iMac hard drive sleep

  • Posted: 01 December 2012 07:33 PM

    Should I choose to put my imac hard disks to sleep when possible in the Energy Saver section of System Preferences? If I do then Time Machine on my MacBook Air cannot backup to the external hard drive attached to the imac. But if I do not ever put my hard drive to sleep am I hurting the drive, limiting lifespan?
    Please advise.