Questions tagged [sd-card]
Secure Digital (SD) cards are a widely used memory card format used by many technology brands brands in portable electronic devices such as digital cameras.
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Why is “/dev/rdisk” about 20 times faster than “/dev/disk” in Mac OS X
According to the rasbery pi documentation, You can load your OS to a flash card with either /dev/disk or /dev/rdisk.
rdisk stands for raw disk.
/dev/disk is a block level device, why would rdisk ...
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How can I intentionally break/corrupt a sector on an SD card?
I need to test the resilience of some read/write code for some embedded hardware. How might I sacrifice a few SD cards and break several known sectors for a controlled study?
The only thing I can ...
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What's the life expectancy of an SD card?
I have some SD cards that I use. Is there a limit to how many times I can write over them? If I leave information on a card, is there anything that can cause it to lose this information eventually (...
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How to access an SD card from a virtual machine?
I want to format an SD card from my Linux virtual machine. I have a built-in SD card reader in my laptop. I tried using VirtualBox and VMware Player and installed Ubuntu 10.04 guest. None of them are ...
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How do you format a 2 GB SD card to FAT32 (preferably with Disk Utility)?
I've been looking around for a way to do this for a while, but I haven't been able to find the answer. I need to format my 2 GB SD card to FAT-32, but I don't see the option in Disk Utility.
If I ...
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How to mount a multi-partition disk image in Linux?
I downloaded an raw SD card image that has two partitions.
It caused some file system errors when I tried to dd it directly into an SD card. I am not sure if the card is defective or the image.
Is ...
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Recover Data from Card that cannnot be read
I am trying to help a friend who is very concerned that she has just lost all of the data on her 32GB SanDisk microSD card. I told her I would post this and see if anyone could offer help.
Here are ...
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Choice of filesystem for GNU/Linux on an SD card
I have am embedded ARM-based system running on an SD card. It's currently Debian GNU/Linux using ext3 as filesystem. As I'm about to reinstall the system, I started wondering about changing to a more ...
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On Windows 8 or 10, particularly on tablets with a permanently inserted SD card, is there a universal way to treat the card as a non-removable drive?
I have a tablet, a Surface Pro, and I have a micro SD card that is permanently inserted. I use it to store media files like music and video.
Windows, recognizing that it is a removable drive, deletes ...
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How do I repartition an SDHC card in Windows?
How do I repartition an SDHC card (4 GB or more)? Do I need third-part tools or Linux (a live CD solution would be OK)?
In Windows' Disk Management the option Delete Partition is dimmed out:
I ...
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How to use Cygwin to copy an image from an SD memory card
Long story short, I'm working on a Windows 7 machine and I'd like to strip the image off an SD card (backing up the card from a Raspberry Pi). I'm trying to use Cygwin, but not having much success.
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Why aren't SD card 'contacts' uniformly placed?
As you can see above, Some contacts seem to be longer than the rest. Also, on the SD card (2nd from top) the last one seems to be thinner and also closer to the seventh pin.
Why not just uniformly ...
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Why do some USB readers have issues to read large capacity SD cards?
I have noticed that with some USB readers (not to mention other media devices, such as digital cameras) there seems to be an upper limit to the amount of internal storage they can support. When I ...
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Best way to salvage SD cards exposed to salt water and contents of the lithium batteries?
So, right off the bat, I want to acknowledge that the data on these cards is likely lost to time. However, I am hoping someone may know some best practices to check for sure.
I recently recovered some ...
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SSD, SD, eMMC, Raw NAND what are the differences?
so the underlying technology with SSD, eMMC, SD, USB Flash etc... is NAND flash correct? So is the difference between all of them just the way controllers are implemented? Or are the technologies ...
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Recover data from SD card
I have a 2 GB Kingston microSD card which is about three years old. I put it in a reader today in my Windows Vista computer, wrote a 32 MB file onto it, safely removed it, and then tried to ...
