How data transferred from HDD to RAM?

Question

1.00/5 (1 vote)

See more:

As we know that what are the things in the RAM are taken by the Processor to RUN. Who takes up the task of putting the data from HDD to RAM. Is it CPU? If yes It means again the Processor will do that task? I am bit confused can any on explain?

Thanks in Advance

What I have tried:

As we know that what are the things in the RAM are taken by the Processor to RUN. Who takes up the task of putting the data from HDD to RAM. Is it CPU? If yes It means again the Processor will do that task? I am bit confused can any on explain?

Thanks in Advance

Posted 3-Apr-16 0:11am

MYQueries1

Updated 3-Apr-16 1:00am

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2016-04-03T01:00:00

Physically? Loads of things, including a whole number of other processors...
The HDD data itself is stored in magnetic bits, which are read by a magnetic head which floats a tiny distance above the surface of a spinning disk: small changes in the magnetism of the disk surface are detected by the head and interpreted as ones and zeros. (There is usually at least one processor involved here)
The ones and zeros are organised into bytes, sectors, and tracks which are built up into a RAM buffer inside the HDD (by another processor, quite often) and transferred onto a databus (PATA or SATA normally) as requested where they are picked up (by yet another processor) and passed to the CPU for storage in RAM by driver software which reads it from the interface buffer.

Complicated? Yes. Horribly complicated when you get right down to it (and there is a lot more complication if you start going into the details - that is just a simplified, "glossed over" version of what happens). If you want more details, then start here: How Hard Disks Work | HowStuffWorks[^]
Then move on to this overview: Everything You Need to Know About Serial ATA - Hardware Secrets[^] before startign to goolge for some of the details!

But as far as your app is concerned: File.ReadAllBytes will do it all for you! :laugh:

Kornfeld Eliyahu Peter · Answer 2 · 2016-04-03T00:44:00

Solution 1

What loads data from the storage (disk) to the memory is your application...
When you are opening a file and do some read process, you actually load some of that file into a memory structure...
The CPU by itself can not access the storage, but only the memory...

Posted 3-Apr-16 0:44am

Kornfeld Eliyahu Peter

Comments

MYQueries1 3-Apr-16 6:49am

Which component helps in loading that file into the memory?

Kornfeld Eliyahu Peter 3-Apr-16 7:08am

The disk controller unit - which accessed by the driver (or low level BIOS too) from the OS and your application talks to that driver from the code according to the language you are using...