a remote machine.
u If the dump completes successrully, write the date or the beginning or the dump on file
/ etc/ dumpdtJtee. This file records a separate date for each filesystem and each dump level.
The format of / eec/ dumpdtJtes is readable by people, consisting or one free format record per
line: filesystem name, increment level and ctime(9) format dump date. / etc/ dumpdtJtee may
be
edited to change any of the fields, if necessary.
• The size or the dump tape is specified in feet. The number of feet is taken from the next
tJrgument. When the specified size
is reached,
dump waits for reels to
be changed. The
default tape size is 2300
teet.
d The density of the tape, expressed in BPI, is taken from the next tJrgument. This is used in
calculating the amount of tape used per reel. The default is 1600.
W
Dump tells the operator what file systems need to be dumped. This information is gleaned
from the files / etc/ dumpdtJtea and / etc/lettJb. The W option causes dump to print out, ror
each file system in / etc/ dumpdtJtee 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 are
ignored, and dump exits immediately.
w Is like W, but prints only those filesystems which need to be dumped.
D
Whenever dump requires operator attention, notify by means similar to a wtJll(l) an or the
operators in the group "operator".
c Dump to cartridge tape instead of standard half-inch magnetic tape.
b Specifies the bloclting ractor ror the dump. The blocking factor is taken from the next argu-
ment on the command line. The default blocking factor is 10.
It no arguments are given, the ke1l is assumed to
be
Gu and a default file system is dumped to the
default tape.
Dump requires operator intervention on
these
conditions: end of
tape~
end of dump, tape write
error, tape open error or disk read error (it there are more than a threshold or 32). In addition to
alertinl aU operators implied by the n key, dump interacts with the operator on dump'8 control
terminal at times when dump can no longer proceed, or if something is grossly wrong. All ques-
tions dump poses
muat
be answered by typing "yes" or "no", appropriately.
Since making a dump involves a lot of time and efl'ort tor tull dumps, dump checkpoints itselr at
the start
ot
each tape volume. U writing that volume tails tor some reason, dump will, with
operator
permi~si.)n,
restart itself trom the checkpoint uter the old tape has been rewound and
removed, and a new tape has been mounted.
Sun Relea8f 1.1 Last change: 28 October 1983
25