more usb

[Rick Stevens]

chuck lawrence wrote:
> Mark Knecht wrote:
> 
> | cat /proc/bus/usb/devices and look at the "Ver=" entry. From my Gentoo
> | laptop. Note: The driver is also a good clue, I think. ehci is 2.0.
> | ohci is 1.1.
> 
> and then...
> 
> Rick Stevens <rstevens at vitalstream.com> wrote:
> 
> | "Spd=480" is 480Mbps and that's USB2.  If it said "Spd=12", NOW you've
> | got USB1.1 (12Mbps), and now you know why they say USB2 is 40 times
> | faster than USB1.1 (480/12 = 40).  Simple, no?
> 
> 
> this is very helpful.  however, in my /proc/bus/usb/devices, I have...
> 
>  cat /proc/bus/usb/devices | grep Spd
> T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 3
> T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 3
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
> T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=12  MxCh= 0
> 
> and...
> 
>  cat /proc/bus/usb/devices | grep Ver
> D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
> D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
> 
> and yet...
> 
>  cat /proc/bus/usb/devices | grep -i hci
> S:  Product=USB OHCI Root Hub
> S:  Product=USB OHCI Root Hub
> 
> 
> so, do I have both (Ver=)?  there are usb ports front and back.  if so, 
> do I not see any Spd=480 or EHCI because I don't have any devices 
> plugged into the 2.0 ports?

No, the bus type itself should be displayed regardless on if you have
devices plugged in or not.  It looks like you have two busses now,
both USB1.1.  Can you post the entire output of these commands:

	uname -a
	lsusb -v
	cat /proc/bus/usb/devices

>                              also, back to my original, secondary 
> questions...
> 
> why is "mkfs -V /dev/sdb1" crashing my system?

When you say "crashing my system", you mean a total lockup or an oops
is occurring?  Are you sure you have a valid partition table on
/dev/sdb?  What does "fdisk -l /dev/sdb" say?
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- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
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