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-   -   Telling whether a flash drive is USB 2.0 (https://www.linuxquestions.org/questions/linux-hardware-18/telling-whether-a-flash-drive-is-usb-2-0-a-651090/)

jeriryan 06-23-2008 12:43 PM
Telling whether a flash drive is USB 2.0
 
If there were no markings whatsoever on a flash drive (meaning no company name or writing of any sort), how could I tell within RedHat if the drive is USB 2.0 or 1.1? RedHat mounts it automatically but I haven't been able to find much info.

elliott678 06-23-2008 12:55 PM
Check the output of dmesg after plugging it in, one of the first lines pertaining to the drive should say something like this if it is 2.0:
Code:
usb 5-2: new high speed USB device using ehci_hcd and address 2
If it doesn't say "high speed USB", then it is likely 1.1. If it is using "uhci_hcd" instead of "ehci_hcd", it is also likely to be 1.1.


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