HP-UX Reference (11i v2 03/08) - 1M System Administration Commands A-M (vol 3)

d
dump(1M) dump(1M)
dump and rdump require operator intervention for any of the following conditions:
• end of tape,
• end of dump,
• tape-write error,
• tape-open error, or
• disk-read error (if errors exceed threshold of 32).
In addition to alerting all operators implied by the
n option, dump and rdump interact with the control
terminal operator by posing questions requiring
yes or
no answers when it can no longer proceed or if
something is grossly wrong.
Since making a full dump involves considerable time and effort,
dump and rdump each establish a check-
point at the start of each tape volume. If, for any reason, writing that volume fails,
dump and rdump
will, with operator permission, restart from the checkpoint after the old tape has been rewound and
removed and a new tape has been mounted.
dump and rdump periodically report information to the operator, including typically low estimates of the
number of blocks to write, the number of tapes it will require, the time needed for completion, and the
time remaining until tape change. The output is verbose to inform other users that the terminal control-
ling dump and rdump is busy and will be for some time.
Access Control Lists (ACLs)
The optional entries of a file’s access control list (ACL) are not backed up with
dump and rdump.
Instead, the file’s permission bits are backed up and any information contained in its optional ACL entries
is lost (see acl(5)).
EXAMPLES
In the following example, assume that the file system
/mnt is to be attached to the file tree at the root
directory, (/). This example causes the entire file system (/mnt) to be dumped on
/dev/rmt/c0t0d0BEST
and specifies that the density of the tape is 6250 BPI.
/usr/sbin/dump 0df 6250 /dev/rmt/c0t0d0BEST /mnt
WARNINGS
dump will not backup a file system containing large files.
Tapes created from file systems containing files with UID/GIDs greater than 60,000 will have a new magic
number in the header to prevent older versions of restore (1M) from incorrectly restoring ownerships for
these files.
AUTHOR
dump and rdump were developed by the University of California, Berkeley.
FILES
/dev/rdsk/c0d0s0 Default file system to dump from.
/dev/rmt/0m Default tape unit to dump to.
/var/adm/dumpdates New format-dump-date record.
/etc/fstab Dump table: file systems and frequency.
/etc/group Used to find group operator.
SEE ALSO
restore(1M), rmt(1M), fstab(4), acl(5).
HP-UX 11i Version 2: August 2003 − 2 − Hewlett-Packard Company Section 1M−−153