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I purchased a couple of used Intel 320-series 160 GB SSDs. I attached one of the drives to my MacBook Pro running OS X 10.8 using a SATA III to USB 3.1 cable.

When I attempted to view the drive statistics, it resulted in S.M.A.R.T. Status: Not Supported.

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I'm fairly certain S.M.A.R.T. Status: Not Supported is wrong. According to Intel Solid-State Drive 320 Series, S.M.A.R.T. is supported. From the document (section 5.4):

The Intel SSD 320 Series supports the SMART command set, which consists of:

  • SMART READ DATA
  • SMART READ ATTRIBUTE THRESHOLDS
  • SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE
  • SMART SAVE ATTRIBUTE VALUES
  • SMART EXECUTE OFF-LINE IMMEDIATE
  • SMART READ LOG SECTOR
  • SMART WRITE LOG SECTOR
  • SMART ENABLE OPERATIONS
  • SMART DISABLE OPERATIONS
  • SMART RETURN STATUS
  • SMART ENABLE/DISABLE AUTOMATIC OFFLINE

How do I display the S.M.A.R.T. statistics for the SSD under OSX 10.8?

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Getting the SMART status is possible with these disks but not if they are attached to USB. The necessary ATA commands usually aren't propagated through the USB-controller.

You can try to get that working though by using OS X SAT SMART Driver.

  • Thanks klanomath. I prefer not to use a third party driver. Does Apple offer a command line tool to do it? Do you know if there are any Apple RARDARs covering Disk Utility and SMART drives? I'm interested in Apple-approved methods, and I'm having a heck of a time searching for it. – user83961 Feb 22 '16 at 6:02

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