Questions tagged [hdd]

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Laptop showing boot menu, with no HDD detected [migrated]

My laptop when turned on, is showing the boot menu and is only detecting the CD drive. But if I reboot, it turns of perfectly well. This problem keeps arising randomly at any moment. Does anybody know ...
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2answers
51 views

What HDD‘s to look out for to source strongest voice coils? [closed]

This question is pretty niche, but maybe someone investigated this topic before me and can give advice. I want to source voice coils from HDDs (new or second hand ones). The more torque/force the ...
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0answers
84 views

What kind of material is this and what is the purpose of this?

In 500 GB or higher capacity HDD's, you can frequently find these black things (see photo below). It is made from a very weird feeling material. It is not made of plastic, it has a dull glass sound ...
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3answers
334 views

Are these 12v power supplies worth using? Is additional circuitry needed to drop voltage to meet USB standards?

I have these two power bricks I want to convert one of them to power a Banana Pi and 3.5 HDD. https://imgur.com/a/qJn1q I want to determine if either is safe and the needed circuit modifications to ...
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1answer
145 views

Turning on PC PSU with current or bridging PS_ON and COM/GND?

I really hope title is specific enough. What I am trying to achieve is that using a SATA Extension Cable to PS4 you can plug in a 15mm 2.5" Laptop Drive or 3.5" Desktop Drive and the issue is that ...
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0answers
24 views

How to use a HDD read/write head to read micro-magnetic fields?

Someone can tell me if Is possible to create an external circuit using the HDD Head Read/Write like a sensor, to read micro-magnetic fields? Can I remove the HDD head and control this?
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1answer
149 views

Powering 64 SATA HDD from Single ATX Power Supply

I am planning to wire a 4U DIY JBOD top loader. Looking at the power output of several power supplies they have a a maximum rated 5v rail of 100-125w. By looking at the spec sheet of my chosen HDD I'...
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4answers
132 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 ...
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1answer
99 views

Make powered USB Cable for External hard-drive

We purchased a 2.5" Seagate external hard drive. For power and data transfer it has a USB 3.0 cable, like this Amazon USB Cable. It works great on the USB 3.0 ports on the PC but the Smart TV does ...
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0answers
604 views

Is there any way to run an IDE HDD motor with the circuit board attached to it?

I have an old WD 40GB IDE HDD motor and its circuit board with me. Is it possible to run the motor with a battery with the circuit board attached along with it? I can post a picture of the circuit ...
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3answers
93 views

Hard Disk Drive Storage Space [closed]

I have been wondering for sometime now why Hard Disk Drives define storage space in thousands (1000) instead of the real (1024). So, for example, 1GB = 1000MB; 1MB = 1000KB. Is there any significance ...
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1answer
92 views

How to access the data stored in HDD? [closed]

I removed the HDD from my broken labtop to take the data stored in. This is the HDD: I don''t know which cable I can use to connect it with my new laptop with USB port . Could any one explain ...
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1answer
2k views

How to sense RPM from 4 pin BLDC motor?

The title says it all. I'm doing a project with a spinning HDD disk with a slot cut in it, RGB LEDs, and precise turning on and off of the colors. I'm planning to glue a magnet and use a hall ...
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0answers
1k views

How to use L293D to spin HDD motor FAST?

Short version: I have a HDD motor I want to spin. I have the L293D chip and after hours of fiddling with code and timing, can only achieve 1200 RPM. How can I get more out of it? Long version: I have ...
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1answer
104 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 ...
1
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1answer
713 views

What determines the maximum rotational speed of a hard disk drive?

Through my background research I understand that the limit on the rotation of a hdd is largely the product of heat and the specs of the physical disk, but I am puzzled by the round numbers advertised ...
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1answer
643 views

Slimline SATA adapters

I've been lurking around the net for days trying to find a Slimline SATA to mSATA\microSATA adapter, the only one remotely related is the laptop optical bay HDD\SSD enclosure which I already have and ...
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1answer
215 views

USB Hub bandwidth problem [closed]

I will use a Beaglebone Black with a powered USB Hub to control a USB Microphone (PCM2912A) and a USB HDD. The task consists in recording and writing the Audio directly into the HDD... Will I have ...
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2answers
216 views

What is the biggest stable memory overhead for SSDs?

With an HDD, the largest overhead in accessing stable memory (where we measure access time from the moment the instruction passes the MEM stage in the pipeline) is the I/O costs for seeking the right ...
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1answer
295 views

What is the maximum magnetic flux density a HDD can tolerate before data is corrupted?

Does anyone have hard numbers explaining the maximum number of Teslas a hard disk drive can tolerate before data will be corrupted. This forum says "a lot", which isn't super helpful. This one ...
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0answers
2k views

How to save electronic equipment from ants? [closed]

Today I brought out my external HDD and it was full of red ants. It took me an hour to remove the ants (it seems quite impossible to remove all of them; some are still inside). I always see some ants ...
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1answer
1k views

Should all SATA HDDs spin up without SATA cable? [closed]

I've got a Western Digital WD3200AAJS HDD and am trying to spin it up (I don't really need it as an HDD, I need just its motor to work). After connecting the power cord it didn't spin up, so I am in ...
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5answers
2k views

Of the two - which is the better archival media - Standard HDD or Flash

There are two totally different "bit rot" mechanisms in place here in the two technologies, so which would be expected to last longer? Which is inherently superior for archival purposes. Will a ...