On 6/29/23 07:54, Bart Van Assche wrote: > On 6/26/23 13:35, Daniel Rozsnyó wrote: >> There are some drives, or more precisely - normal drives with a >> custom firmware, that simply reject a regular Write - likely as not >> being good enough for the intended high-rel application - which I can >> understand, but even after reformatting the drive to no-PI and going to >> "poor" 512B sector size, they still refuse to do an easy Write >> operation. I had verified that by using the sg_write_verify (that uses >> an ioctl) I can really write data to these drives. The reading path is >> working okay and both dd and hdparm works at expected speeds. > > To me the above sounds like the drive firmware is broken. Please fix the > drive firmware and make sure that WRITE commands are accepted. All write commands are optional in SBC. So having a drive supporting write verify and not supporting regular write 10/16/32 is actually acceptable per specs. I agree that this is odd, but it is not a spec violation. So the question is: do we want to detect and support that ? > > Thanks, > > Bart. > -- Damien Le Moal Western Digital Research
