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.

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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.
AThe dump command does not back up Windows NT ACLs.
bIt 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.
BIt 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.
fIt is mandatory. It takes the tape file name as an argument. You
can specify a comma-separated list of tape file names.
lIt backs up only specific files and directories in the dump path. It
must be used with the n option.
nIt 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.