How can I programatically read the SD Card's CID register, which contains a Serial Number and other information? Can I do it through Android Java, or Native code? Re-write the number, separating the numbers into pairs. For example, if the number is 5224656B then you would write “52 24 65 6B.” Put the number into reverse format to get the SD card ID. So, “52 24 65 6B” would be “6B652452.” This final number is the SD card ID. Is it possible to get my windows 8 serial number by using command prompt? Before you try to tell me to go download this or that. I cannot get anything too boot including windows the only thing my computer is recognizing is my recovery disks which don't work but I have a solution if I can get my windows 8 serial number. Before you say, hey just look on your product, or call support they'll be able to pull it up. Already tried that. No tag on the case, support doesn't do that since 'windows serials are imprinted in the system so we cannot retrieve it'. Or give me a command to use to wipe this hard drive clean using the command prompt that is only accessible inside the the windows boot drive that only allows me to use Shift + F10 cause there is an Error screen after bios. FDISK does not work. Erase only erases non system files, Format, only can format other hard drives that my windows installation is not on. No i cannot access another DVD drive and no i cannot get access to another hard drive. If you get through this and think you can help me. I really appreciate you taking the time to help. 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. 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. 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?
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