Just plugged in a newly purchased USB external hard drive 1TB - Stunned with my Ubuntu OS simply did not detect!
dmesg's
[ 130.433880] scsi8 : uas
[ 151.820010] scsi 8:0:0:0: uas_eh_abort_handler tag -1
[ 151.820024] scsi 8:0:0:0: uas_eh_device_reset_handler tag -1
[ 151.820030] scsi 8:0:0:0: uas_eh_target_reset_handler tag -1
[ 151.820036] scsi 8:0:0:0: uas_eh_bus_reset_handler tag -1
[ 151.824027] usb 1-1.1: URB BAD STATUS -71
[ 151.892010] usb 1-1.1: reset high speed USB device number 6 using ehci_hcd
[ 151.984903] scsi 8:0:0:0: Device offlined - not ready after error recovery
[ 302.577810] usb 1-1.1: USB disconnect, device number 6
[ 307.634478] usb 1-1.1: new high speed USB device number 7 using ehci_hcd
Steps to resolve the issue:
Disconnect the drive
$rmmod uas
Create a new file and like :
$cat /etc/modprobe.d/blacklist-uas.conf
blacklist uas;
Connect the drive it simply works! Voila... ;)