I have dozens of SD cards that I need to keep track of for a project. Right now, they each have a number physically written with permanent marker on the outside. This is OK, but I want to see if there is something unique that's built into each SD card that I can record. So far I am aware of: • The SD card's CID, which usually (not always???) includes an unique serial number. Remove and reinsert SD card to check new CID. However cid keeps always the initial one. In SM-T561 the compiled binary file to android is in. I can't find a straightforward way to read this off an SD card in Fedora 21. Some pages say that unless you have a card reader directly connected to the PCI bus (and not via USB), you can't see the CID. • Volume/partition serial number. This might work but I understand that this changes every time the card is reformatted, which is something we do from time to time. So not a good option. • Just labelling the SD card volume with my own unique naming system. This is too easy to change, and I might as well just stick with writing the numbers on the outside. Read Cid![]() So, I guess my questions are: • Is there a way to reliable read the CID off my SD cards to get serial numbers via a USB card reader in Fedora 21 or other GNU/Linux distributions? • If not, are there other ways of using existing unique identifiers in an SD card or another system for uniquely identifying SD cards? Whatever blkid returns will change whenever the data stored on the SD-card changes. This is much different to the CID or serial number. If you made a dd if=/dev/sdcard1 of=/dev/sdcard2 count=2, changes are very hight that blkid /dev/sdcard1 will be identical to blkid /dev/sdcard2. Also the final remark of the answer is misleading: the UUID is derived from the data stored on the SD card, and not the card, clearly most every USB reader will let you read the content of th SD-card. ![]() Sd Card Code 10What is still not possible is to access the CID. Microsoft visio free trial online. – Mar 8 '17 at 14:00.
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