Early 2009 (3,1) optical disc drive issues

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

  1. howardc64 macrumors newbie

    Joined:
    Mar 14, 2011
    #1
    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 G4

    Joined:
    Feb 20, 2009
    #2
    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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