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Slow boot speed when multiple client boot simultaneously

Problem:

It takes about 1 minute to boot one client PC, but when all clients boot simultaneously, it takes a very long time (about 15 minutes to boot 50 client PCs). The clients boot speed is too slow.

The common issue for having slow diskless booting is listed bellow

  1. The Server and Client is not Gigabit LAN speed
  2. The Image is not properly optimized
  3. Server and client network are not properly optimized also
  4. Faulty Image disk and Write-Back disk