Shin'ichiro, > ZBC Zoned Block Commands specification mandates SYNCHRONIZE CACHE (16) > for host-managed zoned block devices, but does not mandate SYNCHRONIZE > CACHE (10). Call SYNCHRONIZE CACHE (16) in place of SYNCHRONIZE CACHE > (10) to ensure that the command is always supported. For this purpose, > add use_16_for_sync flag to struct scsi_device in same manner as > use_16_for_rw flag. Applied to 6.2/scsi-staging, thanks! -- Martin K. Petersen Oracle Linux Engineering