Lenovo USB 2.0 CD-RW/DVD-ROM Combo II Drive - Manual (Page 44)

Read speeds
Media All power modes
DVD-ROM (single layer) 8X Max.
DVD-ROM (dual layer) 8X Max.
DVD-R (4.7 GB) 8X Max.
DVD-R DL (8.4 GB, no layer jump) 8X Max.
DVD-RW (4.7 GB) 8X Max.
DVD-video 4X Max.
DVD-RAM (4.7/9.4 GB) 5X Max.
DVD-RAM (2.6 GB) 2.5X Max.
DVD+R 8X Max.
DVD+R DL (8.4 GB, closed) 8X Max. (Not guaranteed)
DVD+R DL (8.4 GB, open) 4X Max. (Not guaranteed)
DVD+RW 8X Max.
CD-ROM 24X Max.
CD-R 24X Max.
CD-RW 24X Max.
CD-DA (DAE) 20X Max.
Write speeds
Media All power modes
CD-R 24X Max.
Multi-Speed CD-RW 4X Max.
High-Speed CD-RW 10X Max.
Ultra-Speed CD-RW 24X Max.
B-2 USB 2.0 CD-RW/DVD-ROM Combo II Drive: User ’s Guide