Not sure about dd, but I have used wipe to scrub a partition, worked quite well. I think it was as simple as wipe -k /dev/sdX1
That message can hint to a broken / defective usb-port. Maybe you have two front-usb slots registered as port 3 and port 4? I've seen broken front-usb slots before, but this is just a guess. Try disconnecting them from the motherboard.
This issue may be related to Syslinux 6.02, which has been identified and fix in the latest ISO. See https://bbs.archlinux.org/viewtopic.php?id=173665 and https://bbs.archlinux.org/viewtopic.php?id=172588 for further information.
DSpider wrote:https://wiki.archlinux.org/index.php/US … _USB_driveMake sure to use /dev/sdx and NOT /dev/sdx1. This is a very common error!Also: https://wiki.archlinux.org/index.php/Arch64_FAQ (specifically "Why 64-bit?")Yes!!! for usb I had used /dev/sdb1.