The Sony DRU840A Internal DVD-ROM Drive is capable of burning DVD+R discs at a maximum speed of 20X in about 5 minutes. It can efficiently store up to 4 hours of MPEG-2 video on a single side of a double/dual-layer disc. The Sony DRU840A Internal Dual-layer CD RW Drive supports various media and modes including, DVD-R, DVD+R, DVD+RW, CD extra, video CD, photo CD, CD-DA, and more. Uninterrupted data transfer at high speed is ensured with the drive’s ATAPI/EIDE interface. The Sony DRU840A Internal DVD-ROM Drive requires an average access time of about 130 milliseconds to retrieve data. The Windows Vista, Windows XP, and Windows 2000 are the different operating systems that are compatible with the Sony DRU840A Drive.