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Is there any way to find the remaining life on a SD card?
For SSDs we have a variety of programs that read their remaining life. I'm looking for the same thing for memory cards in a situation where they get a lot of writes. Google is not only not returning ...
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Performance difference between SD and MicroSD cards?
If you compare a MicroSD card with an advertised speed of 48 MB/S to a full size SD card with an advertised speed of 48 MB/S (from the same manufacturer), should their performances be identical?
Or ...
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Error whilst initializing SD card on Linux
I have noticed troubles with my microSD card in my Android phone and when I tried to insert it into my Linux laptop, I get the following error in dmesg:
[ 247.588279] mmc0: error -123 whilst ...
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Cannot remove Micro SD card's read-only attribute after Ubuntu image
I can't remove the read-only attribute from a Kingston 32 GB Micro SD Card. I want to wipe clean the whole card.
I was given a Raspberry Pi 3 and a 32 GB Micro SD Card and an Echo to play around with....
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Can I use something like the SSD TRIM command on a SD card?
SSD flash hard drives have started to support TRIM in order to avoid the slowdown that occurs after a while.
How do I do something similar on a SD card ?
Like reformating the SD card, but at a ...
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Is it possible to disable the "scan and fix" message when inserting an SD Card?
Every time I insert the SD card from my camera into the card reader, I get this dialog:
Of course there is no need to scan it. Is there a way to disable it?
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How can I test the full capacity of an SD card in Linux?
I purchased a 64 GB SD card from eBay. It works fine when I burn an Arch Linux ARM image to it and use it to boot up my Raspberry Pi.
However, when I try to create a single ext4 partition on it to ...
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Is the lock mechanism on an SD card hardware, firmware, or software (driver,OS) enforced?
Where is the lock to read-only mode enforced with SD cards? Is this done inside the card itself physically, in the firmware of readers, or in the OS? (Some other place?)
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Is there any way to tell if an SD card has been used?
I ordered a “new” micro SD card from Amazon Marketplace. However, it was sent in a small cheap plastic bag instead of the original package. I put it into my PC and found it to be empty but formatted.
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See contents of SD card in terminal window on Mac OS X
I have photos on my SD Card. I can not see the files on my Mac. I can see it in my camera and when I load the micro SD card in phone, I can see the pics. My Mac is not showing any files. I am assuming ...
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Reformat SD card to NTFS
I want to reformat a 16 GB SD card to NTFS so that I can use it to transfer large files (larger than 4 GB) from one computer to another easily, but my computer will only allow FAT variations....
Dawn Milford
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Cannot delete a file. The file or directory is corrupted and unreadable
I have a file on my laptops SD card. I use the SD card as an extension of my hard drive.
When I try to delete this file (.jpg) I get the following error message
Error 0x80070570: The file or ...
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Does it make sense to put your operating system on a SD card?
A friend suggested putting the whole operating system on a SD card, arguing that access time delays where much shorter than a regular hard drive, which needs to spin up first.
Wikipedia, however, ...
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Finding attributes of mounted SD card
My SD card is automounted fine as /dev/sdb:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 80G 0 disk
├─sda1 8:1 0 78G 0 part /
├─sda2 ...
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How to tell if you have a fake sd card
I've been given some flash drives that appear to be fake. The silk screen says 64 gigs, and they show up as 64 gigs to the OS.
However if you attempt to write any files larger than 4 gigs the file ...
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Installing Windows on an SD Card
Assuming you have a built-in slot, is it feasible to install Windows 7 (Vista, or XP for that matter) onto a 32gig SD card? By install, I mean house your windows folder and any OS required folders and ...
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What does 100x mean, for an SD card?
When I read the information about an SD card, I notice there is an information that is reported as 100x. What does that mean? To what is it referring?
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Standard SD card and Micro SD card with adapter; same speed?
I'm going to buy a new SD card to be used in my car's audio player. What I would like to know is, if I buy a micro SD card with adapter, will it provide the same read/write speed as a standard SD card ...
