Asus RT-N66U slow usb

[pr0tey]

Hello.
I installed merlin-mod of asus-firmware, then connect 1Tb usb-hdd.
Read-speed from drive is to slow:
hdparm -Tt /dev/sdb
/dev/sdb:
Timing cached reads: 2 MB in 3.98 seconds = 514.47 kB/sec
Timing buffered disk reads: 2 MB in 3.34 seconds = 612.97 kB/sec

Few days I try increased drive speed.. And what I found:
Slow speed of hdd because it's connected as usb 1.1 device (hdd usb 3 compatable)
I found few steps for increase drive-speed from 500-1000 kB/s to 100 mB/s
- rmmod uhci_hcd;
- modprobe ehci_hcd;
- stop all services
- umount drive
- unplug drive
- connect drive

After these steps:
hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads: 266 MB in 2.00 seconds = 133.00 MB/sec
Timing buffered disk reads: 70 MB in 3.02 seconds = 23.20 MB/sec

I try add "rmmod uhci_hcd; modprobe ehci_hcd;" into init-start script but no effect =( Need stop services,umount drive etc..

In second usb-port i have old 80Gb drive. It run as usb 2.0 device from start.

Somebody have any ideas? =)

 

[ryzhov_al]

Try to add

echo -n Y >/sys/module/usbcore/parameters/old_scheme_first

to /jffs/scripts/init-start script. Hope it will help.

 

[pr0tey]

Try to add

echo -n Y >/sys/module/usbcore/parameters/old_scheme_first

to /jffs/scripts/init-start script. Hope it will help.

Thanks for quick answer
I tryed it early, no effect

If I understand, on this manual talk about tomato.
It writes about "USB and NAS/USB Support/USB 1.1 Support" checkbox. Maybe it can help me =) But what this checkbox are doing on system-level?

 

[pr0tey]

Something strange..
Today I hard-reset router, format and check usb-drive.
After start and initial-setup I installed download-master and disable it (for ipkg).
After this actions I have normal usb-speed.
Then I continued configure device and checked usb-speed after each step.

And what I discover, usb-drive go at usb 1.1 after reboot from web-interface =)
If I reboot system from console - speed good.
If from web-interface - speed is very low (reset from console not help after lower speed).

I hard-reset and checked disk again, speed is normal again. Then I continue configuring device, don't used reboot-button from web-interface.

But after some step (I did not see what kind of step): speed low again =(
I think some action on configure - call function "reboot" from apply.cgi =(

 

[craleon]

this sounds familiar… i'm running tomato but this reminded me that i'd seen the usb connection reset and go 1.1, but it happened too consistently that i thought it couldn't possibly be dropping to USB1 speeds… now i think i should find some time to check on this too.

(edit to clarify that i'd noticed it on tomato, not back when i was on asuswrt-merlin. so might be a component the two share?)

 

[ealva]

Hi guys,

Please, I am having the same problem with my USB drive. Sorry for the stupid question but how to be shure that my drive is connected as 1.1 USB instead a 2.0 ?

Is there any step by step tutorial to connect it as USB 2.0 device ?

Edit:

Ok guys, I found a way:

T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0bc2 ProdID=3300 Rev= 1.30
S: Manufacturer=Seagate
S: Product=Desktop
S: SerialNumber=2GHNMPBE
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Now since USB 1.1 is not the problem, does anyone have any tips why I just get around 300/500 kbps when copying files over my wireless network to my USB drive connected in my N66U router ?

Thanks
Eduardo