12-4 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
filer. If you want to back up the filer to a tape drive attached to a SunOS or
Solaris computer, include the filer in the /.rhosts file on the computer.
The filer can resolve the name of the computer to which the tape drive is
attached using the information about the computer in the filers /etc/hosts
file or in the DNS database.
Standard output, provided that you enter the dump command through rsh.
Because the console is not a standard output device, you cannot write to stan-
dard output if you enter the dump command on the console.
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You can specify the level of backup in a dump command (dump level), which ranges
from level 0 to level 9. A level 0 backup is a full backup: It writes all data in the dump
path to the backup media. Backups at dump level ranging from level 1 to level 9 are
incremental backups. In an incremental backup, only files changed since the previous
level are written to the backup media.
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You can enter the dump command through the console or through rsh.
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Entering the dump command through rsh gives you these benefits:
When the dump command is in progress, you can still use the console to man-
age the filer. If the dump command entered on the console is backing up a large
number of files, you cannot use the console for a long time.
You can start multiple dump commands through rsh.
It is less likely to inadvertently terminate the dump command. If you enter a
dump command on the console, it could be terminated by a Ctrl-C entered on a
host connected to the filer using telnet.
You can automate filer backups through shell scripts.
You can write data to standard output.
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If you enter the dump command on the console, you can read and respond to screen
messages displayed by the command. For example, the command might prompt you
for another tape to complete the backup. A dump command entered through rsh
terminates and does not generate any messages when the command needs user
intervention.