Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Questions tagged [sd-card]

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

325 questions
11
votes
2 answers

Finding a unique identifier for SD cards

I have dozens of SD cards that I need to keep track of for a project. Right now, they each have a number physically written with permanent marker on the outside. This is OK, but I want to see if there is something unique that's built into each SD…
hpy
  • 4,567
8
votes
6 answers

Is there a "SD Memory Card Formatter" equivalent for Linux?

I routinely need to completely erase SD cards. This process is greatly speed up using SD Memory Card Formatter. Unfortunately said program seems to be unavailable under Linux and alternatives (e.g.: dd or shred) take a LOOOONG time. AFAIK SD/MMC…
ZioByte
  • 870
7
votes
0 answers

How can I find a list of card readers that supports blkdiscard

The common answer on the Internet is to read the spec (they never mention it) or know the chipset (hard to know before buying) before buying. Where can I find a list of SD card readers which supports this feature and allows the use of blkdiscard? If…
Tankman六四
  • 967
3
votes
0 answers

Why ubuntu is so slow on the SD card?

I have managed to install ubuntu on a 128GB SD card (class 10) which dual boots with windows 10. However, ubuntu works like an old guy. It comes up so slowly. It tends to halt and overall very slow function. And the bigger problem is that the wifi…
user2326844
  • 131
2
votes
1 answer

Chrubuntu on Acer C7: SD card reader only works on AC power?

I have an Acer C7 chromebook on which I have installed Chrubuntu. Everything works great except that the SD card reader doesn't work when the computer is running from battery power. It recognizes the card and works perfectly as soon as I plug it…
Bridget
  • 21
  • 1
1
vote
0 answers

Computer ran out of battery while formatting an MicroSD card, now card is not recognized

I bought a new Samsung 256GB Pro Endurance Micro SD Card. I wanted to format it so I could load an operating system for a Raspberry Pi. My laptop running Ubuntu 23.04 died for lack of power in the middle of the formatting operation. I didn't have…
Steve Cohen
  • 385
1
vote
1 answer

Copying to SD card slows down after few hundred megabytes, sometimes halts completely

When I copy big files ( > 300MB ) from hard drive to SD-Card, copying slows dramatically after first 400mb, sometimes the copy process never ends. I tried copying with double-commander, rsync (with progress indicator), and cp. my setup: ubuntu…
Berry Tsakala
  • 161
1
vote
1 answer

zerofree validation: before and after measurement or visualization

zerofree reduces raspberry pi sd card images by writing zeros to free space. The zerofree process can be run from an Ubuntu PC directly on the SD card: apt-get install zerofree umount /dev/sdc1 #(change sdc1 to your raspi boot partition…
gatorback
  • 1,384
  • 23
  • 48
1
vote
1 answer

Can Linux reliably run from an SD card?

If I were to install and run Debian Linux from an SD card or microSD card, would this be less reliable than running from a regular HDD (e.g. a 2.5" Western Digital Blue)? The system and home folders would all be placed on the SD card.
Village
  • 5,035
  • 15
  • 50
  • 84
1
vote
1 answer

8G SD card showing 30M

I have a 8GB SD card. When inserted it show no partitions: $ lsblk /dev/sdd NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sdd 8:48 1 30.6M 0 disk The fdisk say: fdisk -l /dev/sdd Disk /dev/sdd: 30.6 MiB, 32096256 bytes, 62688 sectors Units:…
user129107
  • 241
0
votes
0 answers

Sd card not appearing on Linux steam

I was using the Linux version of steam on my Chromebook OS but I didn't have enough space available on my local drive to download the game,I had a SD card inserted though but to my dismay I was unable to find my SD card when I tried to add it as one…
Hoshi kat
  • 1
0
votes
1 answer

Expand linux partition over external sd card

I have linux installed on a laptop with only 32 GB SSD and I'd like to be able to add an SD card and extend the system so that that the internal SSD and external SD card are continuous. I'd like the system to still boot from the internal SSD but…
Alon Gelber
  • 113
0
votes
1 answer

Read data from damaged SD card

There is damaged SD card, some problems with connectors I guess. After plugging in this SD Card mounts and becomes readable for about 30 seconds and data is reachable for download then for some time the card is gone, then connects again and falls…
John
  • 297
0
votes
1 answer

How to repair an overclocked microsdcard?

I overclocked my raspberry pi 2 myself yesterday. However I also increased the sd_freq. Now after a reboot my microsdcard is mounted as read only. I have a laptop with linux installed where I can try to repair it. Here is fsck: fsck /dev/sdb6 fsck…
TheWatcher
  • 45