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Using the dump command

Specifying the tape file size

Maximum tape file sizes  Top

In the dump command, you can specify the maximum size of the tape file in terms of tape blocks. For example, if you want the maximum tape file to be 2 GB, specify 2,097,151. This specifies that the largest tape file can contain 2,097,151 tape blocks, which are 1 kilobyte each. The tape file size must be equal to or greater than the blocking factor; otherwise, the dump process terminates.

When to specify the tape file size  Top

If you do a remote backup or plan to restore the backup on a system other than the filer, you might need to specify a tape file size. Some systems support tape files of a limited size; for example, some Solaris systems do not support tape files larger than 2 GB.

Specifying the tape file size  Top

To specify a tape file size, complete the following steps.

Step

Action

1

Include the B option in the dump command line.

2

Include the tape file size, in kilobytes, in the dump command as an argument to the B option. The size applies to all tape files in the backup.

Example

The following command backs up the /vol/vol0 volume using a tape file size of 2,097,151, so that a tape file is no larger than 2 GB:

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