CentOS 7 recently had an error when connecting a USB drive. I guess this came after updating to the latest kernel. The errors in dmesg or /var/log/messages were:

[ 4159.607574] usb 1-1: new full speed USB device using uhci_hcd and address 4
[ 2079.875502] usb 1-1: device descriptor read/64, error -71
[ 2080.099379] usb 1-1: device descriptor read/64, error -71
[ 2080.319263] usb 1-1: new full speed USB device using uhci_hcd and address 5
[ 2080.443858] usb 1-1: device descriptor read/64, error -71
[ 4161.322029] usb 1-1: device descriptor read/64, error -71
[ 4161.537896] usb 1-1: new full speed USB device using uhci_hcd and address 6
[ 4161.945615] usb 1-1: device not accepting address 6, error -71
[ 4162.057577] usb 1-1: new full speed USB device using uhci_hcd and address 7
[ 4162.465330] usb 1-1: device not accepting address 7, error -71

After some googleing i found a fix for that:

# vim /etc/modprobe.d/options.conf

and add following line to it:

options usbcore use_both_schemes=y

more information about what this line does can be found here.