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Old 03-30-2006, 12:02 PM   #1
cheerfulpickle
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Registered: Jul 2004
Distribution: Mandriva 2006
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Question Is there a test for USB 2.0 vs. USB 1.1?


I am considering getting an external hard drive (once I save up enough $$$). My computer has two USB hubs, both operated by ‎Intel ‎82820 815e (Camino 2) Chipsets. Since Intel came out with the chipsets about the same time USB 2.0 came out, I suspect that they are probably USB 1.1, but my Mandriva Linux Control Panel gives me no indication of whether they are USB 1.1 or USB 2.0. How can I be sure BEFORE connecting an external drive? Is there some app that can test for that?

Thanks.

Andy
 
Old 03-30-2006, 02:43 PM   #2
imitheos
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Registered: May 2005
Location: Greece
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Quote:
Originally Posted by cheerfulpickle
I am considering getting an external hard drive (once I save up enough $$$). My computer has two USB hubs, both operated by ‎Intel ‎82820 815e (Camino 2) Chipsets. Since Intel came out with the chipsets about the same time USB 2.0 came out, I suspect that they are probably USB 1.1, but my Mandriva Linux Control Panel gives me no indication of whether they are USB 1.1 or USB 2.0. How can I be sure BEFORE connecting an external drive? Is there some app that can test for that?

Thanks.

Andy
I don't know if there is a test but you can easily understand it from the name. There are many ways.

1) Run /sbin/lspci
Code:
bash-3.1$ /sbin/lspci
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 03)
Pretty much all USB2 controllers conform to the EHCI standard. So if you see the name "EHCI" it is a USB2.
USB1 are either UHCI or OHCI. Since you mention intel chipset then it is UHCI.
USB2 controllers have USB1.1 "translators" that is why you also see UHCI in my output.
So, in other words, if you only see UHCI you have USB1.1 and if you see both UHCI and EHCI you have USB2.

2) Run dmesg
Code:
bash-3.1$ dmesg |grep HCI
ehci_hcd 0000:00:1d.7: EHCI Host Controller
ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
uhci_hcd 0000:00:1d.0: UHCI Host Controller
uhci_hcd 0000:00:1d.1: UHCI Host Controller
uhci_hcd 0000:00:1d.2: UHCI Host Controller
uhci_hcd 0000:00:1d.3: UHCI Host Controller
I hope i helped
 
  


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