Linux sd card info

Unique ID of storage device

This leads me to conclude that there is a way of getting a unique id of the CF card somehow. How can one achieve this in linux?

PS: I’ve purposefully left out any details of the product itself, as I’m wondering more in general terms how a system like this can build a unique id of the CF card.

Typically, wiping the CF card will not change the UUID so your experiment isn’t complete (if I’m understanding your post) without changing the UUID (you can use gparted to easily do this from the r-click menu). As for other ways to generate this information, MS uses the hardware configuration, iirc. Also, it’s feasibly easy to embed keys, etc. in device firmware (read privacy concerns about embedded firmware).

Your answer may be here : Reading Internal SD Card Information. Look for the internal card registries in /sys/block/mmcblk0/device/ (YMMV).

2 Answers 2

The card will have lots of information registered in a read-only manner.

Internal SD Card Information

Information about an SD card is encoded in its internal card registries. One of these is the Card Identification (CID) Register, a 16 byte code that contains information that uniquely identifies the SD card, including the card serial number (PSN), manufacturer ID number (MID) and manufacture date (MDT). The CID register is set when the card is manufactured and cannot be changed after it is set. (According to SD card specification the information is only to be written once, however if a card does not conform to the specification this information could be changed!)

How to read the CID from an SD card

One way to read the CID is to use a laptop with an SD card slot. Card readers in laptops are usually connected directly through the PCI bus (or IDE bus). This will not work through a USB card reader because the command to retrieve the card information is intercepted and not understood by card readers. Not all computers with built-in card slots will work, some internal card readers are connected through a USB bus.

Assuming you have the proper hardware, there are several methods you can use to get the card information. With Linux, reading the internal SD card information is simple. Insert the card and look under /sys/block/mmcblk0/device/ (this location may change depending on your device). You will see several attributes available that include the CID register and the information inside it.

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Is there an SD Card diagnostic utility?

Are there any SD Card diagnostic utility programs out there for Ubuntu? I would like to run tests on my SD card to check capacity, write speed etc. I have one for windows but I am looking for a Linux flavor and hope to find some source code.

4 Answers 4

Look for Disk Utility on you dash (as an option press Alt+F2 and type palimpsest )

Click on the disk you want information from, to test it click on Benchmark

To start benchmark, select Read only or Read/Write benchmark

On 13.04 (raring) palimpsest was replaced with gnome-disks («Disks» when you access it from the menu). The instructions are the same as posted by Bruno Pereira.

For Ubuntu 13.04 and later.

From the dash

A window will appear. Click Start Benchmark. to see:

I left the defaults and clicked Start Benchmarking. . It will run for a while, building the chart over time. You can see that my new SD card’s read rate is around 7 MB/s, while the write rate is only slightly over 2 MB/s.

The model shown here is a SanDisk Ultra SDXC with an advertised speed of up to 30 MB/s. As you can see, the transfer rate is not as advertised.

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How To Check SD Card Health Linux?

Home > All Storage Device Tips > How To Check SD Card Health Linux?

Checking the health of an SD card in a Linux system is crucial to ensure its reliability and prevent data loss. A healthy SD card is essential for smooth operations in devices like cameras, smartphones, or Raspberry Pi. Linux provides various tools and commands to assess the health status of an SD card. By monitoring factors such as read/write errors, bad sectors, and overall performance, you can gauge the card’s condition and take necessary action if any issues are detected.

Understanding how to check sd card health linux empowers users to maintain the integrity of their data and prolong the lifespan of their storage media.However, before you can even begin to recover data, you need to This is where things can get a bit tricky, especially if you’re not familiar with Linux commands and tools. If you want to recover data when sd card health check linux, you can also try AnyRecover.

Part 1. What is Linux?

Linux is a free and open-source operating system that is based on the Unix operating system. It was first introduced by Linus Torvalds in 1991, and since then, it has become one of the most popular operating systems in the world. Linux is known for its stability, security, and flexibility. It is used in various applications, from servers to desktop computers, and from smartphones to embedded systems.

Part 2. Recovering Data Before Checking SD Card Health Linux

Before linux check sd card health , it is essential to recover any lost or deleted data from the card. There are various tools available that can be used to recover data from an SD card, such as AnyRecover

AnyRecover is a powerful data recovery software that enables users to recover lost data from various scenarios, including accidental deletion, formatting, virus attack, device corruption, lost partition, and more.The software offers a cost-efficient and all-in-one functions tool for data recovery, previews deleted data, selective recovery, and the highest data recovery rate. Another data recovery tool named iMyFone AnyRecover is also available, which is a free data recovery tool that can recover lost data on various devices.

• File Recovery: recover over 1000 types of file formats, including photos, videos, documents, and audio files.
• Preview Function: The software offers a preview function that allows users to preview recoverable data before they make any purchases.
• Quick Scan and Deep Scan: Quick Scan is used for scanning for recently deleted files, while Deep Scan is used for scanning for more difficult to recover files.
• Partition Recovery: AnyRecover has a partition recovery feature that allows users to recover data from deleted or lost partitions.
• Support almost all secenarios that you data lost
• User-friendly Interface: it is easy for users to navigate and recover lost files.
• 100% Secure download and usage
• Compatibility: Windows&Mac&Android and iPhone operating systems

Too bad 99% of the ‘pictures’ were images from a map Waste of time and money.

it’s just perfect,I could die with it recovering all the data I deleted.

