Why do CoreStorage external drives stay active after eject?

Discussion in 'OS X Yosemite (10.10)' started by benguild, Dec 15, 2014.

  1. benguild macrumors 6502a

    Jul 29, 2003
    I've noticed that USB drives that are configured with CoreStorage can often still seem like they're writing data or spinning to various areas of the drive for a few minutes even after the volume is ejected and removed from the Desktop.

    It doesn't seem that safe to disconnect them, but I may be wrong.

    Does anyone know what's actually happening and if it's OK to remove them?
  2. grahamperrin macrumors 601


    Jun 8, 2007
    Mysteries of Core Storage

    Not me. Closed source Core Storage is too mysterious.

    If none of the volumes associated with the physical drive are mounted: yes.

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