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Using Backup Options
Chapter 5 247
Report Open Locked Files As (Windows-Specific Option)
This option sets the report level for files that are opened and locked at
the time Data Protector attempts to back them up. Data Protector
reports such files as per the regard to the Report Level setting. The
default value is Warning.
Software Compression
Data Protector can compress data on a Disk Agent client before sending
it to a Media Agent client. This feature is also known as software
compression. Select Software compression in the Other property page
of the Object Properties window to enable software compression. In
this way, you reduce traffic over the network, as well as number of media
needed and thus improve overall backup performance. Depending on the
data type, compression ranges from 30% to 70% and is based on the
Lempel-Ziv 4.3 compression algorithm, which is compatible with the
standard UNIX compress utility. The progress indication on the monitor
is not accurate if this option is used.
The default value is OFF.
NOTE Most modern backup devices provide built-in hardware compression that
can be set when you create a device file or SCSI address in the device
configuration procedure. Do not use software and hardware compression
at the same time, since double compression decreases performance
without giving better compression results. See HP OpenView Storage
Data Protector Installation and Licensing Guide for details on how to
enable hardware compression.
HP Ultrium LTO devices do not let you disable automatic hardware
compression. Keep the default software compression value (OFF) when
you configure an HP Ultrium LTO drive with Data Protector.
Uncompress NetWare Compressed Files (Novell Netware Specific)
By default, Data Protector backs up Novell NetWare compressed files in
their compressed format. Though this approach speeds up the backup
process, it makes it impossible to restore the Novell NetWare compressed
files to any non-NetWare platforms. When this option is selected, Novell
NetWare compressed files are uncompressed before being backed up.
Files backed up in this form can be restored to non-NetWare platforms.