>A piece of code I am reading sends the Inquiry cmd to lun 0 first and then to >the actual lun to be probed. As only SCSI devices have the concept of luns... I >think the 1st probe to lun 0 is to check if it is a SCSI device That doesn't make much sense. It's also true that only SCSI devices have the concept of the SCSI Inquiry command. There's no interface with which you could send an Inquiry command to a device which is not in some way SCSI. But I can imagine using such a sequence to distinguish the absence of a particular logical unit from the absence of the entire physical unit. It would be useful in problem diagnosis to know which of those is the case. - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
