Questions tagged [mmc]
The mmc tag has no summary.
20 questions
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how eMMC boot partitions work (/dev/mmcblk0boot0) and their handling in linux
i would like to fully understand the (special?) handling of eMMC boot partitions (in Linux).
As far as i understand, eMMCs offer some kind of low level partitioning. There is a special meaning to (at ...
- 61
0
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1
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How do I copy the image from SD card to the emmc using linux commands?
I am trying to flash a custom image from my SD card (mmcblk0) onto the emmc (mmcblk1) of my BeagleBone.
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 14.9G 0 disk
├─...
- 101
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1
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change default name for eMMC to other than mmcblkX
With previous platform the boot device was mtdX, and there could be only one sd-card, always appearing in the system as mmcblk0.
New system has internal eMMC, which is mmcblkX, as well as may have sd-...
- 111
1
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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 ...
- 111
0
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3
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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, ...
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3
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0
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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 ...
- 81
1
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0
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838
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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 ...
- 11
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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 ...
- 11
1
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1
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219
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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
- 11
1
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0
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93
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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 ...
1
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0
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225
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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
...
0
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0
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140
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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 ...
0
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1
answer
785
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** 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.
...
- 57
1
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1
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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 ...
- 11
2
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0
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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 ...
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