If the drive is exFAT, you can use this: % sudo newfs_exfat -N disk3s1 | grep Volume Serial Mac drive 8 serial number serial numbers#The article Get FAT Drive Serial Numbers in Unix has a good walk-through & explanation with a CLI for fetching a VSN from several FAT variants. This should be your intention too, as a user, to fully evaluate. Mac drive 8 serial number software#Our intentions are not to harm serial software company but to give the possibility to those who can not pay for any piece of software out there. Mac drive 8 serial number serial number#This release was created for you, eager to use serial number full and without limitations. The Python FAT Reader project may be useful for extracting VSNs from FAT volumes, but it seems to use dd which will (inconveniently) require the volume be unmounted. The serial number for serial is available. The uuid.py library may be useful generating UUIDs (perhaps for use in Windows?) Using macOS' diskutil piped through grep with a regular expression will output the 128-bit UUID: % diskutil info "$DEVNM" | grep "Volume UUID:" | grep -o '*-*-*-*-*' Step 1: Get the device name % DEVNM=`diskutil list | grep FAT | grep -o "disks"` However, given that there doesn't seem to be any readily available tools for macOS to easily extract the VSN ( vol for macOS :), you may wish to consider an alternative: If you see a window like this, double-click the version number beneath OS X to show the serial number: In System Information. You've indicated your preference for the VSN in your question, and that may be "unique enough" for your application. Intuitively, it seems that the 128-bit UUID is much more likely to be "unique" than the VSN. For FAT volumes then, there are two methods for creating a "unique" identifier. However, macOS (specifically the diskutil tool) uses a "true" 128-bit UUID for FAT volumes. this seems to be the case with the lsblk utility widely used in most Linux/Unix systems. Interestingly, it's said that Microsoft & IBM created the VSN to keep up with an early innovation by Apple!Īs you've suggested, it seems that the the label UUID is used in some systems instead of VSN - e.g. This Wikipedia article indicates the FAT VSN is based on the RTC in the system used to create or format the disk. There may be a way to format the output of the dd command with hexdump to avoid the rest of the compound command, however, I didn't want to take the time to figure it out and chose to use parameter expansion and shell arithmetic instead for the final formatting. Interesting Reading: Volume Serial Numbers With FAT32 volumes, the Volume Serial Number is stored in the Boot Sector at offset 67 ( 0x43), and is four bytes long. I confirmed this with the vol command in Windows and the blkid command in Linux, and the output of vol and blkid matched the output of the example compound command above. For a FAT32 formatted disk, in Terminal, the following example compound command will output its volume serial number: var="$(sudo dd if=/dev/diskNs1 skip=67 bs=1 count=4 2>/dev/null | hexdump -e '4/4 "%X"')" echo "$"įor my test disk, a USB flash drive formatted FAT32, the output was: 18E4-4FA7
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