It shown my deleted file but I was unable to recover that.

It shown my deleted file but I was unable to recover that.

Once you have installed the data recovery tool, connect the SD card to your Linux system and run the tool. The tool will scan the SD card and recover any lost or deleted data. Once the data is recovered, you can proceed with checking the health of the SD card.

Part 3. Is There a Command In Linux To Check SD Card Health?

Yes, there are several commands available in Linux that can be used to check the health of an SD card. One such command is the fsck command. The fsck command checks the file system of the SD card and repairs any errors that it finds. It is a powerful tool that can help you diagnose and fix any issues with your SD card. The fsck command is used to check and repair file systems in Linux.

Part 4. Ways To Fix SD Card Health Check Linux

If the fsck command finds any errors on your SD card, it is essential to fix them to ensure the health of the card. There are several ways to fix SD card health check errors in Linux. One way is to use the dd command. The dd command is a powerful tool that can be used to write data to disks and partitions. To use the dd command to fix SD card health check errors, follow the steps below:

Step 1:Open the terminal and type the following command. sudo dd if=/dev/zero of=/dev/sdb bs=512 count=1 conv=notrunc

Step 2:Replace /dev/sdb with the device name of your SD card.

Step 3: Hit enter, and the dd command will start writing zeroes to the first sector of the SD card. Once the command is complete, use the fdisk command to create a new partition on the SD card.

Step 4: Format the new partition using the mkfs command.

The dd command writes zeroes to the first sector of the SD card, which removes any data that may be causing errors. Creating a new partition and formatting it ensures that the SD card is clean and free from any errors.

Part 5. Can Linux Check SD Card Health?

Yes, there are several Linux tools available that can be used to determine the health status of an SD card. One such tool is the smartmontools package. The smartmontools package is a set of tools that can be used to monitor and analyze the health of various storage devices, including SD cards. To use the smartmontools package to determine the health status of an SD card, follow the steps below:

Step 1: Install the smartmontools package on your Linux system.

Step 2: Connect the SD card to your Linux system.

Step 3: Open the terminal and type the following command:

Firstly,sudo smartctl -a /dev/sdb

Secondly,Replace /dev/sdb with the device name of your SD card.

Finally, Hit enter, and the smartctl command will start analyzing the health of the SD card. The smartctl command analyzes various parameters, such as the number of bad sectors, read errors, and write errors, to determine the health status of the SD card. If the command detects any issues with the SD card, it will display a warning message, indicating that the SD card needs to be replaced.

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Read SD Card Serial Number from CID

For my current project, I tried to read the SD Card serial number because the number is factory stamped and unchangeable, so it easily could be used to protect embedded firmware from being copied.

The serial number is stored in the Card Identification Register (CID) which is read by \’Command 10\’ as stated in the SD Simplified Specifications. Unfortunately, it is not possible to read the CID of the card with a USB adapter — you need a \’direct\’ SD interface. My iMX233 based development board has 2 of them, so it was an easy task to improve our firmware to read the CID and extract the serial number, but how do I check if I get the correct information?

Reading SD-Card SID

Luckily the Linux kernel provides the CID via the SD and MMC Block Device Attributes so you may use a Linux device containing a direct SD interface like your Android phone or an embedded Linux board. Unfortunately, you cannot know the real path of the SD card in the /sys file system so I can only give some examples and you have to try out the actual path yourself.

For example, on my Samsung Galaxy Note running Gingerbread, there is a /sys/block/mmcblk0 soft link pointing to:

mmcblk0 -> ../devices/platform/s3c-mshci.0/mmc_host/mmc0/mmc0:0001/block/mmcblk0 mmcblk1 -> ../devices/platform/s3c-sdhci.2/mmc_host/mmc1/mmc1:b368/block/mmcblk1

So I check the CID using the adb tool from the Android SDK (rooting is not necessary):

adb shell # cat /sys/block/mmcblk0/../../cid

On my Olimex iMX233 OLinuXino embedded Linux board I call the following (directly on the board):

cat /sys/block/mmcblk0/device/cid

The resulting hexadecimal number contains the following information:

 Name Field Width CID-bits ------------------------------------------------ Manufacturer ID MID 7 [127:120] OEM/Application ID OID 15 [119:104] Product Name PNM 39 [103:64] Product Revision PRV 7 [63:56] Product Serial Number PSN 31 [55:24] reserved -- 3 [23:20] Manufacturing Date MDT 11 [19:8] CRC6 Checksum CRC 7 [7:1] not used, always 0 -- 1 [0:0] 

To convert the hexadecimal number to a binary one, please have a look at my multiplatform Binary/Decimal/Hexadecimal Converter.

Based on an iMX233 CPU Board it may be easy to build an intelligent USB card-reader, supporting, for example, CID / CSD information and autonomic card tests.

Update:

I got a few emails pointing out that using the CID as copy protection is not a good idea because there are some cards on the market which are not compliant with the standard. These cards don’t prohibit CMD26 in SPI mode and therefore allow writing the CID. However, I\’ve never seen such a card.

Update 2:

You can find an online CID decoder here: Decode SD Card CID Register Data

Mike Bergmann

Technical software developer loving low level, bit peeking, embedded development as well as GUI, OO, and X-platform development.

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