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Questions tagged [ssd]

Acronym for "Solid-State Drive" or "Solid-State Disk". SSDs are hard-drives that use semiconductors or DRAM to store data, usually NAND flash memory, rather than spinning magnetic disks.

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Is SSD wear-leveling affected by how much logical space you have left? [closed]

I've always been told that you should leave at least 20% of the SSD free because if you leave too little space in there, it's gonna wear off as it doesn't have a lot of space to work with. I do know ...
WaveCave's user avatar
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2 answers
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Do extra PCIe lanes improve latency?

If you connect a NVME SSD to a PCIe x4 slot it will have a higher maximum bandwith than if you connect it to a 1x or 2x slot. So logically it will transfer large files faster. But if you never need ...
Maestro's user avatar
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What is the typical NVME SSD abrubt shutdown reaction time for a CC.SHN event until power loss?

The NVME standard under "7.6.2 Shutdown" defines the procedure for an abrupt shutdown event: ...
mnemocron's user avatar
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how to extend usb c cable (usb 3)

its look like this qus is simple but its not at all see here what i did i have m1 air base model, and i have lack of capacity, its only 256 so i thought i need more space so i thought why not put m.2 ...
AbdAlgani's user avatar
1 vote
1 answer
251 views

Searching for a replacement part for an SSD repair

I broke my SSD after applying 28 V and I have to change the component by the red arrows in the picture. The component is marked "FNC1B" and it is QFN10 package. It should be a MOSFET or an ...
123 456's user avatar
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1 vote
1 answer
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SSD with Phison PS3111 controller repairing [closed]

I broke my SSD after applying 28 V and I am trying to repair it. But need a description of a component that is marked red in the image. I guess it is a fuse or something like that. Could anybody ...
123 456's user avatar
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0 votes
1 answer
2k views

Designing M.2 socket for SSD

I'm designing a card adaptor which converts from M.2 Key E type to M.2 Key M type (to insert an NVMe SSD into a port designed originally for Wifi cards). I found some reference design for the M.2 KeyM ...
Daniel's user avatar
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Wiring M.2 E to M - switching differential lanes is normal?

I managed to run an M.2 SSD (Samsung PM991A) in a TypeE socket with an adapter designed by CRImier (thank you): I wish to design my own board with similar functionality, and I can't understand one ...
Daniel's user avatar
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1 answer
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Second PCIe on KeyE M.2?

Based on this online resource, KeyE M.2 has 2x PCIe x1 / USB 2.0 / I2C / SDIO / UART / PCM Their pinout table shows these lanes (for E-key): ...
Daniel's user avatar
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1 vote
1 answer
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M.2 SSD inserted into E slot

I managed to run an M.2 SSD (Samsung PM991A) in a TypeE socket with an adapter designed by CRImier (thank you): This card can be fit into an E slot, and can host an SSD (M type). My Linux is ...
Daniel's user avatar
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Some chips (probably DRAM) on NVMe SSD are lower than others, resulting heatsink having no contact with those chips after installation

I believe most of the NVMe SSD heatsinks' contact surface is just one flat piece, but not all the chips on the NVMe SSDs have the same height. From my recent observation, there are air gaps between ...
Sij's user avatar
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2 answers
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Faulty address line [closed]

how to find address line fault in microcontroller if microcontroller connected to external memory through address line? if given one line in address is faulty how to pinpoint the particular line ...
Mentee's user avatar
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2 votes
2 answers
838 views

Utility of shielding a laptop SSD with conductive foil -?

I recently replaced the factory SSD in my Thinkpad X260. The factory SSD came with one side covered in conductive aluminum foil which is grounded to the chassis via the caddy-screw attachment. The ...
Russ Bain's user avatar
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3 votes
2 answers
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M2 Key E - can it host an NVMe SSD?

I found an SBC which has an M2 socket for WiFi cards. It's keying is E. I couldn't decide whether I can plug an M2 NVMe SSD into this socket. Key E normally has PCIe x2, which is not as fast as PCIe ...
Daniel's user avatar
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3 answers
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Why don't WD NVMe SSDs have PCIe AC coupling capacitors?

