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hdparm “Get/set IDE 32-bit IO setting” returns “IO_support =-2130557184 (???)” error

I'm trying to debug my Macbook Air SSD but am getting IO_support errors. hdparm -c /dev/sda /dev/sda: IO_support =-2130557184 (???) hdparm -c0 /dev/sda /dev/sda: setting 32-bit IO_support ...