HP-UX Reference (11i v2 03/08) - 1M System Administration Commands N-Z (vol 4)

v
vxdump(1M) vxdump(1M)
specify a tape device on a remote machine.
-n Whenever vxdump requires operator attention, notify all users in group
operator by
means similar to that described by wall(1M).
-o Use /etc/vxdumpdates
rather than /etc/dumpdates
for timestamp information.
-s size size is the size of the dump tape, specified in feet. When the specified size is reached,
vxdump waits for reels to be changed. If
-d is specified, a default size value of 2300 is
assumed for a reel tape.
-T date Use the specified date as the starting time for the dump instead of the time determined
from looking in the timestamp file. The format of date is the same as that of ctime(3C)
This option is useful for automated dump scripts that wish to dump over a specific period
of time.
• You can specify
-T
only for incremental dumps; using -T for a level 0 dump returns
an error.
•
-T is mutually exclusive with the
-u option.
• If you enter an improperly formatted date,
-T returns an error message and ter-
minates the dump.
-u If the dump completes successfully, write in the timestamp file the date when the dump
started. This file records a separate date for each file system and each dump level. The
format of the timestamp file is user-readable and consists of one free-format record per
line: file system name, increment level and dump date in ctime(3C) format. The times-
tamp file can be edited to change any of the fields if necessary. The
-u option is ignored
for partial dumps.
-W For each file system in the timestamp file print the most recent dump date and level,
indicating which file systems should be dumped. If
-W is specified, all other options are
ignored and vxdump exits immediately.
-w Operate like -W, but print only file systems that need to be dumped.
Operands
vxdump recognizes the following operand:
filename Name of the file that contains a list of all files in the
vxfs
filesystem to be copied to mag-
netic tape.
Operator Interaction
vxdump requires operator intervention for any of the following conditions:
• end of tape
• end of dump
• tape-write error
• tape-open error
• disk-read error (if errors exceed threshold of 32).
In addition to alerting all operators implied by the
-n option, vxdump interacts with the control termi-
nal operator by posing questions requiring yes or no answers when it can no longer proceed or if there is
a serious problem.
Because making a full dump typically requires considerable time,
vxdump establishes a checkpoint at
the start of each tape volume. If, for any reason, writing that volume fails, vxdump, with operator per-
mission, restarts from the checkpoint after the old tape is rewound and removed and a new tape is
mounted.
vxdump periodically reports information to the operator, including estimates (typically low) of the
number of blocks to write, the number of tapes it requires, time required to complete, and the time
remaining until tape change. The output is verbose to inform other users that the terminal controlling
vxdump is busy and will be for some time.
Compatibility
The dump tape format is independent of the VxFS disk layout. A dump of a file system with the Version 4
disk layout can be restored on a file system using the Version 2 disk layout or even a file system of
another file system type, with the following exceptions:
HP-UX 11i Version 2: August 2003 − 2 − Hewlett-Packard Company Section 1M−−889