Questions tagged [sd-card]

A storage medium used in mobile devices like digital cameras, tablets, smartphones, ...

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votes
4answers
10k views

Stress testing SD cards using linux

I got into a little debate with someone yesterday regarding the logic and/or veracity of my answer here, vis., that logging and maintaining fs meta-data on a decent (GB+) sized SD card could never be ...
4
votes
3answers
836 views

Why does a gunzip to dd pipeline slow down at the end?

my command: gunzip -c serial2udp.image.gz | sudo dd of=/dev/mmcblk0 conv=fsync,notrunc status=progress bs=4M my output: 15930949632 bytes (16 GB, 15 GiB) copied, 1049 s, 15.2 MB/s 0+331128 ...
3
votes
2answers
110 views

Replicating an SD card

BACKGROUND An SD card has been configured for a Raspberry pi. The goal is to replicate the SD card exactly (OS, apps, data) so that the replica will function in a rPi exactly like the original \ ...
8
votes
2answers
10k views

Linux - couldn't mount RDWR because of unsupported optional features (400)

I try to run Android from SD-card. This card is prepared. There are partitions: boot(FAT32), rootfs(ext4), system(ext4), cache(ext4) and usedata(ext4). Boot partitions has files to run u-boot: MLO, u-...
6
votes
1answer
1k views

Defining a state of a failed SD cards by kernel tracing?

I'm having a series of failing/sometimes failing SD cards. They either give one of the following dmesg outputs: The completely dead ones (don't list at /dev/mmcblk0): [ +0,000010] mmc0: error -110 ...
5
votes
1answer
605 views

card reading killing my battery, on macbook pro running Debian

I am currently using a macbook pro but the operating system is debian 8.2 not os x I am using a macbook pro but there's this one device that's just draining a lot of power. This USB device: Card ...
4
votes
1answer
7k views

mounting a SD card without a partition

I try to mount a SDHC card under GNU/Linux. Unlike what happens usually, /var/log/syslog doesn't mention sdb1, just: Jul 26 16:07:53 xvii kernel: [ 159.404842] scsi 6:0:0:0: Direct-Access Singim ...
2
votes
0answers
313 views

What can I do if my USB flash drive / SD-card is write-protected or read-only?

When I plug in my USB flash drive (or SD card), it shows up on my computer as write-protected or read-only. I am unable to transfer data to it, nor can I modify or delete any files already stored on ...
2
votes
1answer
3k views

Linux 2.6.32, busybox, Identify physical SD device

I have a USB card reader with two SD card interfaces and two USB ports (so it can also act as a USB hub) all on the same device. I am running an embedded Linux device that is unsupervised in its use ...
10
votes
2answers
7k views

Utility to TRIM unallocated space on drive

I have a drive (SD card) with a few ext4 partitions but also some unallocated space. The fstrim utility can only work within a filesystem. Before I reinvent the wheel and write one, is there another ...
7
votes
2answers
4k views

How can one force a re-scan of an SDIO bus from Linux user space?

On an embedded Linux platform, I have a network adapter attached to an SDIO interface. There is no Card Detect signal on this particular bus. If for instance, I turn the network adapter power on or ...
5
votes
2answers
21k views

Trouble getting busybox switch_root to work

I'm working on an embedded ARM Linux system that boots using initramfs. (Here's some background from a couple earlier questions, if you're interested.) So far, thanks in part to help received here, I ...
2
votes
1answer
14k views

How would you install the RTS5139 Card Reader driver for use on Fedora 19

Is it possible to install the rts5139 driver in Fedora 19 3.11.8-200.fc19.i686.PAE kernel ? I have a Lenovo G570 laptop, on which I run Fedora 19 (3.11.8-200.fc19.i686.PAE kernel) on one hard disk, ...
1
vote
1answer
1k views

How to mount btrfs partition?

I've installed xbian distro on RPi. I want to edit the files in my SD card using my computer, Ubuntu 14.04. However, when I insert the SD card, the Ubuntu cannot mount the Xbian partition, and gives ...
1
vote
1answer
5k views

RTS5129 Card Reader with Ubuntu 15.10

I recently bought a notebook, it's an Acer Aspire VN7-571G and it has an integrated SD Card reader. I've never used it since I bought it but I noticed today that by inserting an SD Card into the ...
0
votes
0answers
29 views

Deactivating disk cache for specific device or partition? (play 2160p video off SD card without sacrificing RAM space other programs need)

I would like to deactivate the disk cache for /dev/mmcblk0p1 in order to preserve more RAM for other system parts while playing 2160p video off /dev/mmcblk0p1. 2160p videos ravenously wipe the RAM ...