Under Linux I have found the sg3-utils that send SCSI instructions to devices. I was running various commands on the device (/dev/sdc and /dev/sg3) trying to get any response from the SD card, but I was only getting responses from USB connected reader. I had read that the sg_raw command allowes for sending arbitrary HEX formatted commands to a device, though none seemed to pass through the reader to the SD card itself (I tried the binary commands that where listed in the MMC spec and the SD spec). When looking at the linux drivers for MMCs and SD cards (sd_mod, mmc_core) it seems that if the mmc_core driver were to be used to interface with the card, the serial number ( cid.serial in 'mmc.c' in mmc_core) would be obtained during the card initialization period.

I verified the serial no's of both new cards on the Transcend website to make sure. On the genuine there is a large CE, various numbers, a serial number, size of card. A controller chip and flash memory chips, even the microSD versions. SD stands for secure digital, and these cards quickly rose to the top of the memory heap due to their high capacities and improved speeds. Ocarina of time gc iso. In the beginning, however, a standard SD card could only handle a capacity of 128MB to 2GB.

Would this be the case? And if so, is it possible to force the mmc_core driver to pass through the USB card reader and be used directly with the SD card? Are there any PCI MMC/SD card readers that would be able to have lower level access to the cards? Thank you in advance.

Information: Card readers: • Promaster Digital SD/MMC Card Reader • Realtek USB 2.0 Card Reader SD cards: • SanDisk 2.0 GB SD card • SanDisk 128 MB SD card • Kingmax Platinum 256 MB SD card • Kingston 2.0 GB SD card • Adata Suber SD Duo 1.0 GB Operating systems: • Fedora 9 • Backtrack 4 I had the same results with each combination of card reader/SD card. Thank you for the response. I am able to get unique 'Volume Serial Numbers' from the SD card when using the dir command in MS-DOS, though this number changes every time the card is formatted: I: >dir Volume in drive I is WIPED Volume Serial Number is C688-0DDD.

CARD IS FORMATTED. I: >dir Volume in drive I is CLEAN Volume Serial Number is 40F4-0355. CARD IS FORMATTED. I: >dir Volume in drive I is WIPED Volume Serial Number is 2409-16E7. I would like to be able to get a unique serial number for the card itself, not of the volume or partition inside the disk.

SD (top), miniSD, microSD cards Media type Capacity SDSC (SD): 1 MB to 2 GB, some 4 GB were made SDHC: 4 GB to 32 GB SDXC: 64 GB to 2 TB SDUC: 4 TB to 128 TB. Contents • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Overview [ ] Secure Digital includes five card families available in three different sizes. The five families are the original Standard-Capacity (SDSC), the High-Capacity (SDHC), the eXtended-Capacity (), the Ultra-Capacity () and the, which combines functions with data storage.

The are the original size, the mini size, and the micro size. Electrically passive adapters allow a smaller card to fit and function in a device built for a larger card.

The SD card's small footprint is an ideal storage medium for smaller, thinner and more portable electronic devices. SD (SDSC) [ ]. This section does not any.

Unsourced material may be challenged. ( October 2016) () The second-generation Secure Digital (SDSC or Secure Digital Standard Capacity) card was developed to improve on the (MMC) standard, which continued to evolve, but in a different direction. Secure Digital changed the MMC design in several ways: • Asymmetrical shape of the sides of the SD card prevent inserting it upside down (while an MMC goes in most of the way but makes no contact if inverted). • Most SD cards are 2.1 mm (0.083 inches) thick, compared to 1.4 mm (0.055 inches) for MMCs. The SD specification defines a card called Thin SD with a thickness of 1.4 mm, but they occur only rarely, as the SDA went on to define even smaller form factors. • The card's electrical contacts are recessed beneath the surface of the card, protecting them from contact with a user's fingers. • The SD specification envisioned capacities and transfer rates exceeding those of MMC, and both of these functionalities have grown over time.