What is MicroSD write/read speed on GL-MT300A?

Technical Support for Routers
1

Hi,

I use GL-AR300M with 64Gb SanDisk Ultra USB pen drive and write video data there with about 20Mbits/sec rate.

The bad thing there is that the USB is reseted constantly with error like:

[ 3052.170000] usb 1-1.3: reset high-speed USB device number 5 using ehci-platform

I tried several pen drives and many OpenWrt configuration parameters with no luck.

So I am wondering if this issue can be overcame with GL-MT300A and MicroSD card?

What real application speed MicroSD can provide there (assuming I use strong class 10 card)?

And will the HW be able to write 20Mbits/sec constantly without issues like I have with USB?

 

Thank you in advance for your answers.

 

 

 

 

 

2

Can you try a differential power adapter? AR300M consumes more power.

MT300A can achieve 17Mbps when writing to SD card from our test.

3

Thank you for your answers. I will try MT300A.

With AR300M I tried a few already up to 3A.

Also I tried a USB hub with additional power.

Is there any test/diagnostic I can perform to get more information on the USB issue?

 

 

4

Not sure. We can do some test here.

What file system format do you use? NTFS, ext, vfat?

5

ext4 with the folowing mount options:

<span style=“font-family: ‘Helvetica Neue’, Roboto, Arial, sans-serif;”>rw,async,noatime,data=writeback,commit=300,barrier=1,min_batch_time=0,max_batch_time=0</span>

The case to reproduce is pretty straight forward:

4-6 processes that write data to the drive around 2-3 Mbps each. (actually all this data comes via ethernet)

The “reset” messages appears randomly each 10 min - 3 hours.