USB ehci slow speed

GoogleGroups
1

Hi all,

I tried a Debian install on the BeagleBoard (from http://rcn-ee.net/deb/kernel/…).
My idea was to make RAID available by mdadm (software raid), plug two
disks and get a cheap homeserver. For this, I had to install a module-
enabled kernel and install mdadm. That's where things get cloudy…
Every USB device I stress, by a dd or a RAID sync gets this "warning"
in syslog: "reset high speed USB…"; then it can disappear from the
system randomly.

The workaround for this is to boot with "irqpoll". But the drawback
now is that I can't get any better than 2MB/s write speed!

Unfortunately, I found no hints about this specific problem...

Thanks in advance!

2

Any chance you can let us know what revision of board you have?

Gerald

3

Hello,

Hi all,

I tried a Debian install on the BeagleBoard (from http://rcn-ee.net/deb/kernel/…).
My idea was to make RAID available by mdadm (software raid), plug two
disks and get a cheap homeserver. For this, I had to install a module-
enabled kernel and install mdadm. That's where things get cloudy...
Every USB device I stress, by a dd or a RAID sync gets this "warning"
in syslog: "reset high speed USB..."; then it can disappear from the
system randomly.

This could be a couple things... For reference, is it a Bx, C2/3 or a
C4 board and ehci or otg port and which kernel are you using from my
hosting site? 'uname -a'

The workaround for this is to boot with "irqpoll". But the drawback
now is that I can't get any better than 2MB/s write speed!

I can't access my home network at the moment, thinking lighting took
out my ups as i'm traveling, but my beagles usually got 20-30MB/s thru
hdparm -tT..

Regards,