From f95d305cca4c88934e3227efb81fe959789fa707 Mon Sep 17 00:00:00 2001
From: cproudlock <cproudlock@localhost>
Date: Sun, 24 May 2026 14:09:06 -0400
Subject: [PATCH] startnet.cmd: robocopy /MT:16 + /J for faster waxtrace stage

Three speed bumps on the waxtrace WinPE stage:
- /MT:16 on the bundle robocopy (was single-thread). Parallelizes the
  small-files-many-of-them part (config + backups + prereqs).
- /J on the single-file FTPak ISO cherry-pick. Unbuffered I/O is
  measurably faster than xcopy on 2 GB-ish files over SMB; xcopy goes
  through the buffered I/O path which double-copies in kernel.
- Swap the FTPak ISO cherry-pick from xcopy to robocopy single-file
  syntax (source dir + dest dir + filename pattern) so we can use /J.

No behavioral change otherwise. Backup ZIP cherry-pick stays on xcopy
(it's ~1 MB, doesn't benefit from /J).
---
 playbook/startnet.cmd | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/playbook/startnet.cmd b/playbook/startnet.cmd
index 5b5573a..73e4ee4 100644
--- a/playbook/startnet.cmd
+++ b/playbook/startnet.cmd
@@ -499,7 +499,7 @@ REM matched FTPak ISO gets cherry-picked below into the same target dir.
 REM /NFL/NDL keep the listing manageable; output left visible (no >NUL) so
 REM any failure is debuggable from the install log. robocopy exit codes
 REM 0-7 are "OK" (per Microsoft); 8+ is real failure.
-robocopy "Y:\installers-post\waxtrace" "W:\WaxTrace-Install" /E /XD formtracepak /R:1 /W:1 /NFL /NDL
+robocopy "Y:\installers-post\waxtrace" "W:\WaxTrace-Install" /E /XD formtracepak /MT:16 /R:1 /W:1 /NFL /NDL
 if errorlevel 8 echo WARNING: robocopy exit %ERRORLEVEL% - some files may not have copied.
 mkdir W:\WaxTrace-Install\formtracepak 2>NUL
 echo Staged WaxTrace bootstrap minus formtracepak\ to W:\WaxTrace-Install.
@@ -516,7 +516,10 @@ set WTVER=
 if exist W:\Enrollment\waxtrace\version.txt set /p WTVER=<W:\Enrollment\waxtrace\version.txt
 if not "%WTVER%"=="" (
     if exist "Y:\installers-post\waxtrace\formtracepak\FORMTRACEPAK-V%WTVER%.iso" (
-        xcopy /Y "Y:\installers-post\waxtrace\formtracepak\FORMTRACEPAK-V%WTVER%.iso" "W:\WaxTrace-Install\formtracepak\"
+        REM robocopy /J = unbuffered I/O, meaningfully faster than xcopy on
+        REM 2 GB FTPak ISOs over SMB. Single-file syntax: source dir, dest
+        REM dir, file pattern.
+        robocopy "Y:\installers-post\waxtrace\formtracepak" "W:\WaxTrace-Install\formtracepak" "FORMTRACEPAK-V%WTVER%.iso" /J /R:1 /W:1 /NFL /NDL
         echo Staged FormTracePak V%WTVER%.iso for %MACHINENUM%.
     ) else (
         echo WARNING: No FORMTRACEPAK-V%WTVER%.iso on share for %MACHINENUM% - 09-Setup-WaxAndTrace will abort cleanly with the version-mismatch error.