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USB flash drives or SD cards with S.M.A.R.T
Do any mainstream manufacturers incorporate Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.) into their USB flash drives (aka "USB sticks") or SD cards?
If not, why not? It can't be ...
user11574
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How can I access /storage/emulated/0/DCIM on android device?
I recently lost the contents of a micro-SD card and hadn't backed up the contents recently enough. Luckily, I noticed that the pictures I was missing happen to be in /storage/emulated/0/DCIM/....
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Cloning an SD card onto a larger SD card
I'm using Ubuntu 12.04. I have an old 4GB SD card, and have just bought a new 16GB SD card. I would like to copy everything from my old 4GB SD card onto the new 16GB SD card. I was afraid that the ...
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What is the replacement of the floppy
While CD (and to an lesser extend DVD) disks have reached the price-point of the floppy, they have one significant downside, it is WORM (Write-Once Read-Many) media, allowing it to be used only one ...
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Does ReadyBoost really improve performance? [duplicate]
Possible Duplicate:
Does Windows ReadyBoost have a meaningful impact on performance?
Does using an SD card with ReadyBoost help? Would I notice any difference on a 32-bit netbook with 1 GB ...
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SD Card RAID System
Is it possible to setup a RAID system with SD-cards? Of course, the system would work better if all of the cards are exactly the same. If it is possible, can all or most operating systems handle this ...
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Bypass read-only SD card with missing 'Lock' slider
I have an SD card, that is broken, the slider for the "Lock" is gone. When I put it into my computer it turned out to be in read-only, How can I override this with software? I need to format the SD ...
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Can I use dd to clone a larger SD card to a smaller SD card if the actual partitions will fit?
I have a 16GB SD card that has a few partitions on it (it's actually the card for a Raspberry Pi). I have several other 4GB cards that I want to clone the primary card to. The 3 partitions on the ...
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Is flash storage affected by magnetic fields?
I have several SD cards and USB flash drives that are often laying around my work space. Do I have to be careful to keep magnets away from them? (This paranoia is showing my age - I remember needing ...
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How easy is to crack the following copy protection? [closed]
I am trying to copy-protect some work, which is a bootable SD card booting a Linux kernel on ARM device (Raspberry Pi). I am using this approach:
The approach uses an initrd to mount an encrypted ...
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Do SDXC cards need a special card reader, or is software support sufficient?
Can a card reader that accepts SD and SDHC cards support SDXC cards with the appropriate software support, or is a card reader specifically designed to accept SDXC cards needed? I'm looking for an ...
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SD cards often mount read-only on Windows despite being unlocked and always working in cameras
I have a HP netbook that's at least three years old and running Windows 7 Starter. It has a built-in SDHC card slot.
I have a couple of 8 gig SDHC cards that I switch between my digital camera and ...
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what appropriate "Allocation Unit Size" for an exFAT SD card with ReadyBoost
I've brought an 4GB SD card and I'm dedicating it for use by ReadyBoost (on Windows7)
Im looking to get the most profit on performance, so i've formatted it with exFAT (as recommended by Microsoft) ...
user8228
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How can I create a single ISO or IMG file from an SD card?
I have an SD card that contains 2 volumes (H and I). I have found programs where I can turn Drive H and I into an ISO or IMG seperately. But I want a program that will take the entire card and turn ...
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Windows 7 ReadyBoost - What File System To Use With Flash Card/Drive?
NTFS, exFAT or FAT32? I know that FAT32 has a limit of 4GB transfer per file, but is it faster and better than NTFS or exFAT? Since Windows 7 by itself uses NTFS, it remains logical to format flash ...
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How do I detect SD card insertion (just the SD card, not the card reader) in Linux?
I have a headless debian (3.2.0-3-686-pae) to which I wanted to attach a standalone card reader to automatically process my pictures. The idea is that the reader will be plugged in all the time and I ...
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