I have a server which may or may not have a USB storage device connected when it boots. It also attaches to a disk array with a number of logical disks using ISCSI. When booted with the USB device present, that is attached to /dev/sdb and the ISCSI disks are attached to /dev/sdc up. If the USB device is not present, then the ISCSI disks are attached to /dev/sdb onwards. Is there a way to force the USB device not to be attached at all, or to delay it until after the ISCSI disks have been attached so that I get a predictable assignment of device names to the ISCSI disks? James