Questions tagged [data-storage]
The data-storage tag has no usage guidance.
74
questions
0
votes
2
answers
59
views
Is it possible that writing too quickly to an sd card can result in quicker failure?
I found this post suggesting that writing too quickly to an sd card will shorten its lifespan. The context is an sd card that will be used as external storage on android, written to with rsync. The ...
- 101
0
votes
0
answers
96
views
Why is a spliced USB extension cable frying USB Drives?
I cut a functional USB-A extension cable in half, reconnected the wires, and plugged a USB drive into it. This cable killed three USB Storage Drives. Why?
The above photo shows the cable. I know, I ...
- 153
0
votes
1
answer
65
views
ESP32 doesn't process data sent as JSON from the web app while the data is being sent correctly to the ESP32
how are you?.
I'm making an application where a ESP32 is being used as web server, currently I have a web page made to configure the device.
In this pages is a ...
- 158
-1
votes
2
answers
215
views
Is it possible to combat SR Latch oscillation or there are better alternatives?
I need to store a bit value and then ignore any attempts to store/change it again until it's reset by another signal. So I figured the SR Latch is suited for the task. However in my project there is a ...
- 99
2
votes
1
answer
452
views
Why do SSDs have a limited lifespan?
Why do solid-state drives even have a limited number of read/write cycles, usually 100,000-300,000 cycles?
For hard-disk drives, it is understandable why they wear out. That is because they have ...
11
votes
1
answer
2k
views
What is the technical difference between audio CD-R(W) and data CD-R(W) discs?
I just repaired a Sony RCD-W100 CD-recorder and want to test the recorder functionality. The manual 'says' I can only use audio CD-R(W) discs. Never heard of CD-R(W) discs just for audio. On the ...
- 1,317
0
votes
1
answer
66
views
Solid state data?
I'm wondering if there is a way to store a small integer in a way that if you turn the microcontroller (an atmega328, in my case) off, and then turn it back on again, the variable won't reset. Do I ...
- 37
1
vote
1
answer
1k
views
How to kill a NVME M.2 SSD?
I have an SSD that has completely failed within a week of purchase, unfortunately I have my personal and business info on there. I need to send the drive back for a replacement, however I also need to ...
- 137
0
votes
1
answer
122
views
How to store bits asynchronously without clock resetting all bits?
I am working on a circuit that has 8 buttons that need to hold the value once pressed.
I'm currently using a 8 bit flip flop (74LS273 in the diagram).
The problem is that all bits get reset on the ...
- 3
1
vote
1
answer
253
views
Shared storage between microcontroller and Embedded Linux system
I'm working on a project in which I have to solve this problem. I'm not sure if it's unique, but it's certainly not one I've seen before so I thought it'd be interested to get some input from people ...
- 1,295
1
vote
0
answers
332
views
Logging GYRO Data via cheap modules or Black Box
I'm trying to figure out a simple solution to log gyro data to use with camera stabilization software.
I know I can use the blackbox from an old flight controller with an external SD card logger, ...
- 21
2
votes
1
answer
128
views
Mass storage for timing critical applications
I am working on a data logger that requires measurements to be taken during narrow time windows. I have been storing the measurement data on SD cards, however, the write times are very inconsistent, ...
- 21
2
votes
0
answers
237
views
Would it be possible to use a GSM without a SIM card?
I would like to reduce the footprint of my PCB (a simple IOT GSM impl.). Given a common GSM such as SIM800/868/900l etc. Would it be possible to completely replace the footprint of a SIM card holder (...
- 21
0
votes
0
answers
57
views
Compatibility of embedded device with USB drives
It seems to be a frequent problem with embedded MCUs and USB drives having compatibility issues. Some type of drives from certain vendors work, others do not. Is there a trick to getting high ...
- 381
0
votes
1
answer
79
views
Power outage detection to kickstart a safe shutdown and data retention process
I plan a system that operates on a 5v rail.
The power is supplied from an outside DC source.
The 5 V powers an RPI CM4 and other components that are controlled by it.
The whole system requires up to 5 ...
- 161
1
vote
3
answers
111
views
Is a computer wired controlled sd card or USB flash drive feasible (like the Scylla cards connected with a laptop in prison break)?
Is a computer wired controlled sd card or USB flash drive feasible (like the Scylla cards connected with a laptop in prison break)?
It means there is no storage on the flash drive itself. When a ...
- 13
0
votes
3
answers
294
views
Old tvs, how did storing settings work, and what changed in the tv when we tuned a channel?
I don't have an EE background, but I would like to understand some aspects of old TVs.
