Hi,
Compression type Select one of the following:
* None. Select this option to copy the data to the media in its
original form (uncompressed). Using some form of data
compression can help expedite backups and preserve storage media space. Hardware data compression should not be used in environments where devices that support hardware compression are used interchangeably with devices that do not have that functionality.
For example, if a drive that does not support hardware
compression is added to a cascaded drive pool that includes drives supporting the feature, hardware compression is automatically disabled. You can manually re-enable hardware compression on the drives that support it, but this results in media inconsistency. If the drive that supports hardware compression fails, the compressed media cannot be restored with the non-compression drive.
* Software. Select this option to use STAC software data
compression, which compresses the data before it is sent to the storage device.
* Hardware . Select this option to use hardware data compression (if the storage device supports it). If the drive does not feature data compression the data is backed up uncompressed.
* Hardware . Select this option to use hardware data compression (if the storage device supports it). If the drive does not feature hardware data compression, STAC software compression is used.
You can also refer to the Administartor's Guide :page number 119 onwards
VERITAS Backup Exec (tm) 10.0 for Windows Servers Administrator's Guide (English)
http://seer.support.veritas.com/docs/269777.htm
Thank you.
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