12-10 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
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You must meet these prerequisites for the dump command to run successfully:
You must have enough tape space for the backup. Refer to Determining the
Number of Tapes for the Backup to determine the number of tapes required for
the backup.
The tape drive is available. That is, it is not currently used for data backup or
recovery.
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The tape drive must be included in the /etc/cloned_tapes file.
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These are the prerequisites for backing up data to a tape drive attached to a remote
host:
You must know the maximum blocking factor supported by the remote host to
which data is backed up. Some computers allow a blocking factor greater than
the default used by the dump command (63). Make sure that the blocking factor
you specify in the dump command does not exceed the maximum blocking fac-
tor supported by the remote host.
If you use a blocking factor greater than 63, you must know the maximum block-
ing factor supported by the system that you plan to use for restoring the data. If
the maximum blocking factor is 63 on the system for restoring data, that system
cannot restore data from a tape file created with a blocking factor greater
than 63.
You must know the maximum tape file size supported by the remote host to
which data is backed up. For example, some UNIX systems do not support tape
files larger than 2 GB. In the dump command, you need to specify the tape file
size appropriate to your remote host.
If you use a tape file size larger than 2 GB, you must know the maximum tape file
size supported by the system that you plan to use for restoring the data. If the
maximum tape file size is 2 GB on the system for restoring data, that system
might not be able to restore data from a tape file greater than 2 GB.
The remote host must support the rmt protocol.
The filer being backed up must have a trusting relationship with the remote host.