#My mac serial number info how to

The USB device serial number follows the device and gives any host computer a way of uniquely identifying the device.

The device serial number is written into read only memory (ROM) of the device and cannot be changed by the user regardless of attempts to do so. The volume serial number is a 32-bit number determined by the date and time on the real-time clock on the current computer at the time of a disk’s formatting.Ī USB device serial number is a unique device number which can be a collection of alpha-numeric string of digits. For example, formatting a USB flash drive will change the volume serial number. The volume serial number is unique and (typically) not changed by the User, thus the volume serial number acts as a more consistent and reliable way to identify a device, especially if the volume label has been changed. With a NTFS file system the volume label can be up to 32 characters and can be either upper case and/or lower case letters when using letters (exFAT can also be upper and/or lower case when using letters). In a FAT and FAT32 file system the volume label can be only 11 characters long and all capital letters. So now we have the USB volume serial number and the USB device serial number what does this all mean? USB Serial Number DefinitionsĪ volume label is a name given to a specific device (or storage volume) in a file system. In this example the USB device serial number is 85Y112M1 The USB device serial number is found on row labeled USB and below the column “SerialNumber” you will see the USB device serial number. The command prompt window will return results and look something like this: To get the USB Device Serial Number do the following:ĭouble click the drive letter associated with the USB flash driveįrom the command prompt type: wmic diskdrive get Model, Name, InterfaceType, SerialNumber and click Enter

#My mac serial number info how to

The command prompt window will return the results and look something like this:Īfter we explain how to get the USB device serial number we will explain the difference between the two. There is no computer experienced needed to perform these functions, simply type a couple letters and you will get the information! To get the USB Volume Serial Number do the following:ĭouble click the drive letter associated with the USB flash drive (remember the drive letter as you will need this in a moment)įrom the command prompt type: vol d: and click Enter ( where “d” is the drive letter of the USB flash drive) Using the command prompt (cmd) you can quickly and easily get the USB volume serial number and the USB device serial number.