cd/dvd burner

[hippoassassin]

I bought the newest version of the imac yesterday, it is the second level of the 24" model. I have a two part question:
1.) is the superdrive inside dual layer writable
2.) if not do any of you know, or know where i could find out if the SONY DRX-840u (external burner) is dual layer writable

Thank You

 

[n459umb4786ers]

Here's the full specs of the Super Drive:
Optical drive

* Slot-loading 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
o Writes DVD+R DL and DVD-R DL discs at up to 4x speed
o Writes DVD-R and DVD+R discs at up to 8x speed
o Writes DVD-RW discs at up to 6x speed and DVD+RW discs at up to 8x speed
o Reads DVDs at up to 8x speed
o Writes CD-R discs at up to 24x speed
o Writes CD-RW discs at up to 16x speed
o Reads CDs at up to 24x speed

DL stands for Dual Layer. At least that's what it says on Wikipedia... On the specs page of every Mac it shows the specifications of the Super Drive.

I wonder why nobody bothered to answer this question?