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12-14 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
The argument for the
f
option is
rst0a
(the tape file name), and the argument for
the
b
option is
63
(blocking factor). The
rst0a
and
63
arguments must be listed in
the same order as the
f
and
b
options.
3DWK
The path name is
/vol/vol0/
, which means that all files and directories in the
vol0
vol-
ume are backed up to tape.
NOTE: The
dump
command consists of more options than those described in this
section. All options are described in greater detail in the next section.
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Table 12-1 describes the meanings of the
dump
command options.
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Dump
level
It is mandatory. It can be a number from 0 to 9. Level 0 is a full
backup; levels 1 through 9 are for incremental backups.
A
The
dump
command does not back up Windows NT ACLs.
b
It is the blocking factor. It takes a number as an argument, which is
the number of 1-KB blocks in each write.
If you use a local tape drive for backup, the number should be from
4 to 64. If you use a remote tape device for backup, the number
must be from 4 to 256. The
dump
command generates an error
message if you specify a number that is out of range for your tape
drive. The default argument is 63.
B
It takes a number as an argument, which is the number of tape
blocks in a tape file. The
dump
command writes the specified
number of tape blocks to a tape file before starting a new tape file.
The argument must be equal to or larger than the argument to the
b
option. If you do not specify this option, the
dump
command
writes data until it reaches the end of tape.
f
It is mandatory. It takes the tape file name as an argument. You
can specify a comma-separated list of tape file names.
l
It backs up only specific files and directories in the dump path. It
must be used with the
n
option.
n
It takes a string as an argument, which is the name of the backup
to be recorded in the
/etc/dumpdates
file. It is required if you use
the
l
option.