Determining the amount of backup data

Description

Before you enter the dump command, you must determine the amount of backup data so that you can estimate the number of tape files and the number of tapes required for the backup.

The procedure for estimating the amount of data depends on whether the data is in a qtree.

Step for estimating the amount of data if you back up a qtree

Follow the step in this table to display the number of kilobytes used for the qtree.


Step	Action
1	Enter the `quota report` command.

Steps for estimating the amount of data if you back up data not in a qtree

The procedure for estimating the amount of backup data depends on whether the filer is mounted on an NFS client or is shared by a CIFS client.

If the filer is mounted on an NFS client

Follow these steps to determine the amount of backup data from an NFS client.


Step	Action
1	On the NFS client, change directory to the mount point.
2	Enter the following command for each directory you want to back up: du -s pathname ... Example If the NFS client mounts the filer to /toaster and you want to back up the /etc and /home directories, enter these commands: cd /toaster du -s etc home The command output shows the amount of space allocated for the directories. Refer to the documentation for your client system for interpreting the output because the output is written in different units (for example, 512-byte units or 1,024 units) depending on the operating system.

If the filer is shared by a CIFS client

Follow these steps to determine the amount of backup data from a CIFS client.


Step	Action
1	On the CIFS client, point to the shared file or directory that you want to back up.
2	Right-click to display the pull-down menu.
3	Click Properties to display the number of bytes used by the file or directory.