When pressing F8 to check smsts.log, there was nothing there out of the ordinary. The only interesting thing I could see there, was that it hadn't added in the latest log data yet, so as far as it was concerned, there was nothing wrong with the OSD.
I checked my IP, which was fine. I tried pinging the SCCM server (and any other server on the network) and noticed that I was getting a lot of packet loss. This explains the issue that I was getting. Essentially, the network connectivity would be completely find up until a point where it would start getting massive packet loss, and then fail during the download.
I ruled out a physical issue with cabling, patching and the device by trying different network ports on the wall, and also trying different Dell machines (all 7040 however). I received the issue on all of the machines, virtually at the same point in the Task Sequence.
I attempted to inject different drivers into the Boot image, but that didn't help either. I was happy that this wasn't a driver issue, and it wasn't a physical networking issue. The look continues!
I added in three Task Sequence Variables into the beginning of my OSD Task Sequence. The idea behind these was to make the deployment less delicate, and to continuing working through the TS if there's some packet loss etc.
The variables I added are the following:
After adding these TS Variables in there, I restarted the machine and went through the OSD sequence. This time it completed without any issues.
Essentially the issue was that with the drivers and WinPE versions on this particular machine, the NIC was a bit flakey. Packets were dropped etc which originally caused it to fail. These variables just told the Task Sequence to be less particular when it comes to timing out. There will still be that intermittent packet loss when doing the TS, but this time it won't cause it to fail.
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