LG Multi DVD Rewriter GSA-H20LB, 2 MB, 22 MB/s, 48x, 32x, 4x, 8x LG Multi DVD Rewriter GSA-H20LB. Drive device, buffer size: 2 MB, DVD-ROM transfer rate (sustained mode): 22 MB/s. CD write speed: 48x, CD rewrite speed: 32x, DVD-R Double Layer write speed: 4x. CD read speed: 48x. Weight: 770 g. Dimensions (WxDxH): 146 x 170 x 41.3 mm, DVD-RW speed: 6x, DVD+R speed: 16x