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Questions tagged [mmc]

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Nanopi neo (Allwinner H3) does not boot from MMC any more

I have a device called Nanopi Neo Core with Allwinner H3 processor on board, 512MB of RAM and eMMC. I broke it and unable to find what to do to restore it. Originally it came with the Armbian ...
Anonymous's user avatar
  • 111
0 votes
3 answers
1k views

MicroSD card not found at boot time, works when ejected and reinserted

I have a Jasper Lake mini PC with an Intel Micro SD card reader, running Ubuntu 22.04. If I have an SD card in the reader when I boot the machine, the card is not found, no block device is created, ...
ajh499's user avatar
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2 votes
0 answers
852 views

Reducing flash wear from Systemd Journald (embedded device)

I'm experimenting with Systemd and in particular Journald on a Yocto Poky (Linux) based embedded device with eMMC storage but I'm worried about flash wear since the write stats are excessively high as ...
squashed's user avatar
1 vote
0 answers
561 views

Linux Mint 20.3 grub-install /dev/mmcblkX failed - fatal error

I've been beating my head against the keys trying to get Mint to install on an Acer 2-in-1. It does not have Legacy boot support and only has UEFI. I have made sure all BIOS options are correct such ...
mayce's user avatar
  • 11
1 vote
0 answers
780 views

Mounting Overlay File System and Using rsync to sync changes doesn't work for me

I'm working on an embedded application using Raspberry Pi CM4 running DietPi OS. I want to minimize MMC flash writes as much as possible for maximum lifespan. In my installation, there are a few ...
Jeepman03's user avatar
1 vote
1 answer
183 views

Failed to boot STM32mp157a-dk1 using a buildroot image

I'm trying to boot an STM32MP157a-dk1 using an image that i made with buildroot but when i boot i got this message : Unable to write "/uboot.env" from mmc0:4 Help me please !! H.M
ELmehdi's user avatar
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1 vote
0 answers
72 views

Timeout Error while using Command Queue

I am new to command queue mechanism in Linux. I am using the following: Kernel Tree: git clone https://android.googlesource.com/kernel/msm Kernel Ver: 4.9.96 While doing read/write I observe a timeout ...
nishad kamdar's user avatar
1 vote
0 answers
180 views

eMMC request timeout error

We have a custom embedded board with a 4GB eMMC chip connected. We see the following error while emmc read/write test on the eMMC device: mmc0: request with tag: 16 flags: 0x2000000002469030 timed out ...
nishad kamdar's user avatar
0 votes
0 answers
115 views

Test case for Deadline IO Scheduler

I am trying to measure the impact of Deadline IO scheduler on the performance of Block IO. My setup includes: Kernel Version: 4.4.154 Storage device: eMMC 64GB Distribution: VERSION="18.04.4 LTS ...
nishad kamdar's user avatar
0 votes
1 answer
684 views

** File not found /boot/uImage ** When using Angstrom Pre-built Images on BeagleBoneBlack Rev C

I'm trying to boot my BeagleBone Black into Angstrom using pre-built images found here. My SD card has two partitions BOOT & ROOTFS, and was formatted according to the procedures found here. ...
Niko_Jako's user avatar
1 vote
1 answer
1k views

How to make multiple SLC region on eMMC User Area?

I have to partition (i.e hardware partition) the UDA (User Data Area) of the eMMC as follows: First 336MB region should be in pSLC. Next 2GB region as MLC partition. The remaining region again should ...
Ajith's user avatar
  • 11
2 votes
0 answers
1k views

OS confusing eMMC device for SD card device - how to fix using udev

Busybox Linux running on an ARM Cortex A7 processor from NXP. The board has an SD card slot and also an eMMC chip that can be used for storage. The device is booting from nor flash. Strangely, when ...
arcomber's user avatar
  • 274
0 votes
1 answer
650 views

Finding the manufacturer of the eMMC Host Controller for HP Stream 11 Pro G3 Notebook PC/82A9

I am trying to install Linux on an HP Stream 11 Pro G3 Notebook PC/82A9 and need the name of the manufacturer of the eMMC Host Controller so that I can figure out which drivers to enable in the Linux ...
user avatar
0 votes
1 answer
762 views

How to find built-in SD card reader (MMC) details?

I have been attempting to mount a SDXC (exFAT) card into the built-in MMC reader in my laptop. I keep getting "mmc0: error -110 whilst initialising SD card" errors in dmesg and the device is never ...
sluginthemud's user avatar
0 votes
0 answers
1k views

Unable to read SD cards linux

I'm unable to read any SD card from Linux. I already tried both SD cards that I have here in different machines (windows and Linux) and they work flawlessly, I also booted from a live USB (the same ...
Jean Novak's user avatar
1 vote
1 answer
251 views

SD card issue in embedded linux

My setup: Embedded linux version 3.x on an ARM board with a SD card. After running for a couple of months, I am getting this print in the console. I want to understand this issue, and fix it. ...
BBM's user avatar
  • 19
11 votes
2 answers
2k views

USB mmcblk support (realtek or others)

Can a USB card-reader ever appear as /dev/mmcblk0 and support the MMC ioctl commands? I see there are some kernel driver modules such as: rtsx_usb_sdmmc.ko (rtsx-usb-sdmmc) rtsx_usb.ko (rtsx-usb) ...
Gregor's user avatar
  • 1,319