For the basic this video is fine I guess. He forgot to mention that the bottom surface is called the servo disk and data is never stored here only sector address location or the header portion depending on the format of the disk. So the address of each sector and format is on this bottom plate. The hard drive also has a memory that stores these addresses and converts them into differential current that drives the heads to almost a direct hit in the desired location before a read sector address is even initiated. To have physical sector size almost the same the most inner of the disk and the most outer portions of the disk are not used, these empty spots are used for landing of the heads.
Excellent explanation! As a constructive comment, I would say to add a little more detail and clarity around the concept of cylinders. Why they are needed, the problems it solves and why the heads move together and cannot read and write at the same time simultaneously. I say all this, as I myself am not clear on this. Again fantastic explanation. The educational aspect is surely the best characteristic of UA-cam. Yoir video is one of thise that will keep teaching people for years, contributing to their lives.
Well explained! However, something is not clear to me yet. Let's assume I want to read a file on my HDD which has 5 platters. Let's also assume the file is perfectly distributed on one cylinder only. Would I then still need cylinder "jumps" after every five read/write head adjustments? Or is reading out the entire file possible merely with read/write-head switches? My idea of the pattern: H -> H -> H-> H-> H-> C -> H -> H -> H-> H-> H -> C ... etc. until my file has been read? (H := read/write-head switch, C := cylinder jump)
To people watching. This video is missing some very important information about space gaping, which is essential to learn to understand data recovery & deletion, and also to understand how sector size correlate with bigger/smaller sectors.
Thank you, sir one thing troubles me though, how exactly is the start of a certain sector is recognized if all information is alike? I mean, isn't there a possibility DATA could be mistook for HEADER if there is nothing separating sectors ? also , don't you think tracks that are larger containing the same number of sectors as the smaller tracks is just a waste of space?
I believe, disk access time = seek time+ rotational latency + transfer time. But in this video terms seem to be confused. References: cseweb.ucsd.edu/classes/wi01/cse102/sol2.pdf
Great Work @Abelardo Pardo ! You have explained everything in 11 mins. You are far better than our teachers OR any Book. What do you say ?
Fully agree
Thank you Abelardo for this beautiful work.
The way you explain, it is truly wonderful. You are the best teacher!
Thank you!!!!!!!!! So much! I go to one of the top 10 public universities in the U.S. and you explained it 100 times better than my professor.
By it I mean cylinders. I had no clue what they were.
For the basic this video is fine I guess. He forgot to mention that the bottom surface is called the servo disk and data is never stored here only sector address location or the header portion depending on the format of the disk. So the address of each sector and format is on this bottom plate. The hard drive also has a memory that stores these addresses and converts them into differential current that drives the heads to almost a direct hit in the desired location before a read sector address is even initiated. To have physical sector size almost the same the most inner of the disk and the most outer portions of the disk are not used, these empty spots are used for landing of the heads.
Excellent explanation! As a constructive comment, I would say to add a little more detail and clarity around the concept of cylinders. Why they are needed, the problems it solves and why the heads move together and cannot read and write at the same time simultaneously. I say all this, as I myself am not clear on this. Again fantastic explanation. The educational aspect is surely the best characteristic of UA-cam. Yoir video is one of thise that will keep teaching people for years, contributing to their lives.
Well explained! However, something is not clear to me yet. Let's assume I want to read a file on my HDD which has 5 platters. Let's also assume the file is perfectly distributed on one cylinder only. Would I then still need cylinder "jumps" after every five read/write head adjustments? Or is reading out the entire file possible merely with read/write-head switches?
My idea of the pattern: H -> H -> H-> H-> H-> C -> H -> H -> H-> H-> H -> C ... etc. until my file has been read? (H := read/write-head switch, C := cylinder jump)
wow .. it's been 10 years but still it's helpful
Hi
Excellent explanations. Some concepts were pending until now.
Thanks for sharing.
Regards
To people watching. This video is missing some very important information about space gaping, which is essential to learn to understand data recovery & deletion, and also to understand how sector size correlate with bigger/smaller sectors.
Great explanation! You made that so easy to understand. Thank you!
nice video
Gracious amigo from GODAVARIKHANI TELANGANA
Omg you so good at explaining thing bravo and thanks you amazing!!!
Perfect !! Thank you from istanbul / Turkey
Thank you, sir
one thing troubles me though, how exactly is the start of a certain sector is recognized if all information is alike? I mean, isn't there a possibility DATA could be mistook for HEADER if there is nothing separating sectors ?
also , don't you think tracks that are larger containing the same number of sectors as the smaller tracks is just a waste of space?
Someone can answer that lol ??
One doubt sir!
When the tape head moves towards the right track does the disk still keep rotating or it waits till the head is positioned correctly
Great job sir. Love from india❤️❤️❤️
Beautiful Video..
Keep posting many like those ..
100 thumbs up..
Thanks a lot for the video, it was really useful!
Amazing explanation!
excellent explanation.👏👏..tqq u sir thz helped me a lot in knowing clear abt wt is cylinder, traks nd sectors..
a sector farther to the centor is larger than a sector nearer, and they still holds the same amout of bytes of data?
I'm looking at some models whose designs seems like it was based on a mandala which looks very similar to the hard disk or the magnetic disk.
Bravo! Thank you sir.
Thank you. Nice and simple explanation.
I have a Question.Information is not physical in nature then how it remain stored after power is turned off.???
Really nice and informative
Thank you very much! BEAUTIFUL!
good video..keep uploading
Thank you so much!
Thank you, It was great!
Nice explanation.will be more informative for example calculations.
GREAT EXPLAINATION...KEEP IT UP...!!!
Sir...is this completes the disk structure of file system?
brilliant!!!
Nicely Explained. Thank you sir
thnx frm INDIA
Good job!!
*explanation
Brilliant explanation
Helps very much. Thanks.
very clear explanation. Thank you
Great✨
thank you sir that was fantastic.
Thank you it help me a lot in Linux Base device and system
Very clearly explained.
Grazie Signore
Thank you for your clear explanation, Sir ^_^
Brilliant and Excellent Nice but add Some Example
Thank you so much
Nice Explanation
thanks sir I am from Pakistan
Thankyou so much for sharing this
Thanks!
helpfull video
Why is the 3600 RPM inversed?
It is done to find the time taken for one rotation and then multiplied by 60 to convert it into seconds
thankyou so much 😊
Awesome
I believe, disk access time = seek time+ rotational latency + transfer time.
But in this video terms seem to be confused.
References: cseweb.ucsd.edu/classes/wi01/cse102/sol2.pdf
2:15 Isn't that called a "block"?
Sector nothing but a block
In india we says ............" DHASSSSUUUUUU" sir :) thank you
Please add CHS addressing to this video .
thanks
your voice is not clear enough but the information was useful
The data stored in Hard Disk can be directly accessible by processor * yes or no
No
Most of times I didn't get your words...
Sir please Hindi me explain
Please explain in Hindi
lmaooooooo
american english is difficult to understand to indians altough they know english
Thank you so much!