On 4/22/21 6:10 PM, Bart Van Assche wrote: > On 4/21/21 11:37 PM, Hannes Reinecke wrote: >> On 4/21/21 11:11 PM, Bart Van Assche wrote: >>> Do all SCSI devices from the nineties report SCSI status values with >>> the lower bit set to 0? If so, can the status_byte() macro be removed >>> entirely? >>> >> As indicated in the previous reply, yes, that is the plan (removing the >> status_byte() macro). And the drivers will have to report SCSI status >> values with the lower bit cleared, otherwise the linux SCSI status codes >> would never have worked in the first place. > > Please elaborate the above further. My understanding is that SCSI-2 > defines bits 0, 6 and 7 of the status byte as reserved while SAM-2 > specifies that these bits must be zero for the status codes that also > have been defined in SCSI-2. Is it safe to assume that all SCSI-2 > devices set the reserved bits to zero? > Yes. At least we haven't encountered any devices which do. And are quite unlikely to find any new or unknown SCSI-2 devices, as the market for SCSI parallel drives is _quite_ small :-) Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@xxxxxxx +49 911 74053 688 SUSE Software Solutions Germany GmbH, 90409 Nürnberg GF: F. Imendörffer, HRB 36809 (AG Nürnberg)
