unified installer hang (how to avoid) and resume install after download!
Hit the unified installer hang, reported elsewhere here, today. During "file optimization" it wedged my entire Windows 10 laptop - used ALL the memory, at %100 disk I/O, forced everything out to swap, and froze the desktop (mouse, keys, ctl-alt-delete). Looked like a major memory leak... Had to cold boot. Why are we doing file optimization on solid state drives?
The work-around is as Xilinx support has said: in the installer _disable_ the option (under "preferences") to optimize files after install.
But I then discovered how to get the installer to recognize already downloaded files! Use a cmd console, "cd:\Xilinx", "rmdir /s .xinstall DocNav Vitis Vivado" (it takes forever), leave the C:\Xilinx\Downloads and xic directories intact, and rerun the installer (Xilinx_Unified_2020.1_0602_1208_Win64.exe - it is probably in your <user>\Downloads directory). This time, for me, it did not whine about a non-empty install directory and proceeded to (briefly) say "Validating downloaded files" (before saying "Downloading" again - which it clearly was not doing). So yea, the installer knows about resume, it just lies about having to use a new download directory.