IBM 10K3799 User Manual page 23

DVD-RAM
Cache memory (Read/Write)
Disc diameter
Rotational speed
Mean time between failures (MTBF)
Type II Media 170 ms
512 KB
12 cm (4.7 in.) (8cm [3 in.] read-only)
5670 rpm
80,000 POH (duty 25%)
Appendix A. Product specifications
A-3