Result of CD-RW compatibility test in TWG2 (Technical Working Group2) CD-RW Compatibility Test Result TWG2 has been working on compatibility tests of recording and reproduction between CD-RW discs and CD-R/RW drives as well as between CD-ROM playback devices by taking up those commercially available. Since CD-RW is rewritable media, the test results as of now are summed up with attention paid not only recording speed, but also Over writing characteristics and Over writing by different manufacturer's drives. Step 3.5 Evaluation on recorded signal from combination of 1-4X CD-RW media and drives TEST HS1 Evaluation on recorded signal from combination of 4-10X CD-RW media and drives (Part1)