Christoph, > 0xffff as the max and a weirdly uneven number even for partity RAID > seems like a good value to ignore by default. Quite a few SCSI devices report 0xffff to indicate that the optimal transfer length is the same as the maximum transfer length which for low-byte commands is capped at 0xffff. That's where the odd value comes from in some cases. > But then again just dealing with USB will probably catch the majority > of cases. Yep. -- Martin K. Petersen Oracle Linux Engineering