Cid Clone Sd Card

CID changeable SD and micro-SD cards — Orest Bida

orestbida.com

Samsung MB-MGBGB Micro SD HC - made in Korea2012/2013 ... If you want to change the CID of your SD card, check out these articles by Richard Burtons for guidance. Every SD/micro-SD card has a unique factory CID (Card Identification Number) — assigned to it by the manufacturer — which cannot be changed, for security & authenticity reasons. There are however certain models of SD/micro-SD cards which allow users to set their own custom CID value. CID changeable SD and micro-SD cards are regular cards which additionally allow you to lock and protect the content of the sd card itself.

How to Change CID on SD Card?

www.hugdiy.com

Some devices lock SD cards based on CID, blocking access even when the data is intact. A fixed CID becomes a roadblock if you’re trying to clone, repurpose, or reuse cards across systems. Changing the CID can bypass hardware restrictions, enable cloning for kiosks or arcade machines, and allow custom ID tagging for deployment. The CID is a factory‑burned identifier on every SD card. It holds the manufacturer ID, OEM ID, product name, revision, serial number, manufacturing date, and CRC. This 16‑byte string ensures each card is unique. Most cards lock this value to prevent fraud or cloning. A non-changeable CID can block device compatibility tests, stop cloned card setups, or prevent custom labelling for apps that rely on unique IDs. Some devices check the CID before granting write access. Other users clone cards for batch setups in kiosks or arcade machines. Developers may need custom branding when distributing SD cards with proprietary firmware. Changing the CID opens these possibilities. You can clone a master card for multiple devices. bypass device locks tied to original cards. You can assign your identifier to each card in a fleet. This step requires a “CID changeable SD card” model.

How to Choose an SD Card with Changeable CID — A Real-World Guide

electronics.alibaba.com

Avoid unknown controllers—many cheap clones fail CID writes silently. Write endurance guarantee: Repeated CID rewriting stresses NAND management logic. Cards rated for ≥10,000 rewrites last longer in dev/test cycles. SD standard compliance: Must be SDHC (up to 32GB) or SDXC (64GB+). There are two primary ways to obtain an SD card with changeable CID—and they differ sharply in control, risk, and longevity. Pros: Plug-and-play; tested with specific devices; often include map-loading utilities; no technical setup required. If you’re a typical user, you don’t need to overthink this. An SD card with changeable CID is only relevant if you’re deploying navigation maps on legacy automotive head units (e.g., VW MIB1, older Garmin, or proprietary GPS systems) that validate hardware identity before loading map data. Skip it unless your device explicitly checks CID at boot or during map initialization. This piece isn’t for keyword collectors. It’s for people who will actually use the product. An SD card’s CID (Card Identification register) is a 16-byte read-only identifier embedded in its controller firmware.

What is SD card CID number? – ZELEMAR electronics

zelemar.eu

Here’s a breakdown of the CID register fields and what each component means: The Manufacturer ID (MID) is assigned by the SD Association (SD-3C LLC). It is considered confidential information, so an official list is not published. Many SD card brands are produced by OEM suppliers, and the MID and OID may reflect this. In some cases, they appear to show the producer of the SD card controller, but not the brand of the SD card. An SD card is a compact storage device that contains both a microcontroller and a memory chip. Key technical information about the card is stored in internal registers, which include: ... The OCR, CID, CSD, and SCR registers hold card-specific and content-related information, while the RCA and DSR registers handle active card configuration parameters. The CID register is a 16-byte (128-bit) code programmed into the SD card by the manufacturer. It contains detailed identity data about the card. ... However, in cases where SD cards do not fully comply with the official specification—or when specific backdoors are discovered—the CID can be rewritten. The Manufacturer ID, as well as the whole CID, is valid and can be trusted only if the SD card is original and not counterfeit. Therefore, based on the CID number, one cannot be sure that the card is original.

Changing the CID on an SD card - Working! - Richard's stuff

richard.burtons.org

(tl;dr – skip to bottom for instructions, see also update post) The CID register on SD cards is supposed to be read-only, which means it can be used to lock devices to specific SD cards, preventing the user swapping them out, which is very annoying. This can result in you being stuck with a smaller card than you’d like in a device or not being able to use a backup in case of damage. List the /dev/block folder and make sure the device you going to use appears and disappears as you insert and remove the SD card to be sure. Supply the new CID you want to set on the command line. If you only need to change the card serial number (part of the CID) you can supply the old CID and the new serial number and the new CID will be calculated for you. I suggest you make a note of the old CID first, in case you want to set it back later. Hello Leszek long time ago you were writing about order of changeable CID sd cards from China. Were you able to make such order? Did it work? In my case they don’t agree to send a sample and accept order of minimum 100pcs. That is a rather expensive. Of course it would be no problem to sell all this SDs, but $5 for a piece without certainty that it will work is a little bit risky. The fact is that indeed when you have the right cards, that kind of device is by no means indispensable, just as EVOPLUS_CID is not even (honestly speaking), simply send the right commands via SPI protocol is the easiest and cleanest way. Even if nowadays Linux can do it without the need for anything else, as Android, Windows nor other kind of OS, that isn’t the better way, IMHO: SPI it is. ... The device in question isn’t a standalone cid programmer for compatible cards. It’s an sd card sized device that takes a microsd card for storage and passes everything through, except cid requests which it responds to itself.

Cloning SD Cards with Unique IDs - Raspberry Pi Forums

forums.raspberrypi.com

Nexcopy provides a way for me to make 20 duplicates at a time and get the unique CID of each in .csv format on my PC which I could then print on stickers, but the CID is 120 characters and I can't have my users manually entering that on their phone lol. I think using an SD duplicator would still help even if I have to manually generate and add an ID afterwards. Sulley wrote: mikerr I looked into using the SD cards serial number but they're 120 characters long and I can't expect users to enter that on their phones lol. I think you're referrring to the CID which is much more than the just serial number (though the serial is in there too) The CID number is a compilation of information about the card, such as manufacturer, date manufactured, checksum total, GB size and more. http://www.getusb.info/how-to-read-cid-on-sd-card/ (that link shows nexcopy data too) The SD serial is actually just the same length as the Pi serial : I'm pretty sure the first mount is pretty early on in the boot process so this should be able to be done. Thank you for proving me right. As I said, that is irrelevant in this case as Sulley will be building the systems from scratch and will take a note of the Pi serial numbers.