Max OS X kernel driver for providing access to external drive SMART data
C++ C Objective-C Other



This is a kernel driver for Mac OS X external USB or FireWire drives.
It extends the standard driver behaviour by providing access to drive
SMART data. The interface to SMART data is same as with ATA family
driver, so most existing applications should work. 

The driver requires a SAT (SCSI ATA Translation) capable external
drive enclosure. Check smartmontools list for supported devices: 
If the Option column contains sat or jmicron, the driver should work.
The driver should work with Snow Leopard and Lion and Mountain Lion. 
People have reported problems with Lion and Encrypted volumes. 
Some enclosures are reported to work with FireWire but not with USB.
The driver is not compatible to WD Drive Manager, or enclosures 
with custom kernel extensions.

Note for Yosemite (Mac OS X 10.10) users:
Try first version 0.8. If it works for you, then just use it.
If not or you want to try newer version or participate on development, 
then you must allow unsigned kernel extensions with command:
  sudo nvram boot-args="kext-dev-mode=1"

The code is based on Apple opensource files and is therefore published
under Apple Public Source License. For details see

 * Unmount external drives
 * Use the dmg image and the installer
 * Check DiskUtility. The disks should have "S.M.A.R.T. Status: Verified"


 * Remove driver and plugin
    sudo rm -r /System/Library/Extensions/SATSMARTDriver.kext
    sudo rm -r /System/Library/Extensions/SATSMARTLib.plugin
 * Reboot

Adding enclosure identification

Check, if the enclosure is identified using shell:

ioreg -r -w 0 -c fi_dungeon_driver_IOSATDriver  | egrep 'Enclosure|PassThroughMode|Capable'|grep -v Identifiers
  |   "Enclosure Name" = "Unknown 0928:000a"
  |   "SATSMARTCapable" = Yes
  |   "PassThroughMode" = "sat16"

If not, try adding the info to /System/Library/Extensions/SATSMARTDriver.kext/Contents/Info.plist . Note that hex numbers must be converted to decimal.

<key>Macally G-S350SU</key>

Unmount all drives and reload the driver:

sudo kextunload -v -b fi.dungeon.driver.SATSMARTDriver
sudo kextutil -t /System/Library/Extensions/SATSMARTDriver.kext


 * Compile all targets
    make package

 * Unmount all existing external drives.

 * Load the kernel extension.
    sudo tail -f /private/var/log/kernel.log &
    sudo make install

 * The external drives should mount automatically.

 * Test
    cd SATSMARTDriver/build/Debug/
    ./smart_sample -a

 * Check DiskUtility. The disk should have "S.M.A.R.T. Status: Verified"

 * Install the driver to system permanently
    sudo make realinstall

 * Reboot

 * If you want to limit the driver for certain hardware add product 
   and vendor identification to SATSMARTDriver/Info.plist.
   Check chapter "Adding enclosure identification"