Transfer cap to USB3.0 at 35MB/s?

[michalma]

Saw Merlin's screenshots showing 50+MB/s transfers on AC68u. Never got close to that on mine:
AC68u, 3.0.0.4.374.38_2 firmware, with USB3.0 drive attached, formatted NTFS.
Doing "dd if=/dev/zero of=testfile bs=100k count=10k && sync" on wired (1Gbit) connection shows max transfer rate of 35MB/s. Which is what I get for regular file transfers, Apple Time Machine etc.

Same thing when done on the router itself shows transfers ~100MB/s to the same drive/folder.

What gives? So far seems to me there is router performance cap I am hitting somewhere? Would be around 240Mbps on wired, 160Mbps on wireless. Strange.

 

[GoNz0]

what are the speeds from the computer direct to the drive?

 

[mtrains]

Do you have 'Reducing USB 3.0 Interference' enabled in the 'Professional' tab for 2.4 GHz. That will limit your speed.

 

[michalma]

what are the speeds from the computer direct to the drive?

When the drive is attached directly to the computer over USB - transfers are ~100MB/s.

 

[michalma]

Do you have 'Reducing USB 3.0 Interference' enabled in the 'Professional' tab for 2.4 GHz. That will limit your speed.

"Reducing USB 3.0 Interference" is disabled in my case. Also please note that the router itself can write to the drive at around 100MB/s. So I assume there is no issue there.\
By the way - also tried with that option enabled. And also with EXT4-formatted drive vs. NTFS. All had the same limit. EXT4 was even slower in my case than NTFS, with transfers capped around 25MB/s.

Let me put it this way:
PC or Mac wired -> AC68u -> USB3.0 drive = 35MB/s
AC68u -> USB3.0 drive = 100MB/s

 

[SnajperskY]

Saw Merlin's screenshots showing 50+MB/s transfers on AC68u.

I guess you saw this one. However, 50 MB/s flies from Merlin's router to a laptop. Not the other way around, where indeed you can count on ~35 MB/s. This is exactly what I can see in my setup: WD 1T USB 3.0, ext4, wired. Maybe you may need to look closer at smb.conf in order to improve things a bit.