Best Practices for Creating Files System Devices

Use the following best practices to help ensure that you can successfully back up data to file system devices (FSDs).

You should avoid creating FSDs on critical system volumes. For example:
- Linux
```
"/", "/boot", "/tmp", "/usr"
```
- AIX
```
"/", "/usr", "/tmp"
```
- HP
```
"/", "/usr", "/stand", "/tmp"
```
This practice helps ensure that operating system performance is not adversely affected if the backup data consumes all the available free disk space on the FSD.
You should always create FSDs on stand-alone hard disks. This practice helps ensure that the backup data does not adversely affect system volumes, and helps to improve the overall performance of the hard disk.
You should verify that there is sufficient amount of free disk space to store the backup data on the hard disk before you submit the jobs. This practice helps ensure that the backup does not consume all the free disk space in the volume. If the FSD was created in a critical system volume, such as "/", this practice also helps ensure that the operating system does not stop responding when the FSD is full.