SCSI block devices has SG_IO IOCTL interface by which applications can identify the device uniquely. This helps applications identify the device uniquely without relying on the device file names or any other mechanisms. For more details l ook at the manpage of sg_inq commnad. https://manned.org/sg_inq Some of the non SCSI devices also support this SG_IO interface for inquiry. Examples include SATA, NVME, Virtual Disks. It is desired to identify every RBD uniquely just from the device file. It will help in using RBD devices as drop in replacement for SCSI/SATA devices. Currently the RBD code in ceph-client does not support the SG_IO ioctl interface for inquiry to identify the device uniquely. Has adding the SG_IO ioctl interface to the RBD devices ever been considered before? Thanks, Nitin-- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
