HP B6960-90078 manual Configuring File Devices, What Are File, File size GB Segment size MB

Configuring and Using Backup Devices

Configuring File Devices

	Configuring File Devices
What Are File	A file device is a file in a specified directory to which you back up data
Devices?	instead of writing it to a tape. File devices are available for standalone
	devices and Jukebox devices simulation. The file device functionality is
	available on the Windows, HP-UX, Solaris, AIX, and Linux operating
	systems.
	The default capacity of a file device is 100 MB for data and 10 MB for the
	catalog. The default segment size (for a 100 MB file device) is 30 MB.
	The recommended segment sizes for specific file device sizes is:
Table 2-1	The Recommended Segment Sizes for Specific Device File Sizes
	File size (GB)	Segment size (MB)
	< 10	100
	< 100	500
	< 200	1000
	< 300	1500
	< 400	2000
	< 500	2500

Data Protector never measures the amount of free space on the filesystem; it takes either the default or the specified capacity as the file size limit. If the disk on which the file device resides runs out of space, the backup will fail. The largest capacity specified for a file is 500 GB on Windows and 4 GB on UNIX systems.

Data Protector does not support using compressed files for file devices. You can change the default file size by changing the FileMediumCapacity parameter in the <Data_Protector_home>\Config\Options\global file on the Windows Cell Manager or in the /etc/opt/omni/options/global file on the HP-UX or Solaris Cell Manager.

26 Chapter 2