IBM 22P9176 - Manual (Page 48)

Read speeds
Media Read Speed AC/Aux Power USB Standard Bus Power
DVD-ROM (single layer) 8X Max. 4X Max.
DVD-ROM (dual layer) 4X Max. 4X Max.
DVD-R (4.7 GB) 4X Max. 4X Max.
DVD-RW (4.7 GB) 4X Max. 4X Max.
DVD-video 4X Max. 4X Max.
DVD-RAM (4.7/9.4 GB) 2X Max. N/A
DVD-RAM (2.6 GB) 1X Max. N/A
DVD+R 4X Max. 4X Max.
DVD+RW 4X Max. 4X Max.
CD-ROM 24X Max. 10X Max.
CD-R 24x Max. 10X Max.
CD-RW 16X Max. 10X Max.
CD-DA (DAE) 8X 4X
Write speeds
Media Write speeds AC/AUX Power
DVD-R (for general, 650 nm) 2X
DVD-RW (Version 1.1) 1X
DVD-RAM (Version 2.1, 4.7/9.4 GB) 2X Max.
CD-R 16X Max.
CD-RW 10X
A-2 IBM USB 2.0 Portable Multi-Burner: User’s Guide