When we tuned channel what exactly changed inside the tv. Was there a circuit card in the tv where something ...
- 271
23
votes
7
answers
9k
views
How can I actively provoke data rot on a storage unit?
For a project, I am looking to deliberately provoke data rot on a storage unit (e.g., a hard drive or a flash drive). I understand that most modern OSes and filesystems as well as hardware have ...
- 359
0
votes
1
answer
70
views
How can I let 2 devices take turns accessing a SIM card?
I need to store data in a sim card using one device, then another device needs to access that data. They do not ever need to use it at the same time. A question was asked about this a few years ago ...
0
votes
3
answers
125
views
Storing data for a really really long time [closed]
How might one store data for the far future? (100 years and up, possibly centuries)
This is entirely hypothetical but would it be possible for semiconductor based data storage to have similar ...
- 1,400
1
vote
1
answer
206
views
Calculating data retention rate of SLC NAND
Background
I am a software developer trying to calculate data retention rate of a NAND memory ic. I have minimal knowledge/experience with electronics.
I have a constraint on data retention, 15 years. ...
- 111
1
vote
3
answers
322
views
How to store one bit without the use of an IC? [duplicate]
I am trying to store a bit of data from a circuit, but I don't want to use an IC like an EEPROM chip. Is it possible to store one bit with a transistor or something else to that effect?
0
votes
1
answer
155
views
How do modern displays output data to pixels? [closed]
Do new displays still write pixels one at a time? I thought this was the case until I saw a video showing slo-mo footage of a display, in which it was clear that all of the pixels are on at the same ...
- 65
0
votes
1
answer
49
views
User controlled storage devices existence
Today's memory devices have a lot of logic embedded before data is actually written onto the NAND pages.
An example could be wear levelling algorithm , FTL functionalities etc.
The typical life of a ...
- 1,013
0
votes
2
answers
466
views
data storage, FPGA to mass storage device
For a project I am working on I need to transfer, without loss of information, continous data bursts at a maximum of 48 MB/s from an FPGA to a mass storage device.
An SD card device (with appropriate ...
- 101
-1
votes
2
answers
165
views
Is only a firmware limitation the fact that some camera can't store photo in RAW format? [closed]
I was interested in understanding if from the point of electrical engineering storing the RAW data of the sensor directly into the memory of the camera require special hardware. Could be more ...
- 326
0
votes
4
answers
280
views
How did old games from 8-bit era game consoles store music? [closed]
Some time ago I found that the audio of a game called Ninja Gaiden 1 (NES) is around 1 hour. This is excluding the sound effects like jump and hit e.t.c. Then I found that the entire game size is ...
- 11.4k
2
votes
2
answers
548
views
I've seen many conflicting answers online: For optical storage, does a pit represent a '1' bit or does a land represent a '1' bit?
I've seen many conflicting answers online so:
When reading an optical disk, which one of these is true:
A 'pit' represents 1 and a 'land' represents 0
or
A 'pit' represents 0 and a 'land' ...
- 123
0
votes
1
answer
375
views
How to convert raw radar sensor data into custom compressed data format for efficiently storing and archiving on file system
The binary raw data from the SAR sensor is processed in fpga and outputted as hex. Now, this data we currently store as ASCII in .txt files. However, it takes lots of space in storing.
Is there an ...
0
votes
0
answers
46
views
Flash storage: How do I know the remaining writing cycles without relying on SMART?
Flash storage such as SSD has a SMART system like HDDs.
But USB sticks and SD cards lack that.
Optical storage has error/quality scanning that can predict failures early, while error correction is ...
- 742
6
votes
2
answers
2k
views
Flash storage: Limited read cycles?
Comment from http://electronics.stackexchange.com/questions/356185/nand-flash-retention-using-usb-charger/356190?noredirect=1#comment855287_356190 claims that reading from flash storage is no lossless ...
- 742
4
votes
2
answers
384
views
How does a CD or DVD burner produce submicron lines separated by submicron distances?
What mechanism(s) are used to achieve repeatable submicron spacing between concentric tracks in a DVD, CD, or other optical writer? I want to understand the minimal set of hardware used to achieve ...
- 473
1
vote
1
answer
819
views
Is it possible to read the memory from a Holtek HT46R064B OTP(!) chip?
I am trying to get data from a Holtek HT46R064B. I know that the Chip is an OTP (One-Time Programmable) Chip. I ask myself if it is possible to read some parts of its memory.
In my case the chip is ...
- 11
1
vote
2
answers
505
views
Is it possible to design a SD 3.0 controller in UHS-ii/uhs-i mode using simplified specifications?
