Sony VGN-AR170GU1 - Manual (Page 39)

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Using Your VAIO Computer
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Supports writing data to DVD-RW discs compliant with DVD-RW version 1.1/1.2.
Supports writing data to DVD-R discs compliant with DVD-R for General version 2.0/2.1.
Supports 8cm disc reading, but does not support 8cm disc writing.
Writing data to DVD+R DL (Double Layer) discs is available only on discs supporting DVD+R DL (Double Layer) recording.
Writing data to DVD-R DL (Dual Layer) discs is available only on discs supporting DVD-R DL (Dual Layer) recording.
The DVD±RW/RAM disc drive on your computer does not support the DVD-RAM cartridge. Use non-cartridge discs or discs with removable cartridge.
Writing data to single-sided DVD-RAM discs (2.6 GB) compliant with DVD-RAM version 1.0 is not supported.
Supports writing data to BD-R 1.1 discs (single-layer discs with the capacity of 25 GB, dual-layer discs with the capacity of 50 GB) and BD-RE 2.1 discs
(single-layer discs with the capacity of 25 GB, dual-layer discs with the capacity of 50 GB). The Blu-ray drive on your computer does not support BD-
RE 1.0 discs and Blu-ray cartridge discs.
Writing data to Ultra Speed CD-RW discs is not supported.
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You may need to connect to the Internet when playing copyright protected Blu-ray discs.
As with other optical media devices, circumstances may limit compatibility or prevent Blu-ray disc playback. VAIO computers may not support movie
playback on packaged media recorded in AVC or VC1 formats at high bit rates.
Video recording to Blu-ray Disc media is done in MPEG2 format only.
Region settings are required for Movies and BD-ROM contents. If the region setting and the region of the disc do not match, playback is not possible.