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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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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7answers
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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 ...
20
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1answer
10k views

Mac OSX - Why is /dev/rdisk 20 times faster than /dev/disk

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 ...
18
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5answers
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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 ...
18
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6answers
9k views

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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5answers
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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. ...
14
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5answers
13k views

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 ...
13
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1answer
3k views

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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4answers
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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 ...
11
votes
3answers
387 views

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 ...
11
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2answers
3k views

How easy is to crack the following copy protection? [closed]

I am trying to copyprotect 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 ...
10
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6answers
11k views

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 ...
10
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2answers
4k views

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 ...
9
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4answers
5k views

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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4answers
5k views

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. ...
9
votes
1answer
15k views

On Windows 8, particularly on tablets with a permanently inserted micro SD card, is there a universal way to treat the card as a non-removable drive?

I have a Windows 8.1 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 ...
9
votes
2answers
2k views

How to delete files from my indestructable memory card?

A week ago I started getting intermittent IO errors accessing the SD card on my rooted Evo 4g. I eventually plugged it into my windows machine and tried to format it. It appeared to work, but when I ...
9
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1answer
1k views

How can I debug user mode driver failures in Windows 8

I have a 32 GB SD Card. Whenever I insert this card in to my newly upgraded Windows 8 laptop the OS stops responding normally. Metro Apps won't work. The system may or may not log in. Desktop apps ...
8
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1answer
54 views

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 ...
8
votes
6answers
22k views

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 ...
8
votes
3answers
6k views

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 ...
8
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4answers
10k views

Restoring a SD card after using it to root a device

I recently purchased the Nook Touch reading device. I rooted it using the instructions on nookdevs.com Rooting included using win32diskimager to somehow transfer an .img file onto the card. Rooting ...
8
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2answers
5k views

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 ...
7
votes
6answers
512 views

128 MByte vs. 128 GByte

I recently saw a comparison for 2005 vs. 2014 microSD card: in 2005 there was only max 128 MByte microSD cards, and in 2014, 128 GByte. My question: I'm not 100% sure. Is 128 GByte 1000× bigger than ...
7
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1answer
2k views

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 ...
7
votes
4answers
4k views

Which consumes more power: hard drive or SD card/card reader?

If I want to maximize the battery life on my laptop, where should I store my programs: my magnetic hard drive or my 16GB SD card? If you say hard drive, does a card reader draw significantly more ...
7
votes
3answers
9k views

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, ...
7
votes
2answers
9k views

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) ...
6
votes
2answers
29k views

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 ...
6
votes
3answers
1k views

Copy files from SD Card

I have a brand new 4GB SanDisc SD card. With lot of personal files. (jpg, exe, zip, rar, doc...) When I insert card in my notebook internal reader... first I get this message. Then, if I want to ...
6
votes
3answers
4k views

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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4answers
5k views

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 ...
6
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7answers
1k views

Mac OS X program to recover images from a memory card

I'm looking for a Mac OS X program to recover images from a corrupted memory card.
5
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3answers
10k views

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 ...
5
votes
4answers
5k views

My 4 GB microSD card only allows me to use 1 GB

My phone came with a 4 GB microSD card. On the card it lists that 3 GB goes to Muve Music which is Cricket's music program, and I get 1 GB... Well, I don't pay for Muve Music, so why ...
5
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3answers
8k views

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 ...
5
votes
2answers
4k views

How do I shrink an SD Card image?

I imaged a 16 GB SD card using the dd command. The card however, does not have more than 4 GB of data on it across 2 partitions (FAT32 & ext3). I would like to transfer this image on to a 8GB SD ...
5
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3answers
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Mounting 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 ...
5
votes
2answers
5k views

Using an SD card as a “LiveCD” on a MacBook Pro

I have a 4GB SD card on which I'd like to use like a Linux "LiveCD" (except of course it's not a CD) for my MacBook Pro. Any idea how I could do that? I'd prefer to not use rEFIt. To boot Mac OS from ...
5
votes
1answer
2k views

MicroSD card getting corrupted for no good reason

I recently bought an MicroSD card online. It's a Sandisk 16GB class 2. However, it has a nasty problem. Every time I fill it with my data, the fat tables get corrupted. I've tried reformatting it, ...
4
votes
3answers
662 views

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 ...
4
votes
2answers
16k views

How do you format a 2GB SD card to FAT32? (Preferably with Disk Utility)

I've been looking around for a way to do this for a while, but haven't been able to find the answer. I need to format my 2GB SD card to FAT-32, but I don't see the option in Disk Utility. If I ...
4
votes
6answers
4k views

ReadyBoost in Windows 7

I've bought an SD card today for my phot frame, but when I inserted it into my notebook I saw I could use it for ReadyBoost. Some background I'm a .net developer, using VMs and developing web ...
4
votes
3answers
2k views

How much does it wear an SD card to be frequently removed/reinserted?

My digital camera (a Sony α55) stores photos on an SD card. When I want to transfer these to my computer (a mid-2010 MacBook Pro), I have two options: use the USB cable to connect the camera to the ...
4
votes
2answers
2k views

Recover SDHC card used in an SD card reader

A while ago when SDHC cards were fairly new and all the office computers had only SD card readers, I made a 4 GB Class 6 ADATA SDHC unreadable and unformattable by trying to get it to work in SD card ...
4
votes
2answers
1k views

Does an SDHC card have any write (ECC) error recovery?

What happen if an SDHC card gets a write error (damaged cell / bad sector)? Will the whole card be unusable (to trash, all data written to that sector now and in future will be lost)? Or rewrite ...
4
votes
1answer
982 views

Are UHS SD Cards backwards compatible with existing readers and other hardware?

I was shopping for a couple of new memory cards for new cameras this year and noticed that there are some SD cards that are now UHS-1 compatible. I wasn't sure what that really meant so I went looking ...
4
votes
1answer
3k views

Write to SDHC card fails

I am using a Sandisk 8 GB micro SDHC card on my MileStone. The card is detected and mounted. I can read data from the SD card, but cannot write to it. There is no error when I attempt to write to ...
4
votes
1answer
1k views

How can I set a Removable External Device as a built-in Hard Drive?

I am using SSD with my laptop and running out of free space.. So I bought an 64GB microSD card as a secondary storage. But, when I launch My Computer, the SD card drive is recognized as, of course, ...
4
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1answer
1k views

How can I mount a sdcard and view it in /dev of a virtualbox guest

I'm trying to insert a SD card into my laptop (it's got a side slot for one) and have it show up on the guest machine running in a virtual box. Host: Windows 7 64 for x86 Guest: Ubuntu 64bit I want ...