I've been for while looking at how to store sampled data up to a rate of 30MBytes/s; an SD 3.0 host controller core in uhs-ii/uhs-i mode fits the requirements.
I'm not planning to buy the SD full spec ...
- 13
6
votes
2
answers
1k
views
Fake a panasonic battery to revive camera to copy photos from internal memory
Got this camera from a friend, battery door broken, no cables, no battery. There are some important photo's on this camera that I want to copy from internal memory to SD card. We first want to try ...
- 1,317
18
votes
2
answers
4k
views
Why are NOR flashes still used when NAND flashes have a bigger size?
I've seen a few systems that uses a NOR flash to boot from, and a NAND for a bigger filesystem. I've also seen a system with only NAND gets corrupted after files being written to and verified correct.
...
- 535
0
votes
1
answer
1k
views
What data is stored in an eeprom that’s not in the flash memory? [closed]
I’m wondering generally what information is stored in an eeprom that’s different than what’s in the flash drive that contains firmware?
Mostly in mobile devices. Does the eeprom contain user settings ...
- 191
0
votes
2
answers
587
views
CPU-Multiplier Overclocking causing (silent) data corruption?
There have been a large number of threads regarding CPU overclocking and damage to electrical components in the past. Mostly, however, these questions were directed at how increased voltage and the ...
- 147
0
votes
1
answer
240
views
Is there any kind of backup for the data that is deleted during NAND flash block erase? [closed]
In NAND Flash, the whole block is erased.How is the data in that block that is not intended to be erased, gets recovered after it is erased? Is there some kind of Flash Memory Management Unit that ...
0
votes
2
answers
249
views
Datalogger storage calculation
How to calculate the required storage capacity of a data logger given the measurement time sampling rate and resolution?
I want to log two voltages at 1Hz rate for 3 months continuously and looking ...
- 1,725
3
votes
1
answer
462
views
Save data on sim card using micro-controller
SIM cards come in various data capacities, from 8 KB to at least 256 KB. All allow a maximum of 250 contacts to be stored on the SIM,
Is it possible to save data (other then contacts) in sim card, ...
- 45
3
votes
3
answers
5k
views
Why optical disk CD/DVD use spiral tracks, as opposed to cocentric tracks used in hard disks and floppy disks?
I'm not sure this is the community in which should I ask this question, if it isn't, I'm willing to transfer it.
According to this article:
Track positioning also follows two different methods ...
- 147
2
votes
2
answers
98
views
Preserving state of variables in RAM on Power Failure
I'm developing a code with Nuc240(ARM Cortex M0) Microcontroller.
Where I need to store the value in some of the variables to the Internal Data Flash.
I use ISP procedure for this, but i have seen the ...
0
votes
2
answers
131
views
physical 0 and 1 signals in communication and storage systems
How are 0 and 1 signals actually encoded in today's communication and storage systems? Would their actual encoding cost the same or differently? My intuitive guess is that there must always be some ...
1
vote
1
answer
2k
views
Using STM32 to transfer a file via bluetooth
So far I have been doing projects with Arduino, RPi, ATtiny etc. But now I have project in mind where these things doesnt seem to suit. I need your help.
OK, now on the project:
I have a file on my ...
- 63
0
votes
2
answers
246
views
Design Question: 20 MS/s data acquisition
Let me preface that I am fairly new at working with sampling high speed signals. Specifically, I want to do some processing on slightly corrupt NTSC signals. For this, I need to sample at above 14.3 ...
- 469
5
votes
2
answers
2k
views
Refreshing flash memories. Does it work?
We all know that the flash memories have data retention time of around 10..20 years.
But what if we need to design a device that has to work for 1000 years?
The obvious solution is to make a flash ...
- 5,307
0
votes
1
answer
710
views
Write operations on eMMC chip (not SPI) with data incoming from MCU
I'm working on integrating an eMMC ship to a FPGA.
As for now, the initialization is working fine, I've managed to receive the CSD and CID registers properly, and I can select and move the chip to ...
- 298
11
votes
1
answer
6k
views
SPI data storage devices: (micro)SD card, DataFlash, or serial EEPROM?
I am revisiting some of my design habits, and one of them is under serious scrutiny: the go-to SPI-based storage device is (micro)SD cards, for their price-to-capacity ratio and generally higher ...
- 2,863
0
votes
1
answer
573
views
Record video from webcam w/o microcontroller [closed]
I managed to salvage a webcam from a broken laptop, and I'm looking to use it to record video in a small package to attach to a rocket. However, I need to record the video to some data medium like a ...
