SCCM Current Branch PXE Boot Lenovo T14

Question

So we got a new model Lenovo laptop to deploy - second gen Lenovo T14. No ethernet cable, so I used a dock and was able to PXE Boot, but it always died right after boot.sdi message. Error 0xc0000001. "A required device isn't connected or can't be accessed."

A quick Google search pointed me to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\DP

Change RamDiskTFTPBlockSize from 16384 to 1456.

I did this and I was able to PXE boot, but the process to download the Boot.wim took a little over 8 minutes.

When I first inherited this environment, the boot wim load time was well over an hour and since no one here knew any better it stayed that way until I changed this same reg key and got it down to the standard 2/3 minute load time.

Here is my question finally - is there a secret sauce for getting to work on the newer laptops but load a little quicker? I am about to test PXE booting on the older models to see how long they take.

Answer 1

It turns out the RAmDiskTFTPWIndowSize was set incorrectly. Back to my 2/3 minute download.