Question Slow data transfer from MB to external M.2 drive

[i6pwr]

I'm using a Aorus Master X570 MB to transfer video files to an external M.2 NvME drive and Im getting 640 MB/sec transfer rate.

My setup for transfer is:

Video files on the 990 Pro M.2 drive in my PC, USB C out of MB to a Crucial P3 Plus M.2 external drive in USB enclosure. Thoughts on the slow speeds? All input appreciated.

 

[Aeacus]

Thoughts on the slow speeds?

My guess: USB type-C port you have (or the cable itself) are USB 3.0 and not USB 3.1 or 3.2. Since 640 MB/s = ~5 Gbit/s which is max what USB 3.0 can do.

 

[i6pwr]

My guess: USB type-C port you have (or the cable itself) are USB 3.0 and not USB 3.1 or 3.2. Since 640 MB/s = ~5 Gbit/s which is max what USB 3.0 can do.

The port is USB 3.1, cable is a USB 4.

 

[geofelt]

Transfer will proceed at the lowest performing component in the chain.
Video files on the 980 will read quickly, but then needs to cross the usb interface at whatever speed that might be.
Then, later when the external ssd has filled it's buffers the speed will degrade to the ability to fill available nand blocks.
That process is fast on a new drive, but degrades as nand blocks are filled up.

Just a guess, but I suspect a nice 7200rpm HDD would be a good target drive.

 

[i6pwr]

Transfer will proceed at the lowest performing component in the chain

That's what I was looking at. The slowest is the external drive at 3600MB/s write . The 990 is 7450 MB/s read

I would think at least 2000-3000 MB/s transfer speed....not 640.

Both drives are less than half full.

 

[USAFRet]

That's what I was looking at. The slowest is the external drive at 3600MB/s write . The 990 is 7450 MB/s read

Both drives are less than half full.

"slowest device in the chain" includes the connection.
Here, the USB. The port and cable.

 

[geofelt]

The 3600 speed write is a vendor benchmark for a new empty drive where all of the nand blocks are available.
It is a very artificial figure that degrades quickly under load.
Try the experiment using a ssd and a HDD.
You may find that the HDD performance is more consistent and the price per gb of storing video files will be a plus.

 

[i6pwr]

"slowest device in the chain" includes the connection.
Here, the USB. The port and cable.

Are we missing something here?

The USB 3.1 port is good for 5000 MB/s, the cable is good for 10,000 MB/s.

My transfer speed should be in the 2-3 GB range, not 640 MB.

 

[USAFRet]

Are we missing something here?

The USB 3.1 port is good for 5000 MB/s, the cable is good for 10,000 MB/s.

My transfer speed should be in the 2-3 GB range, not 640 MB.

MB vs Mb.
Bytes vs bits.
8:1 ratio.

The 3.1 interface is good for, theoretical max, 5000Mb/sec.
Which equates to ~600MB/sec.

 

[Aeacus]

The USB 3.1 port is good for 5000 MB/s

No, it is not.

USB 3.1 at max, can do 10 Gbit/s which = 1.25 GB/s. No way on hell it can do 5000 MB/s (or 5 GB/s).

 

[i6pwr]

The 3600 speed write is a vendor benchmark for a new empty drive where all of the nand blocks are available.
It is a very artificial figure that degrades quickly under load.
Try the experiment using a ssd and a HDD.
You may find that the HDD performance is more consistent and the price per gb of storing video files will be a plus.

Agreed, but for the most part any drive I've used that's less than maybe 80% has been at or very near advertised speeds.

MB vs Mb.
Bytes vs bits.
8:1 ratio.

The 3.1 interface is good for, theoretical max, 5000Mb/sec.
Which equates to ~600MB/sec.

That's what I've been telling you but you won't listen.....

Wow man.....not sure what I was thinking but it's been a bit (no pun) since I've used external drives for big files...totally spaced on that one.

Thanks man. 👍

 

[USAFRet]

That's what I've been telling you but you won't listen.....

Wow man.....not sure what I was thinking but it's been a bit (no pun) since I've used external drives for big files...totally spaced on that one.

Thanks man. 👍

So all is good?

 

[i6pwr]

So all is good?

Yeah, my bad, half gig transfer not too shabby, I was thinking totally different.

 

[USAFRet]

Yeah, my bad, half gig transfer not too shabby, I was thinking totally different.

The B vs b gets people all the time.

We see that here every single day.

 

[Bob.B]

I'm using a Aorus Master X570 MB to transfer video files to an external M.2 NvME drive and Im getting 640 MB/sec transfer rate.

My setup for transfer is:

Video files on the 990 Pro M.2 drive in my PC, USB C out of MB to a Crucial P3 Plus M.2 external drive in USB enclosure. Thoughts on the slow speeds? All input appreciated.

Post a link to the enclosure.

 

[USAFRet]

Post a link to the enclosure.

There is no "problem".
Everything is working as advertised.

 

[i6pwr]

Post a link to the enclosure.

https://sabrent.com/products/ec-nvme

 

[Bob.B]

https://sabrent.com/products/ec-nvme

The link shows....R/W speed up to 850-1020MB/s so your in the ball park.