Samsung TS-E552U DVD Writer Ext Black Ret. CD write speed: 40 x, CD rewrite speed: 32 x. CD read speed: 48 x. DVD drive average random access time: 130 ms, Access time: 100 ms. Drive device, buffer size: 2 MB, Interface: EIDE (ATAPI), USB 2.0. DVD-ROM transfer rate (sustained mode): 21.6 MB/s