Early 2009 (3,1) optical disc drive issues

Discussion in 'Mac mini' started by howardc64, Jun 7, 2017.

  1. howardc64 macrumors newbie

    Mar 14, 2011
    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?
  2. Fishrrman macrumors G5


    Feb 20, 2009
    The drives just wear out after a while.
    Cheap and easy to just buy a USB external and plug it in.
    You'll need that external optical drive for the next Mac you buy, in any case!

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