HP z545 Software Reference Manual page 165

NOTE: The HP Digital Entertainment Center comes with
the Double-Layer DVD Writer. It supports single-layer and
double-layer DVD media. Double-layer technology gives
you greater capacity and allows you to store up to
8.5 GB* of data on double-layer DVD+R media.
Double-layer is a new technology. Double-layer media
compatibility will widely vary with some home DVD
players and DVD-ROM drives.
*GB is defined as 1 billion bytes. 1 GB = 1 billion bytes
when referring to hard disk drive capacity. Actual
formatted capacity is less.
For the latest disc compatibility information for your
HP Digital Entertainment Center, go to the HP Support
Web site at: http://www.hp.com/support
n
For the latest disc compatibility information,
check the HP Support Web site:
http://www.hp.com/support
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Double-layer DVD technology is supported by
select models only.
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The InterVideo WinDVD Creator
and RecordNow! recording programs support
the double-layer technology.
Creating (Burning) CDs and DVDs
155