I see no coupling capacitors on PCIE TX lanes. Is it Safe to Remove Coupling Capacitors? Or Is it possible to make capacitors into the chip? Add more photos:
Jue WANG's user avatar
2 votes
1 answer
674 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 ...
CoastCity Lapse 00crashtest's user avatar
2 votes
2 answers
507 views

How do drives deal with user overwriting data?

Let's say I create a text file and write "Hello world!" to it. I stick with the default 4096 byte allocation size (assuming NTFS file system). I wonder what happens when I change (overwrite) ...
YepNope's user avatar
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1 vote
0 answers
1k views

LED status for 2.5" SSD NVME

I'm making a PCB for the NVME SSD connector, and I want to put a status LED on it, but I didn't find much info about it. I found a pinout, and one of the pins is called activity (P11). I thought it ...
jose miguel cañete hidalgo's user avatar
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1 answer
631 views

Will a 4 lane PCIe device work if plugged into a PCIe socket the only 1 lane electrically connected

I am designing a motherboard that uses a SMARC format plugin card for the CPU. This card is based on an Intel Atom x6413E CPU. The SMARC CPU card has various interfaces available, including USB2.0, ...
Simon Bagley's user avatar
1 vote
1 answer
2k 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 ...
kp122's user avatar
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Is it possible for an SoC to have a built-in SSD?

Is it possible to have an SoC that includes an SSD on-chip, or are there technical constraints that prevent that? What are those technical constraints, if any?
steventrouble's user avatar
0 votes
2 answers
81 views

How do SSD manufacturers gain competitive advantage? [closed]

Most SSD manufacturers (with some notable exceptions such as Samsung) just use off-the-shelf controllers and off-the-shelf NAND in their products. How do these SSD companies get competitive advantage? ...
daikin's user avatar
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1 answer
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SSD lifespan is often expressed in terms of TBW (Terabytes Written), does that include read cycles?

Is it so that read/data-fetch cycles don't have any effect on the memory wear and the program-erase cycles are only related to the amount/number of times of write/erase operations? Here I consider ...
lousycoder's user avatar
2 votes
2 answers
1k views

What is the exact position of the M2 fastener screw's base on the PCB from the slot for 2280 SSD?

I am designing a PCB that uses NVMe m.2 2280 M-Key SSD. I would like to know what is the exact position of the SSD's screw will be located with respect to the SSD slot. The slot that I am using is ...
Boovaragan's user avatar
3 votes
1 answer
1k views

How to add embedded mounting hole screw for the NVMe ssd in a PCB?

I am designing a PCB for CM4 where an NVMe SSD M.2 2280 will be used. I need to add the screw terminal/mounting hole fused into the PCB (ref the image: https://www.corsair.com/corsairmedia/sys_master/...
Boovaragan's user avatar
2 votes
0 answers
34 views

Trying to Identify Static or Thermal Transfer Tape

I came accross this solidstate drive which is in a custom plasic and metal enclosure. There is a sheet of material cut out between the metal top and the drive. I'm trying to figure out what it is, it'...
pneveu's user avatar
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1 vote
0 answers
113 views

SATA 3 to M.2 conversion

I'm designing a PCB that should (among other things) include an M.2 SSD slot and convert that to a SATA slot to be connected to a computer. I considered just soldering a commercial SATA-M.2-adapter ...
cat_in_the_chat's user avatar
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0 answers
46 views

Component identification, Trascend SSD340

i have a broken SSD, one component burned up because of the power source of the computer and I can't identify it in order to get a new one and fix the SSD, the component is U23 in the picture. The ...
SkyZervi's user avatar
1 vote
0 answers
2k views

Repairing an SSD using a soldering iron vs oven reflow?

I'm trying to recover data from a cheap kingspec ssd that stopped working some months ago. It is not recognized by the computer at all. I get some messages saying the computer is trying to connect to ...
Meruje's user avatar
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6 votes
3 answers
6k views

Does cooling the NAND chips on an SSD negatively affect its reliability?

The problem of heat dissipation in high-performance, small form-factor SSDs is well-known, for example, the paper Transient Thermal Analysis for M.2 SSD Thermal Throttling published in 2018 17th IEEE ...
比尔盖子's user avatar
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0 votes
1 answer
60 views

Does a secure erase on a SSD with lots of free space cost less P/E cycles than an SSD that's almost full?

