获取USB HDD的序列号（Mac OS）

Question

i've already searched stackoverflow.com and google for an answer but couldn't find anything.

I've got the bsdName of a partition (disk1s1) which belongs to an external USB HDD (disk1).

I need to find out the serial number of that external HDD. I already tried the following (look for a service with the bsd Name):

io_service_t io_service = IOServiceGetMatchingService(kIOMasterPortDefault,IOBSDNameMatching(kIOMasterPortDefault, 0, [@"disk1" cStringUsingEncoding:NSUTF8StringEncoding]));

The Problem with that is: The service type returned is IOMedia which has no field USB Serial Number . I end up with the same problem if i use DiskArbitration framework (which is an abstraktion for IOMedia )

So i tried the other way around: Get all IOUSBDevice services iterate over them and just look for the bsdName or partitions on that IOUSBDevice . Unfortunately, there is no information stored about any partitions or bsd names in IOUSBDevice .

Can anybody help me with this problem?

Further information:

• XCode 4.3.2
• Mac OS X Lion (10.7.3)

EDIT: Here is the interesting part of the output if i iterate over all IOUSBDevice or AppleUSBEHCI io_services :

Child props: {
"Bus Power Available" = 250;
"Device Speed" = 2;
IOCFPlugInTypes =     {
    "9dc7b780-9ec0-11d4-a54f-000a27052861" = "IOUSBFamily.kext/Contents/PlugIns/IOUSBLib.bundle";
};
IOGeneralInterest = "IOCommand is not serializable";
IOUserClientClass = IOUSBDeviceUserClientV2;
"Low Power Displayed" = 0;
PortNum = 3;
"Requested Power" = 250;
"USB Address" = 6;
"USB Product Name" = "Mass Storage Device";
"USB Serial Number" = 09021000000000003740385375;
"USB Vendor Name" = JetFlash;
bDeviceClass = 0;
bDeviceProtocol = 0;
bDeviceSubClass = 0;
bMaxPacketSize0 = 64;
bNumConfigurations = 1;
bcdDevice = 2560;
iManufacturer = 1;
iProduct = 2;
iSerialNumber = 3;
idProduct = 4096;
idVendor = 34148;
kHasMSCInterface = 1;
locationID = "-99418112";
sessionID = 209792844564562;
uid = "USB:85641000003740385375";

}

As you can see, i get the serial number but i have no possibility to tell which bsd name this device has.

Answer 1

I have a tutorial on how to do this in c++. Given an io_service_t, that's the usbDevice in the code snippet below, you get the bsdName like this:

     bsdName = ( CFStringRef ) IORegistryEntrySearchCFProperty( 
        usbDevice,
        kIOServicePlane,
        CFSTR( kIOBSDNameKey ),
        kCFAllocatorDefault,
        kIORegistryIterateRecursively )

This is code to get the serial number off of USB Flash disks in C++, but it can probably be adapted to your purposes:

http://oroboro.com/usb-serial-number-osx/