ODD = Optirac AD-5670S with newest firmware (2AHI) EFI = most updated (MM31.0081.B06) Drive would start spinning at low speed briefly and stop for 4-5 cycles and often eventually spin up to high speed and mount. Some times it ejects after failing to mount at high speed spin. CDs may have fewer spin+stop cycles (3-4?) compared to DVD/DVDRs. Already opened up the drive (This mini lived in a dusty place, had a coat of yellow dust everywhere inside the chassis) and cleaned the laser objective lens. No change. Was wondering if anyone knows why there is spin start+stop cycles prior to mounting. Does the drive firmware do things like successively change read lens alignment on each cycle or increase the laser power?