Change Sd Card Serial Number
Nov 17, 2016 - To summarize: I want a way to copy SD cards and give them each a hard-coded. In the image, and use a stream editor (sed might work) to modify the key value in the image. SD cards already have their own serial number.
Serial number of SD card
Change Sd Card Volume Serial Number
I can't seem to find a way to find the serial number of my SD card. I've looked in /dev/disk/by-uuid, but the same uuid is used across multiple Pis that I have. I've also used the blkid command, but I can only seem to get the size of the SD card. Any help would be appreciated.
Sd Card Walmart
Edit: I managed to figure out where the 'serial number', aka CID, is found. For anyone who's interested, it's located in /sys/block/mmcblk0/device/cid. The CID contains info on when the card was manufactured, by whom and what its intended content is. For more information on the SD card standard check this out. I plan on using the CID to encrypt the files on the SD card so no one can take my card out and simply copy what's on it.
Change Pc Serial Number
Buying flash memory from poorly reputed places, such as Chinese computer markets, and online auction sites is an often known way to collect BAD flash memory cards that fall short on performance, longevity and data security. SD cards, along with their “counterparts” mini and microSD cards, all contain manufacturer defined information in a set of registers. One is known as the CID, short for Card Identification Register. There is also another called the CSD or Card Specific Data Register. These can only be accessed directly via hardware and not via most card readers. I am aware that it was possible to do this via the SD Card Shield and Arduino, but since I have a Chromebook, things got really easy. Under the Chromebook, the SD reader slot on the side is directly connected to the SD bus of the ARM CPU and is not a USB based reader. By running Chrubuntu, getting the CID or CSD data from a card is as simple as:
Et voila! You will be rewarded with a hexadecimal string with the data in it. By comparing some cards that you own with the known signatures, you can have some reassurance whether your cards are similar, or genuine. Unfortunately, I haven’t seen a large CID database online, nor have I seen a CID decoder that will decode the hex string into the component parts (some BCD, some ASCII, others Unsigned Int or best as Hex), so I went on a journey to code one up for CID. I used this reference by Sandisk for the data field lengths and types. The CIDs for the cards I have in my possession that are in reach are as follows:
Please note, while the code below works using the Javascript of your browser, I have no prior Javascript coding until today, with much help from Google searches and W3schools. I won’t warrant the below decoder as being bug free, but it’s free so give it a whirl! If you want a full-screen one, so you can use it side-by-side and compare two separate CIDs, try this “framed” wrapper here. Hope you find this useful! Maybe I’ll get around to coding one for the CSD in the future.