smartctl 6.3 2014-07-26 r3976 [x86_64-apple-darwin13.3.0] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

Usage: smartctl [options] device

============================================ SHOW INFORMATION OPTIONS =====

  -h, --help, --usage
         Display this help and exit

  -V, --version, --copyright, --license
         Print license, copyright, and version information and exit

  -i, --info
         Show identity information for device

  --identify[=[w][nvb]]
         Show words and bits from IDENTIFY DEVICE data                (ATA)

  -g NAME, --get=NAME
        Get device setting: all, aam, apm, lookahead, security, wcache, rcache, wcreorder

  -a, --all
         Show all SMART information for device

  -x, --xall
         Show all information for device

  --scan
         Scan for devices

  --scan-open
         Scan for devices and try to open each device

================================== SMARTCTL RUN-TIME BEHAVIOR OPTIONS =====

  -q TYPE, --quietmode=TYPE                                           (ATA)
         Set smartctl quiet mode to one of: errorsonly, silent, noserial

  -d TYPE, --device=TYPE
         Specify device type to one of: ata, scsi, sat[,auto][,N][+TYPE], usbcypress[,X], usbjmicron[,p][,x][,N], usbsunplus, auto, test

  -T TYPE, --tolerance=TYPE                                           (ATA)
         Tolerance: normal, conservative, permissive, verypermissive

  -b TYPE, --badsum=TYPE                                              (ATA)
         Set action on bad checksum to one of: warn, exit, ignore

  -r TYPE, --report=TYPE
         Report transactions (see man page)

  -n MODE, --nocheck=MODE                                             (ATA)
         No check if: never, sleep, standby, idle (see man page)

============================== DEVICE FEATURE ENABLE/DISABLE COMMANDS =====

  -s VALUE, --smart=VALUE
        Enable/disable SMART on device (on/off)

  -o VALUE, --offlineauto=VALUE                                       (ATA)
        Enable/disable automatic offline testing on device (on/off)

  -S VALUE, --saveauto=VALUE                                          (ATA)
        Enable/disable Attribute autosave on device (on/off)

  -s NAME[,VALUE], --set=NAME[,VALUE]
        Enable/disable/change device setting: aam,[N|off], apm,[N|off],
        lookahead,[on|off], security-freeze, standby,[N|off|now],
        wcache,[on|off], rcache,[on|off], wcreorder,[on|off]

======================================= READ AND DISPLAY DATA OPTIONS =====

  -H, --health
        Show device SMART health status

  -c, --capabilities                                                  (ATA)
        Show device SMART capabilities

  -A, --attributes
        Show device SMART vendor-specific Attributes and values

  -f FORMAT, --format=FORMAT                                          (ATA)
        Set output format for attributes: old, brief, hex[,id|val]

  -l TYPE, --log=TYPE
        Show device log. TYPE: error, selftest, selective, directory[,g|s],
                               xerror[,N][,error], xselftest[,N][,selftest],
                               background, sasphy[,reset], sataphy[,reset],
                               scttemp[sts,hist], scttempint,N[,p],
                               scterc[,N,M], devstat[,N], ssd,
                               gplog,N[,RANGE], smartlog,N[,RANGE]

  -v N,OPTION , --vendorattribute=N,OPTION                            (ATA)
        Set display OPTION for vendor Attribute N (see man page)

  -F TYPE, --firmwarebug=TYPE                                         (ATA)
        Use firmware bug workaround:
        none, nologdir, samsung, samsung2, samsung3, xerrorlba, swapid

  -P TYPE, --presets=TYPE                                             (ATA)
        Drive-specific presets: use, ignore, show, showall

  -B [+]FILE, --drivedb=[+]FILE                                       (ATA)
        Read and replace [add] drive database from FILE
        [default is +/usr/local/etc/smart_drivedb.h
         and then    /usr/local/Cellar/smartmontools/6.3/share/smartmontools/drivedb.h]

============================================ DEVICE SELF-TEST OPTIONS =====

  -t TEST, --test=TEST
        Run test. TEST: offline, short, long, conveyance, force, vendor,N,
                        select,M-N, pending,N, afterselect,[on|off]

  -C, --captive
        Do test in captive mode (along with -t)

  -X, --abort
        Abort any non-captive test on device

=================================================== SMARTCTL EXAMPLES =====

  smartctl -a disk0                            (Prints all SMART information)

  smartctl -t long /dev/disk0              (Executes extended disk self-test)

  smartctl --smart=on --saveauto=on /dev/rdisk0 (Enables SMART on first disk)

  smartctl --attributes --log=selftest --quietmode=errorsonly /dev/disk0
                                        (Prints Self-Test & Attribute errors)

  smartctl -a IOService:/MacRISC2PE/pci@f4000000/AppleMacRiscPCI/ata-6@D/AppleKauaiATA/ATADeviceNub@0/IOATABlockStorageDriver/IOATABlockStorageDevice
                                                 (You can use IOService: ...)

  smartctl -c IODeviceTree:/pci@f4000000/ata-6@D/@0:0
                                                       (... Or IODeviceTree:)