问题：
Failed to mount cd:///?devices=/dev/disk/by-id/ata-VMware_Virtual_SATA_CDRW_Drive_01000000000000000001 on /var/adm/mount/AP_0xKXYS7l: Mounting media failed (mount: no medium found on /dev/sr0)
Please insert medium [SLES12-SP3-12.3-0] #1 and type 'y' to continue or 'n' to cancel the operation. [yes/no] (no):
解决方案：
镜像没有挂载
CD/DVD→上面两个勾上，下面选第二个给镜像的路径