Doing an ATA Secure Erase on an SSD should reset all of the cells to factory condition, which results in a program/erase cycle on cells at least in blocks that contain data. On self-encrypting drives,...
Victor's user avatar
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-1 votes
1 answer
202 views

MLC NAND Flash page interleaving

I'm trying to understand the pattern used for page interleaving on word lines in MLC flash. I've come across a number of resources that show how even-odd paging works in detail, but the few examples ...
Onofog's user avatar
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0 answers
179 views

What are the physical limitations of a SSD drive for long term cold storage?

As I understand it, SSD drives do not suffer mechanical failures, but are subject to a finite number of writes before failing. I have stored mechanical drives for 5+ years and have been able to ...
gatorback's user avatar
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-3 votes
1 answer
260 views

Why must a block in NAND SSDs be erased before it can be reprogammed? [closed]

Before programming a NAND based SSD in page-level we have to always erase by block-level which increases write amplification. why is it so and how do we mitigate it? what is the necessity of erasing ...
tam_7922's user avatar
3 votes
1 answer
647 views

M.2 PCIe x2 and SATA connections and key/notch with SATA/PCIe x4 SSDs

For my current project I am adding an M.2 slot for additional storage. Even though SATA data throughput is more than sufficient I would like to support both SATA and PCIe based SSDs, as I dont know ...
L. Heinrichs's user avatar
0 votes
2 answers
522 views

What design differences make ram faster than ssd for read/write [closed]

I understand that RAM is connected directly to the CPU via a high bandwidth bus, and SSD is a peripheral, but my assumption is that there are also electrical design differences (e.g. memory cell ...
JBaczuk's user avatar
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2 votes
2 answers
4k views

Are SSDs true random-access devices?

Since all kinds of flash memories feature different transfer rates according to the kind of operation performed at a given moment (e.g., random access reads versus random access writes, random access ...
Humberto Fioravante Ferro's user avatar
1 vote
1 answer
1k views

Possible to replace worn out NAND chips in solid state drives?

I understand that SSD endurance is typically much greater than advertised and disregarding any form of data recovery, is it possible to replace NAND chips in solid state drives (with the exact same ...
Ferdia McKeogh's user avatar
1 vote
4 answers
463 views

Do you need to perform an erase before a write with a HDD?

A simple question, the answer to which is surprisingly difficult to find. Does the internal controller in a HDD have to erase a sector on the hard drive if it already contains information, before it ...
genericpurpleturtle's user avatar
1 vote
2 answers
348 views

SYNC Escape in SATA

I have a FPGA in which I have implemented SATA Host and a SSD as the device. The communication b/w them is occuring at SATA 3.0(6 Gbps). I have a situation in which during write transaction I receive ...
Tapojyoti Mandal's user avatar
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0 answers
653 views

Extremely high temperature on SSD

I've got an SM941 SSD and it became dead after shutdown while writing data. I decided to use up the nand flashes on it to DIY a new SSD. Then I get an controller board(SM2246EN) with NGFF size, SATA ...
user123179's user avatar
2 votes
1 answer
533 views

SATA Link layer Idle state primitive synchronization failure

I am currently working on interacting with SSD memory through a FPGA using SATA protocol. I am using a Xilinx KC705 evaluation board and SSD is from Samsung. I have connected the SSD device to the ...
Tapojyoti Mandal's user avatar
0 votes
1 answer
90 views

Removeable board sized ssd

Me and my friends are starting work on a small robotics product. We are just starting out in product creation, and were wondering how to transfer our programming to the bot's ssd. We realize we can ...
KeeganDeathman's user avatar
0 votes
1 answer
185 views

Designing Or Customizing A HDD/SSD Logic Controller

I read this post which answered most of my questions, but was a bit disheartening. So, this one may need to be deleted. I have also done my other research looking through articles like this. Is it ...
user58446's user avatar
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3 votes
1 answer
599 views

Why erasing SSDs in increments of entire blocks does not damage adjacent cells?

I know that to avoid corruption and damage, SSDs are only erased in increments of entire blocks. But how does that not damage adjacent cells? Why energy-intensive tunneling inhibition isn't necessary ...
Wardruna's user avatar