Windows 10: Getting 18-22 mBps while transferring any data in the same hard drive

its a Seagate 2TB 5900 rpm drive. Model no. is ST2000VM002-9UY166 2000.3 GB.
Whenever I start transferring, I get about 70-80 mBps for the first few seconds but then it drops down to a constant 18-22mBps.
I am not copying huge amounts of small files. I am copying individual big videos or iso files.
The task manager shows about 50 mBps at 100% disk usage as I am writing and reading from the same disk. I used crystaldisk mark 5 and I got significantly better results. The results are shown below.






I guess I am having this problem since I bought it just a few weeks ago.

I have an external usb 3.0 hard drive and I get about 40 mBps read as well as write speed on it. It doesn't matter if I connect it to a usb 3 port or usb 2 port.

I checked for the DMA thing but I couldn't find any channels in the IDE ATA/ATAPI controllers section. I just see controller for my hard drive.
I tried searching for some related stuff in bios but all I found was that my hard drive was set to AHCL mode or whatever it is.
I even tried changing the sata port to which the hard drive was connected in my motherboard.
The results of crystaldisk info are shown below-



Any help would be highly appreciated.

:)

 

NOKIA N95 HSDPA MODEM DRIVER The TRUTH

Hi all,

Ok i worked very hard to learn how to write a driver & i am very close of releasing a Nokia N95 driver which will show 3.6 Mbps in the connection speed.

Still a lot of People are confused with the HSDPA connectivity and talking about the connection downstream/upload speed /download rate etc (the network speed)

I am talking about the speed of data which travels between Nokia N95 HSDPA modem and Computer (port ) running on any Microsoft OS.

I want to thank sbak for looking & researching for editing the driver in windows registry >sbak is the only person who understands the concept.

I am trying to develop this driver because N95 is such a Hi tech device of its time but with poor written driver and i like it a lot & Nokia N96 will hit the market soon. Also this problem is seen in many other HSDPA phones which connect to computer VIA USB
2.0 but not in HSDPA express or standard PCMCIA cards because they act like a network card.

Ok a little explanation again so you guys can better understand the concept.

1: If you guys want to check the connection speed of N95 HSDPA with the cellular pole of your cell provider then the best site is
Flash Speedtest.net by Ookla - The Global Broadband Speed Test and its global which means you can check your speed from any where in the world. Now this speed will tell you the download speed you are getting from your cellular ISP server
& up to what speed you can upload the data or send the data to the ISP server. (This is another topic).

2: Now lets say your Nokia N95 HSDPA is connected to the cell pole at 3.6 Mbps which will mean you are getting download speed near about 3.6 Mbps(3600000 bps){ 439.45 KBps }& upload is always near half or less of download speed.

Ok I will explain what is the function of a driver related to this topic.

A driver is a communicator between N95 HSDPA modem & Computer or in other words you can say it is the middle man which deals with the transfer rate of the data between Hardware (modem) & Computer (hardware /software)

An example is as follow if the connection between Nokia N95 HSDPA & cellular pole has a download speed of 3.6Mbps and the data downloaded from the Cellular ISP has to be stored on the Hard disk of the computer then how it will affect the delay of data due to
the Nokia N95 HSDPA driver.

Nokia has written the N95 HSDPA modem driver to transfer data maximum at 921600bps = 921.6 Kbps to the computer. This means that when the Nokia N95 HSDPA modem is getting 3.6 Mbps from the cellular pole, it is transferring data to Computer at only 921.6 Kbps
so when the data reaches RAM to be processed by CPU & stored onto the Hard disk then it is converted into Bytes. So if we convert 921.6 Kbps to Kilobytes = 112.5 KBps.

Explanation HSDPA speed = 3.6 Mbps (3600000 bps) minus 921.6 Kbps (921600 bps) = 2.678 Mbps (326.95 KBps)

So data is 2.6784 Mbps late to reach the Hard drive of the computer because of the bad written driver or in other word 326.95 Kbps of data is written late on the Hard drive because of the Nokia N95 HSDPA USB driver.

This problem is easily fixable if one can change the maximum speed bps from 921600bps (921.6 Kbps) to 3600000bps (3.6 Mbps) in the Nokia N95 HSDPA modem driver but that is the hardest part which i am working on.

Nokia N95 connects to computer via a USB 2.0 cable which is capable of transferring the data at 480 Mbps which is much higher than 3.6 Mbps.

Conclusion:

I am talking about the transfer and connection speed of data between Nokia N95 HSDPA USB modem and computer not the connection/transfer speed of Nokia N95 HSDPA USB modem and the cellular pole.

Transfer rate between N95 HSDPA modem & cellular pole is not a issue.

USB 2.0 cable carrying/transferring the data at 480 Mbps is not a issue.

But when the driver of the Nokia N95 HSDPA modem forwards the data to the opened com port of windows which is allocated to Nokia N95 HSDPA , it only transfers the data at the speed of 921600 bps (921.6 Kbps) which is a problem .

Soon a custom built driver will prove it.

Please feel free to comment on this topic.

Regards

Mansoor.

 

Data transfer is very slow

Yes i agree 4 mbps is not slow......but in earlier it is up to 18 mbps........from few days onwards it is little bit slow......

And i am transferring movies ( HD 1024 ) in to my flashdrive..........

 

The term of 70-80 mBps may be incorrect, probably is Mbps where small b = bits and capital B = Bytes. There's 8 bits in a Byte, 1024 Bytes in a KiloByte/KB, 1024KiloBytes in a MegaByte/MB, 1024 MB in a Gigabyte/GB and so on. kilobytes to megabytes at DuckDuckGo
The meaning of b and B goes way back in computing, my first experience with it was in the late '80s when first learning about computers.

 

Thanks for your reply.
I know the bits and bytes stuff. I really meant 70-80 megabytes per second. I have only talked in bytes everywhere.
Do you think 70-80 mBps in a 5900 rpm hard disk are not possible? If not then how much do you think is normal?

 

Don't I wish back in MS-DOS and Windows 3.xx days and a 120MB HDD that were true but mechanically I see no way to have had such a large number. Publishing has taken it upon themselves to confuse b with B, see it every day in all types of tech advertising, service manuals, etc.

As far as the drop in speed, we've seen that happen in data transfer whether within a computer, between computers or on the Internet where a download starts strong then drops down. Kinda like the difference between a quarter horse built for a quarter mile run or the 1 and 1/8 mile races for other horse breeds as use in the Kentucky Derby.

 

So do you mean that it is normal?

 

Actually this sounds about right. Think of what you are doing.

Your slow speed is a consequence of reading and writing to same drive.

You are reading data from a drive over one disk data channel, and then writing it elsewhere on same data channel (it is a bit like being on a road where one lane is blocked off and each direction has to access other lane alternately which is obviously much slower made worse as cars have to wait for traffic to start moving from standstill and do not accelerate to normal speed as cars are bunched up).

So at best you can only get half the speed. It is made much worse because disk heads have to keep moving back and forth as well.

Sure you can get high speeds if you were using two drives eg read from ssd on its data channel, and write to hdd on its channel (so data is all one way and head is not bouncing back and forth).

The apparent initial burst of high speed is due to data being buffered but after a short periods buffers are full up.

 

I understand that but don't you think that 18-22mBps is little too low? I got over 100 mBps read as well as write speed in crystal disk mark so technically shouldn't I get about 50mBps even when I am reading and writing in the same disk and over 50 mBps when I am transferring data to/from my external usb 3.0 hard drive?