All SONY ATAPI CD-ROM Drives do not operate correctly with a CD-ROM Performance Test Program (CDT.EXE). SONY device driver2.26a returns the error against IOCTL input command (Audio Disc Info) which is issued at the start of this test program CDT.EXE.
Device driver 2.27a is changed not to return the error against the first IOCTL input command (Audio Disc Info) after media is changed.
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