Christoph, >> 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. > > Hmm, optimal == max is odd, What they mean to convey is that "device has no constraints". As opposed to a value of 0 which means "not reported". -- Martin K. Petersen Oracle Linux Engineering