修复VCSA检测不到更新ISO
执行software-packages stage --iso的时候提示错误如下
The CD drive does not have a valid patch ISO or has an unsupported version
通过SSH登录VCSA控制台，进入shell模式下执行
rm /dev/sr0; sleep 5; mknod /dev/sr0 b 11 0; chown root:cdrom /dev/sr0; chmod 660 /dev/sr0
重新挂载ISO后执行software-packages stage --iso即可。
参考资料
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/vsphere-vcenter-server-65u3s-release-notes.html
https://knowledge.broadcom.com/external/article/344907/patching-from-vcenter-server-65-u3r-or-6.html